./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 --- 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-b5237d8 [2022-11-22 02:27:08,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:27:08,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:27:08,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:27:08,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:27:08,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:27:08,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:27:08,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:27:08,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:27:08,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:27:08,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:27:08,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:27:08,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:27:08,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:27:08,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:27:08,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:27:08,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:27:08,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:27:08,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:27:08,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:27:08,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:27:08,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:27:08,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:27:08,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:27:08,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:27:08,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:27:08,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:27:08,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:27:08,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:27:08,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:27:08,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:27:08,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:27:08,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:27:08,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:27:08,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:27:08,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:27:08,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:27:08,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:27:08,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:27:08,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:27:08,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:27:08,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 02:27:08,196 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:27:08,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:27:08,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:27:08,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:27:08,199 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:27:08,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:27:08,199 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:27:08,199 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:27:08,200 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:27:08,200 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:27:08,201 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:27:08,201 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:27:08,202 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:27:08,202 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:27:08,202 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:27:08,202 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:27:08,203 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:27:08,203 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:27:08,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:27:08,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:27:08,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:27:08,204 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:27:08,205 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:27:08,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:27:08,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:27:08,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:27:08,206 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:27:08,206 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:27:08,206 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 02:27:08,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:27:08,207 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:27:08,207 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:27:08,208 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:27:08,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:27:08,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:27:08,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:27:08,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:27:08,209 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:27:08,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:27:08,209 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:27:08,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:27:08,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:27:08,211 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_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 [2022-11-22 02:27:08,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:27:08,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:27:08,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:27:08,578 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:27:08,579 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:27:08,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2022-11-22 02:27:11,551 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:27:11,812 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:27:11,812 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2022-11-22 02:27:11,830 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/data/36424421b/611eedd557b548e0978c38c9d641c2a4/FLAG9cb28d7ca [2022-11-22 02:27:11,848 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/data/36424421b/611eedd557b548e0978c38c9d641c2a4 [2022-11-22 02:27:11,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:27:11,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:27:11,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:27:11,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:27:11,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:27:11,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:27:11" (1/1) ... [2022-11-22 02:27:11,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ccb7555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:11, skipping insertion in model container [2022-11-22 02:27:11,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:27:11" (1/1) ... [2022-11-22 02:27:11,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:27:11,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:27:12,213 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2022-11-22 02:27:12,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:27:12,224 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:27:12,269 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2022-11-22 02:27:12,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:27:12,296 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:27:12,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:12 WrapperNode [2022-11-22 02:27:12,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:27:12,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:27:12,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:27:12,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:27:12,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:12" (1/1) ... [2022-11-22 02:27:12,320 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:12" (1/1) ... [2022-11-22 02:27:12,344 INFO L138 Inliner]: procedures = 127, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2022-11-22 02:27:12,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:27:12,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:27:12,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:27:12,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:27:12,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:12" (1/1) ... [2022-11-22 02:27:12,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:12" (1/1) ... [2022-11-22 02:27:12,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:12" (1/1) ... [2022-11-22 02:27:12,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:12" (1/1) ... [2022-11-22 02:27:12,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:12" (1/1) ... [2022-11-22 02:27:12,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:12" (1/1) ... [2022-11-22 02:27:12,374 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:12" (1/1) ... [2022-11-22 02:27:12,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:12" (1/1) ... [2022-11-22 02:27:12,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:27:12,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:27:12,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:27:12,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:27:12,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:12" (1/1) ... [2022-11-22 02:27:12,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:27:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:12,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:27:12,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:27:12,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:27:12,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:27:12,480 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-22 02:27:12,480 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-22 02:27:12,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:27:12,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:27:12,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:27:12,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 02:27:12,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 02:27:12,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:27:12,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 02:27:12,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:27:12,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:27:12,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:27:12,693 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:27:12,696 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:27:13,320 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:27:13,379 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:27:13,379 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 02:27:13,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:27:13 BoogieIcfgContainer [2022-11-22 02:27:13,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:27:13,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:27:13,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:27:13,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:27:13,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:27:11" (1/3) ... [2022-11-22 02:27:13,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5439d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:27:13, skipping insertion in model container [2022-11-22 02:27:13,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:12" (2/3) ... [2022-11-22 02:27:13,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5439d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:27:13, skipping insertion in model container [2022-11-22 02:27:13,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:27:13" (3/3) ... [2022-11-22 02:27:13,392 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_append_unequal.i [2022-11-22 02:27:13,414 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:27:13,415 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2022-11-22 02:27:13,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:27:13,463 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6bf6a91c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:27:13,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2022-11-22 02:27:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 119 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:27:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:27:13,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:13,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:27:13,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:27:13,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:13,481 INFO L85 PathProgramCache]: Analyzing trace with hash 236278568, now seen corresponding path program 1 times [2022-11-22 02:27:13,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:13,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235881910] [2022-11-22 02:27:13,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:13,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:13,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:13,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235881910] [2022-11-22 02:27:13,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235881910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:13,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:13,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:27:13,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746272022] [2022-11-22 02:27:13,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:13,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:13,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:13,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:13,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:13,840 INFO L87 Difference]: Start difference. First operand has 124 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 119 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:14,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:14,028 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2022-11-22 02:27:14,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:14,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 02:27:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:14,039 INFO L225 Difference]: With dead ends: 121 [2022-11-22 02:27:14,039 INFO L226 Difference]: Without dead ends: 119 [2022-11-22 02:27:14,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:14,044 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:14,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 168 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:27:14,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-22 02:27:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-11-22 02:27:14,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 54 states have (on average 2.259259259259259) internal successors, (122), 114 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:27:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2022-11-22 02:27:14,087 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 5 [2022-11-22 02:27:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:14,088 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2022-11-22 02:27:14,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:14,088 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2022-11-22 02:27:14,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:27:14,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:14,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:27:14,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:27:14,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:27:14,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:14,090 INFO L85 PathProgramCache]: Analyzing trace with hash 236278569, now seen corresponding path program 1 times [2022-11-22 02:27:14,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:14,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718961992] [2022-11-22 02:27:14,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:14,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:14,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:14,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718961992] [2022-11-22 02:27:14,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718961992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:14,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:14,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:27:14,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280431695] [2022-11-22 02:27:14,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:14,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:14,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:14,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:14,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:14,193 INFO L87 Difference]: Start difference. First operand 119 states and 128 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:14,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:14,307 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2022-11-22 02:27:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:14,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 02:27:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:14,309 INFO L225 Difference]: With dead ends: 116 [2022-11-22 02:27:14,309 INFO L226 Difference]: Without dead ends: 116 [2022-11-22 02:27:14,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:14,311 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:14,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 173 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:27:14,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-22 02:27:14,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-22 02:27:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 111 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:27:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2022-11-22 02:27:14,321 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 5 [2022-11-22 02:27:14,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:14,321 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2022-11-22 02:27:14,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2022-11-22 02:27:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 02:27:14,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:14,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:14,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:27:14,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:27:14,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:14,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2064311437, now seen corresponding path program 1 times [2022-11-22 02:27:14,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:14,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104280] [2022-11-22 02:27:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:14,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:14,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:14,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104280] [2022-11-22 02:27:14,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:14,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:14,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:14,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36726621] [2022-11-22 02:27:14,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:14,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:14,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:14,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:14,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:14,452 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:27:14,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:14,510 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2022-11-22 02:27:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:14,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-22 02:27:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:14,522 INFO L225 Difference]: With dead ends: 127 [2022-11-22 02:27:14,522 INFO L226 Difference]: Without dead ends: 127 [2022-11-22 02:27:14,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:14,528 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:14,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 219 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:27:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-22 02:27:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2022-11-22 02:27:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 112 states have internal predecessors, (120), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:27:14,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2022-11-22 02:27:14,550 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 11 [2022-11-22 02:27:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:14,550 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2022-11-22 02:27:14,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:27:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2022-11-22 02:27:14,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 02:27:14,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:14,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:14,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:27:14,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:27:14,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:14,554 INFO L85 PathProgramCache]: Analyzing trace with hash 260826486, now seen corresponding path program 1 times [2022-11-22 02:27:14,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:14,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240379837] [2022-11-22 02:27:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:14,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:27:14,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:14,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240379837] [2022-11-22 02:27:14,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240379837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:14,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:14,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:27:14,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643798467] [2022-11-22 02:27:14,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:14,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:27:14,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:14,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:27:14,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:27:14,847 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:27:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:15,126 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2022-11-22 02:27:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:27:15,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-22 02:27:15,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:15,130 INFO L225 Difference]: With dead ends: 117 [2022-11-22 02:27:15,130 INFO L226 Difference]: Without dead ends: 117 [2022-11-22 02:27:15,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:27:15,140 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 18 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:15,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 316 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:27:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-22 02:27:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-11-22 02:27:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 111 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:27:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2022-11-22 02:27:15,158 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 19 [2022-11-22 02:27:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:15,158 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2022-11-22 02:27:15,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:27:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2022-11-22 02:27:15,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 02:27:15,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:15,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:15,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:27:15,161 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:27:15,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:15,162 INFO L85 PathProgramCache]: Analyzing trace with hash 260826487, now seen corresponding path program 1 times [2022-11-22 02:27:15,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:15,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709130945] [2022-11-22 02:27:15,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:15,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:27:15,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:15,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709130945] [2022-11-22 02:27:15,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709130945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:15,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:15,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:27:15,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87920584] [2022-11-22 02:27:15,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:15,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:27:15,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:27:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:27:15,426 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:27:15,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:15,669 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2022-11-22 02:27:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:27:15,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-22 02:27:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:15,671 INFO L225 Difference]: With dead ends: 116 [2022-11-22 02:27:15,671 INFO L226 Difference]: Without dead ends: 116 [2022-11-22 02:27:15,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:27:15,672 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 16 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:15,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 340 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:27:15,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-22 02:27:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-11-22 02:27:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 110 states have internal predecessors, (118), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:27:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2022-11-22 02:27:15,678 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 19 [2022-11-22 02:27:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:15,678 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2022-11-22 02:27:15,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:27:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2022-11-22 02:27:15,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 02:27:15,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:15,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:15,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:27:15,680 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:27:15,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:15,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1546149591, now seen corresponding path program 1 times [2022-11-22 02:27:15,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:15,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388809271] [2022-11-22 02:27:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:15,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:16,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:16,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388809271] [2022-11-22 02:27:16,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388809271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:16,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78849452] [2022-11-22 02:27:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:16,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:16,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:16,049 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:16,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:27:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:16,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:27:16,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:16,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:27:16,336 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_212 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_212))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-22 02:27:16,400 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:27:16,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-22 02:27:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-22 02:27:16,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:16,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78849452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:16,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557525397] [2022-11-22 02:27:16,546 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 02:27:16,546 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:16,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:16,557 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:16,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:16,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 02:27:16,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:16,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:27:16,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:27:16,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:27:16,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:27:16,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:27:16,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:27:16,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:27:16,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:27:16,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:27:16,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:27:16,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:27:16,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:27:16,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:16,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:16,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:27:17,269 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:27:17,269 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:27:17,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:17,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:17,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:17,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:17,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:27:17,647 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:17,649 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:17,758 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:27:17,758 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:27:17,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:18,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:18,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:18,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:27:18,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:18,067 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:18,069 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:18,072 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:18,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 02:27:18,169 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 02:27:18,188 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 21 [2022-11-22 02:27:18,311 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:27:18,312 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:27:18,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:18,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:18,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:18,506 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 90 for LOIs [2022-11-22 02:27:19,004 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:24,554 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1419#(and (< |#StackHeapBarrier| |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (not (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| 0)) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_~data#1| |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_main_~len~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start_dll_circular_create_~head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_dll_circular_create_~len#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 8) |ULTIMATE.start_dll_circular_create_~data#1|) (= (select |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#s~0#1.base|) 0) (= (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 12) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| 0)) (< |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:27:24,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:24,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:27:24,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2022-11-22 02:27:24,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297188579] [2022-11-22 02:27:24,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:24,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 02:27:24,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:24,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 02:27:24,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=432, Unknown=3, NotChecked=42, Total=552 [2022-11-22 02:27:24,557 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:27:25,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:25,033 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2022-11-22 02:27:25,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:27:25,034 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-22 02:27:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:25,035 INFO L225 Difference]: With dead ends: 139 [2022-11-22 02:27:25,035 INFO L226 Difference]: Without dead ends: 139 [2022-11-22 02:27:25,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=4, NotChecked=46, Total=650 [2022-11-22 02:27:25,036 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 102 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:25,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 327 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 443 Invalid, 0 Unknown, 119 Unchecked, 0.4s Time] [2022-11-22 02:27:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-22 02:27:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2022-11-22 02:27:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 114 states have internal predecessors, (124), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:27:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2022-11-22 02:27:25,043 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 21 [2022-11-22 02:27:25,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:25,044 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2022-11-22 02:27:25,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:27:25,044 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2022-11-22 02:27:25,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 02:27:25,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:25,045 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:25,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:25,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:25,252 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:27:25,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:25,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1546149592, now seen corresponding path program 1 times [2022-11-22 02:27:25,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:25,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222471862] [2022-11-22 02:27:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:25,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:25,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:25,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222471862] [2022-11-22 02:27:25,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222471862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:25,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216135386] [2022-11-22 02:27:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:25,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:25,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:25,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:25,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:27:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:25,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-22 02:27:25,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:25,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:27:25,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:27:26,036 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:27:26,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 02:27:26,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2022-11-22 02:27:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:26,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:30,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216135386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:30,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1798003929] [2022-11-22 02:27:30,242 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 02:27:30,242 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:30,242 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:30,242 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:30,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:30,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 02:27:30,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:30,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:27:30,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:27:30,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:27:30,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:27:30,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:27:30,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:27:30,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:27:30,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:27:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:27:30,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:27:30,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:27:30,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:27:30,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:30,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:27:30,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,561 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:27:30,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:27:30,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:30,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:30,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:30,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:30,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:27:30,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,684 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:27:30,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:27:30,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:27:30,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:30,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:30,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:30,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:30,862 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 02:27:30,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 02:27:30,890 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 21 [2022-11-22 02:27:30,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,948 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:27:30,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:27:30,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:30,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:30,986 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 94 for LOIs [2022-11-22 02:27:31,444 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:36,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1784#(and (< |#StackHeapBarrier| |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (not (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| 0)) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_~data#1| |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_main_~len~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start_dll_circular_create_~head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_dll_circular_create_~len#1|) (< (select |#length| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 8)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 8) |ULTIMATE.start_dll_circular_create_~data#1|) (= (select |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#s~0#1.base|) 0) (= (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 12) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| 0)) (< |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:27:36,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:36,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:27:36,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2022-11-22 02:27:36,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041406251] [2022-11-22 02:27:36,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:36,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:27:36,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:36,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:27:36,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:27:36,971 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:27:37,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:37,616 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2022-11-22 02:27:37,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:27:37,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-22 02:27:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:37,618 INFO L225 Difference]: With dead ends: 122 [2022-11-22 02:27:37,618 INFO L226 Difference]: Without dead ends: 122 [2022-11-22 02:27:37,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-11-22 02:27:37,619 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 10 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:37,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 529 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:27:37,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-22 02:27:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-11-22 02:27:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 114 states have internal predecessors, (123), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:27:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 131 transitions. [2022-11-22 02:27:37,626 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 131 transitions. Word has length 21 [2022-11-22 02:27:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:37,627 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 131 transitions. [2022-11-22 02:27:37,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:27:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 131 transitions. [2022-11-22 02:27:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 02:27:37,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:37,628 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:37,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:37,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 02:27:37,836 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:27:37,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:37,836 INFO L85 PathProgramCache]: Analyzing trace with hash -208766635, now seen corresponding path program 1 times [2022-11-22 02:27:37,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:37,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888676846] [2022-11-22 02:27:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:37,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:27:37,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:37,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888676846] [2022-11-22 02:27:37,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888676846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:37,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110809365] [2022-11-22 02:27:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:37,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:37,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:37,921 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:37,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:27:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:38,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:27:38,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:27:38,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:27:38,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110809365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:38,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1406445913] [2022-11-22 02:27:38,128 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:27:38,129 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:38,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:38,129 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:38,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:38,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 02:27:38,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:38,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:27:38,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:27:38,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:27:38,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:27:38,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:27:38,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:27:38,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:27:38,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:27:38,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:27:38,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:27:38,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:27:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:27:38,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:38,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:38,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:27:38,520 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:27:38,521 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:27:38,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:38,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:27:38,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:38,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:38,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:38,762 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:38,764 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:38,887 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:27:38,887 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:27:39,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:39,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-22 02:27:39,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:27:39,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:39,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-22 02:27:39,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:39,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-22 02:27:39,202 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:39,204 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:39,207 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:39,209 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:39,263 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 02:27:39,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 02:27:39,292 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 21 [2022-11-22 02:27:39,403 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:27:39,404 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:27:39,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:27:39,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:39,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:39,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:39,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:39,672 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:39,674 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:39,676 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:39,753 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:27:39,753 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:27:39,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:39,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:27:39,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:39,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:40,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:40,018 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:40,021 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:40,023 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:27:40,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:40,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:40,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2022-11-22 02:27:40,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:40,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:40,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:40,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-22 02:27:40,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:40,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:40,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:40,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-22 02:27:40,300 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:27:40,301 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:27:40,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:40,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:40,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:40,521 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 90 for LOIs [2022-11-22 02:27:40,888 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:46,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1406445913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:46,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:46,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6, 6] total 17 [2022-11-22 02:27:46,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885869661] [2022-11-22 02:27:46,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:46,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:27:46,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:27:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:27:46,316 INFO L87 Difference]: Start difference. First operand 120 states and 131 transitions. Second operand has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:27:50,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:50,049 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2022-11-22 02:27:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:27:50,050 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-11-22 02:27:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:50,051 INFO L225 Difference]: With dead ends: 126 [2022-11-22 02:27:50,051 INFO L226 Difference]: Without dead ends: 126 [2022-11-22 02:27:50,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:27:50,052 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 2 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 1 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:50,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 336 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1136 Invalid, 10 Unknown, 0 Unchecked, 3.1s Time] [2022-11-22 02:27:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-22 02:27:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-22 02:27:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 64 states have (on average 1.984375) internal successors, (127), 119 states have internal predecessors, (127), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:27:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2022-11-22 02:27:50,057 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 23 [2022-11-22 02:27:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:50,057 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2022-11-22 02:27:50,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:27:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2022-11-22 02:27:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 02:27:50,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:50,058 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:50,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 02:27:50,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 02:27:50,275 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:27:50,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:50,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2113187364, now seen corresponding path program 1 times [2022-11-22 02:27:50,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:50,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394545997] [2022-11-22 02:27:50,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:50,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:27:50,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394545997] [2022-11-22 02:27:50,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394545997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:50,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814142153] [2022-11-22 02:27:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:50,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:50,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:50,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:50,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:27:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:50,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:27:50,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:27:50,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:50,539 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 02:27:50,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-11-22 02:27:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:27:50,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814142153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:50,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1085237956] [2022-11-22 02:27:50,568 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-22 02:27:50,569 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:50,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:50,569 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:50,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:50,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 02:27:50,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:50,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:27:50,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:27:50,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:27:50,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:27:50,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:27:50,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:27:50,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:27:50,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:27:50,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:27:50,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:27:50,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:27:50,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:27:50,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:50,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:27:50,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,847 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:27:50,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:27:50,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:27:50,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:50,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:50,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:50,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:50,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,971 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:27:50,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:27:51,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:51,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:51,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:51,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:27:51,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:51,104 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 21 [2022-11-22 02:27:51,121 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 02:27:51,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 02:27:51,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:51,183 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:27:51,183 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-22 02:27:51,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:51,214 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:27:51,215 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 02:27:51,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:51,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 02:27:51,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:51,297 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:27:51,298 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-22 02:27:51,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:51,326 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:27:51,326 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 02:27:51,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:51,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 02:27:51,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:51,442 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:27:51,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:27:51,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:51,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:27:51,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:51,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:51,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:51,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:51,561 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:27:51,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:27:51,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:51,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:27:51,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:51,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:51,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:51,758 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 21 [2022-11-22 02:27:51,771 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 02:27:51,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 02:27:51,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:51,816 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:27:51,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:27:51,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:51,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:51,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:51,852 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 94 for LOIs [2022-11-22 02:27:52,253 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:57,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2590#(and (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |#NULL.offset| 0) (not (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 02:27:57,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:57,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:57,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-11-22 02:27:57,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888126909] [2022-11-22 02:27:57,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:57,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:27:57,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:57,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:27:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=321, Unknown=1, NotChecked=0, Total=380 [2022-11-22 02:27:57,837 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:27:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:58,078 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2022-11-22 02:27:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:27:58,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-22 02:27:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:58,079 INFO L225 Difference]: With dead ends: 131 [2022-11-22 02:27:58,079 INFO L226 Difference]: Without dead ends: 131 [2022-11-22 02:27:58,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=72, Invalid=388, Unknown=2, NotChecked=0, Total=462 [2022-11-22 02:27:58,080 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 8 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:58,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 312 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:27:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-22 02:27:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2022-11-22 02:27:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 122 states have internal predecessors, (132), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:27:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2022-11-22 02:27:58,088 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 24 [2022-11-22 02:27:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:58,088 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2022-11-22 02:27:58,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:27:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2022-11-22 02:27:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 02:27:58,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:58,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:58,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-22 02:27:58,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:58,290 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:27:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2113187365, now seen corresponding path program 1 times [2022-11-22 02:27:58,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:58,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14179014] [2022-11-22 02:27:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:58,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:27:58,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:58,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14179014] [2022-11-22 02:27:58,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14179014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:58,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118938127] [2022-11-22 02:27:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:58,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:58,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:58,496 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:58,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:27:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:58,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:27:58,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:27:58,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:58,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:27:58,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-11-22 02:27:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:27:58,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118938127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:58,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [337183533] [2022-11-22 02:27:58,938 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-22 02:27:58,938 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:58,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:58,938 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:58,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:58,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:58,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:58,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 02:27:58,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:58,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:58,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:58,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:27:59,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:27:59,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:27:59,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:27:59,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:27:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:27:59,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:27:59,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:27:59,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:27:59,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:27:59,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:27:59,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:27:59,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:27:59,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:27:59,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,200 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:27:59,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:27:59,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:27:59,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:59,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:59,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:59,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:59,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,300 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:27:59,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:27:59,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:59,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:27:59,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:59,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:27:59,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:27:59,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:59,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2022-11-22 02:27:59,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:59,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:59,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-22 02:27:59,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:59,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:59,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-22 02:27:59,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,650 INFO L350 Elim1Store]: Elim1 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 260 treesize of output 238 [2022-11-22 02:27:59,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:59,677 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-22 02:27:59,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 257 [2022-11-22 02:27:59,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:59,709 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:27:59,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-22 02:27:59,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,851 INFO L350 Elim1Store]: Elim1 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 260 treesize of output 238 [2022-11-22 02:27:59,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:59,877 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-22 02:27:59,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 257 [2022-11-22 02:27:59,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:59,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:27:59,909 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:27:59,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-22 02:28:00,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:00,136 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:28:00,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:28:00,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:00,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:00,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:00,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:00,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:00,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:00,236 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:28:00,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:28:00,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:00,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:00,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:00,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:00,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:00,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:00,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:00,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:00,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:00,431 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:28:00,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:28:00,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:00,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:00,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:28:00,461 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 94 for LOIs [2022-11-22 02:28:00,817 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:28:06,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3022#(and (< (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4)) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 02:28:06,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:28:06,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:28:06,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-22 02:28:06,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891305892] [2022-11-22 02:28:06,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:28:06,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 02:28:06,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:28:06,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 02:28:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=811, Unknown=2, NotChecked=0, Total=930 [2022-11-22 02:28:06,913 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-22 02:28:07,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:07,299 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2022-11-22 02:28:07,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:28:07,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 24 [2022-11-22 02:28:07,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:07,300 INFO L225 Difference]: With dead ends: 134 [2022-11-22 02:28:07,300 INFO L226 Difference]: Without dead ends: 134 [2022-11-22 02:28:07,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=135, Invalid=919, Unknown=2, NotChecked=0, Total=1056 [2022-11-22 02:28:07,302 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 16 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:07,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 959 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:28:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-22 02:28:07,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2022-11-22 02:28:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 67 states have (on average 1.955223880597015) internal successors, (131), 122 states have internal predecessors, (131), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:28:07,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2022-11-22 02:28:07,307 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 24 [2022-11-22 02:28:07,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:07,308 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2022-11-22 02:28:07,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-22 02:28:07,308 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2022-11-22 02:28:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 02:28:07,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:07,309 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:28:07,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:28:07,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:28:07,511 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:28:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:07,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1084298849, now seen corresponding path program 1 times [2022-11-22 02:28:07,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:28:07,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023978842] [2022-11-22 02:28:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:07,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:28:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:28:07,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:28:07,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023978842] [2022-11-22 02:28:07,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023978842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:28:07,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:28:07,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:28:07,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400457712] [2022-11-22 02:28:07,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:28:07,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:28:07,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:28:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:28:07,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:28:07,620 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:28:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:07,885 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2022-11-22 02:28:07,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:28:07,886 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-22 02:28:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:07,887 INFO L225 Difference]: With dead ends: 129 [2022-11-22 02:28:07,887 INFO L226 Difference]: Without dead ends: 129 [2022-11-22 02:28:07,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:28:07,888 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 19 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:07,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 360 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:28:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-22 02:28:07,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-11-22 02:28:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 121 states have internal predecessors, (130), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:28:07,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2022-11-22 02:28:07,892 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 25 [2022-11-22 02:28:07,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:07,892 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2022-11-22 02:28:07,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:28:07,892 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2022-11-22 02:28:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 02:28:07,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:07,893 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:28:07,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 02:28:07,893 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:28:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:07,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1084298850, now seen corresponding path program 1 times [2022-11-22 02:28:07,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:28:07,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104745752] [2022-11-22 02:28:07,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:07,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:28:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:28:08,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:28:08,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104745752] [2022-11-22 02:28:08,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104745752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:28:08,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:28:08,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:28:08,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042836357] [2022-11-22 02:28:08,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:28:08,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:28:08,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:28:08,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:28:08,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:28:08,130 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:28:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:08,393 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2022-11-22 02:28:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:28:08,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-22 02:28:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:08,395 INFO L225 Difference]: With dead ends: 127 [2022-11-22 02:28:08,395 INFO L226 Difference]: Without dead ends: 127 [2022-11-22 02:28:08,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:28:08,395 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 15 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:08,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 390 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:28:08,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-22 02:28:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-11-22 02:28:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 120 states have internal predecessors, (129), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:28:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2022-11-22 02:28:08,400 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 25 [2022-11-22 02:28:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:08,400 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2022-11-22 02:28:08,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:28:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2022-11-22 02:28:08,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 02:28:08,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:08,402 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] [2022-11-22 02:28:08,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 02:28:08,402 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:28:08,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:08,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1185824603, now seen corresponding path program 1 times [2022-11-22 02:28:08,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:28:08,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530077507] [2022-11-22 02:28:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:08,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:28:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:28:08,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:28:08,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530077507] [2022-11-22 02:28:08,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530077507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:08,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046978585] [2022-11-22 02:28:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:08,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:08,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:28:08,859 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:28:08,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:28:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:09,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 02:28:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:28:09,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:09,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:09,072 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_923 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_923))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-22 02:28:09,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 02:28:09,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:09,124 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_924 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_924))) is different from true [2022-11-22 02:28:09,134 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_924 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_924))) is different from true [2022-11-22 02:28:09,149 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:28:09,150 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 18 [2022-11-22 02:28:09,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:09,288 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_925 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_925))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-22 02:28:09,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 02:28:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 15 not checked. [2022-11-22 02:28:09,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:28:09,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046978585] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:09,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [150555348] [2022-11-22 02:28:09,413 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-22 02:28:09,413 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:28:09,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:28:09,413 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:28:09,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:28:09,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 02:28:09,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:28:09,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:28:09,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:09,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:09,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:09,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:09,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:09,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:28:09,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:09,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:09,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:28:09,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:09,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:28:09,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:28:09,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:28:09,762 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:28:09,762 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:28:09,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-22 02:28:09,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-22 02:28:09,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:28:09,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:09,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-22 02:28:09,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:10,001 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:10,004 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:10,006 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:10,077 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:28:10,078 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:28:10,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:10,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:10,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:10,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:10,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:10,350 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:10,352 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:10,354 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:10,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:10,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:10,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2022-11-22 02:28:10,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:10,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:10,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:10,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-22 02:28:10,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:10,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:10,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:10,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-22 02:28:10,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:10,593 INFO L350 Elim1Store]: Elim1 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 260 treesize of output 238 [2022-11-22 02:28:10,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:10,630 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:28:10,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-22 02:28:10,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:10,661 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-22 02:28:10,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-22 02:28:10,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:10,893 INFO L350 Elim1Store]: Elim1 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 260 treesize of output 238 [2022-11-22 02:28:10,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:10,924 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:28:10,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-22 02:28:10,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:10,952 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-22 02:28:10,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-22 02:28:11,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:11,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:11,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:11,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:11,149 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:28:11,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:11,165 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:28:11,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:28:11,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:11,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:11,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:11,304 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:11,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:11,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:28:11,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:28:11,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:11,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:11,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:11,347 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:11,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:11,368 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:11,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:11,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:11,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:11,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:11,471 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:11,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:11,489 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:11,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:11,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:28:11,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:28:11,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:11,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:11,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:11,535 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:11,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:11,737 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:28:11,738 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:28:11,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:11,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:11,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:11,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:11,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:11,964 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:11,966 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:11,968 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:12,045 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:28:12,046 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:28:12,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:12,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:12,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:12,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:12,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:12,286 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:12,288 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:12,290 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:12,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:12,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:12,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:12,430 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:28:12,431 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:28:12,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:12,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:12,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:28:12,591 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 13 for LOIs [2022-11-22 02:28:12,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:12,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:28:12,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:12,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:12,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:12,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:28:12,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:12,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:12,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:12,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:12,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:12,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:12,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:12,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:28:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:12,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:12,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:12,677 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:28:17,332 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3969#(and (= |ULTIMATE.start_dll_circular_append_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= (select |#length| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 12) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 1) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (not (= (select |#valid| |ULTIMATE.start_dll_circular_append_~head#1.base|) 1)) (= |ULTIMATE.start_dll_circular_append_~head#1.base| |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (= 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0)) (= |ULTIMATE.start_dll_circular_append_~data#1| (select (select |#memory_int| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 8)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (not (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| 0)) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0) 0) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= |ULTIMATE.start_dll_circular_append_#in~data#1| |ULTIMATE.start_dll_circular_append_~data#1|) (< |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~uneq~0#1| |ULTIMATE.start_dll_circular_append_#in~data#1|) (= |ULTIMATE.start_dll_circular_append_~head#1.offset| |ULTIMATE.start_dll_circular_append_#in~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 02:28:17,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:28:17,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:28:17,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-11-22 02:28:17,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452397152] [2022-11-22 02:28:17,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:28:17,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:28:17,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:28:17,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:28:17,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1211, Unknown=4, NotChecked=292, Total=1640 [2022-11-22 02:28:17,335 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 20 states, 14 states have (on average 3.642857142857143) internal successors, (51), 17 states have internal predecessors, (51), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-22 02:28:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:17,963 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2022-11-22 02:28:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:28:17,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 3.642857142857143) internal successors, (51), 17 states have internal predecessors, (51), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 34 [2022-11-22 02:28:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:17,964 INFO L225 Difference]: With dead ends: 136 [2022-11-22 02:28:17,964 INFO L226 Difference]: Without dead ends: 136 [2022-11-22 02:28:17,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=161, Invalid=1411, Unknown=4, NotChecked=316, Total=1892 [2022-11-22 02:28:17,966 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 372 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 509 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:17,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 290 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 487 Invalid, 0 Unknown, 509 Unchecked, 0.5s Time] [2022-11-22 02:28:17,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-22 02:28:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 119. [2022-11-22 02:28:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 67 states have (on average 1.8059701492537314) internal successors, (121), 112 states have internal predecessors, (121), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:28:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2022-11-22 02:28:17,970 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 34 [2022-11-22 02:28:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:17,971 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2022-11-22 02:28:17,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 3.642857142857143) internal successors, (51), 17 states have internal predecessors, (51), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-22 02:28:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2022-11-22 02:28:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 02:28:17,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:17,972 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] [2022-11-22 02:28:17,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:28:18,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 02:28:18,179 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:28:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1185824604, now seen corresponding path program 1 times [2022-11-22 02:28:18,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:28:18,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040102607] [2022-11-22 02:28:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:18,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:28:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:28:18,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:28:18,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040102607] [2022-11-22 02:28:18,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040102607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:18,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925126423] [2022-11-22 02:28:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:18,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:18,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:28:18,799 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:28:18,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:28:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:18,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:28:18,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:28:19,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:19,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:19,038 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1102 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1102) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-22 02:28:19,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:19,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 02:28:19,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:19,098 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1103 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1103) |c_#length|)))) is different from true [2022-11-22 02:28:19,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:19,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 02:28:19,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:19,208 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1104 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1104))))) is different from true [2022-11-22 02:28:19,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:19,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 02:28:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 15 not checked. [2022-11-22 02:28:19,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:28:21,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925126423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:21,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127513655] [2022-11-22 02:28:21,386 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-22 02:28:21,386 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:28:21,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:28:21,387 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:28:21,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:28:21,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 02:28:21,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:28:21,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:28:21,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:21,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:21,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:21,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:21,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:21,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:28:21,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:21,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:21,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:28:21,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:21,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:28:21,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:28:21,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:28:21,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,637 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:28:21,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:28:21,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:21,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:21,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:21,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:21,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:21,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,729 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:28:21,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:28:21,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:21,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:21,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:21,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:21,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:21,879 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 02:28:21,895 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 21 [2022-11-22 02:28:21,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 02:28:21,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:21,953 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:28:21,953 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 02:28:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 02:28:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:21,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:22,003 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:28:22,003 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-22 02:28:22,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:22,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 02:28:22,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:22,073 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:28:22,074 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-22 02:28:22,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:22,110 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:28:22,111 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 02:28:22,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:22,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:22,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:22,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:22,219 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:28:22,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:22,236 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:28:22,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:28:22,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:22,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:22,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:22,437 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:22,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:22,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:22,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:22,458 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:22,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:22,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:28:22,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:28:22,504 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:22,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:22,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:22,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:22,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:22,634 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:22,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:22,652 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:22,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:22,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:28:22,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:28:22,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:22,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:22,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:22,696 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:22,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:22,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:22,779 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:28:22,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:28:22,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:22,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:22,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:22,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:22,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:22,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:22,877 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:28:22,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:28:22,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:22,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:22,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:22,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:22,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:23,020 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 02:28:23,031 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 21 [2022-11-22 02:28:23,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 02:28:23,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:23,072 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:28:23,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:28:23,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:23,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:23,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:28:23,108 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 21 for LOIs [2022-11-22 02:28:23,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:28:23,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:23,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:23,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:23,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:23,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:23,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:23,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:28:23,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:23,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:23,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:28:23,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:23,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:23,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:23,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:23,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:23,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:23,237 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:28:26,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4378#(and (<= 0 |ULTIMATE.start_dll_circular_append_~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.offset|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= |ULTIMATE.start_dll_circular_append_~data#1| 5) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 5 |ULTIMATE.start_dll_circular_append_~data#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_append_~head#1.base|) (<= |ULTIMATE.start_dll_circular_append_#in~head#1.offset| 0) (<= 5 |ULTIMATE.start_dll_circular_append_#in~data#1|) (< (select |#length| |ULTIMATE.start_dll_circular_append_~head#1.base|) (+ |ULTIMATE.start_dll_circular_append_~head#1.offset| 4)) (<= |ULTIMATE.start_dll_circular_append_#in~data#1| 5) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 02:28:26,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:28:26,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:28:26,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2022-11-22 02:28:26,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924792942] [2022-11-22 02:28:26,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:28:26,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 02:28:26,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:28:26,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 02:28:26,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1141, Unknown=3, NotChecked=210, Total=1482 [2022-11-22 02:28:26,738 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 18 states, 12 states have (on average 4.25) internal successors, (51), 15 states have internal predecessors, (51), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-22 02:28:27,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:27,209 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2022-11-22 02:28:27,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:28:27,210 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 4.25) internal successors, (51), 15 states have internal predecessors, (51), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 34 [2022-11-22 02:28:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:27,211 INFO L225 Difference]: With dead ends: 128 [2022-11-22 02:28:27,211 INFO L226 Difference]: Without dead ends: 128 [2022-11-22 02:28:27,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=156, Invalid=1335, Unknown=3, NotChecked=228, Total=1722 [2022-11-22 02:28:27,212 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 437 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:27,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 152 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 323 Invalid, 0 Unknown, 354 Unchecked, 0.4s Time] [2022-11-22 02:28:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-22 02:28:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2022-11-22 02:28:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 67 states have (on average 1.6865671641791045) internal successors, (113), 104 states have internal predecessors, (113), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:28:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2022-11-22 02:28:27,216 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 34 [2022-11-22 02:28:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:27,217 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2022-11-22 02:28:27,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 4.25) internal successors, (51), 15 states have internal predecessors, (51), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-22 02:28:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2022-11-22 02:28:27,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 02:28:27,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:27,218 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:28:27,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:28:27,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:27,418 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:28:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:27,419 INFO L85 PathProgramCache]: Analyzing trace with hash -217032786, now seen corresponding path program 1 times [2022-11-22 02:28:27,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:28:27,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020828101] [2022-11-22 02:28:27,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:27,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:28:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:28:27,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:28:27,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020828101] [2022-11-22 02:28:27,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020828101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:27,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060434514] [2022-11-22 02:28:27,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:27,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:27,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:28:27,549 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:28:27,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:28:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:27,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:28:27,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:28:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:28:27,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:28:27,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060434514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:28:27,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:28:27,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-22 02:28:27,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071670371] [2022-11-22 02:28:27,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:28:27,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:28:27,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:28:27,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:28:27,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:28:27,780 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:28:27,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:27,811 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2022-11-22 02:28:27,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:28:27,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-11-22 02:28:27,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:27,813 INFO L225 Difference]: With dead ends: 99 [2022-11-22 02:28:27,813 INFO L226 Difference]: Without dead ends: 99 [2022-11-22 02:28:27,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:28:27,815 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 81 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:27,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 104 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:28:27,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-22 02:28:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-22 02:28:27,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.65) internal successors, (99), 93 states have internal predecessors, (99), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:28:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2022-11-22 02:28:27,819 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 34 [2022-11-22 02:28:27,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:27,820 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2022-11-22 02:28:27,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:28:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2022-11-22 02:28:27,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 02:28:27,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:27,824 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] [2022-11-22 02:28:27,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:28:28,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:28:28,041 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:28:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:28,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1411110620, now seen corresponding path program 1 times [2022-11-22 02:28:28,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:28:28,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814993094] [2022-11-22 02:28:28,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:28,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:28:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:28:28,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:28:28,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814993094] [2022-11-22 02:28:28,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814993094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:28:28,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:28:28,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:28:28,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306040039] [2022-11-22 02:28:28,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:28:28,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:28:28,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:28:28,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:28:28,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:28:28,170 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand has 6 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:28:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:28,367 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-11-22 02:28:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:28:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-11-22 02:28:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:28,368 INFO L225 Difference]: With dead ends: 112 [2022-11-22 02:28:28,368 INFO L226 Difference]: Without dead ends: 112 [2022-11-22 02:28:28,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:28:28,369 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 69 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:28,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 186 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:28:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-22 02:28:28,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 95. [2022-11-22 02:28:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 89 states have internal predecessors, (95), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:28:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2022-11-22 02:28:28,372 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 36 [2022-11-22 02:28:28,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:28,373 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2022-11-22 02:28:28,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:28:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2022-11-22 02:28:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 02:28:28,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:28,373 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] [2022-11-22 02:28:28,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 02:28:28,374 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:28:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:28,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1411110621, now seen corresponding path program 1 times [2022-11-22 02:28:28,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:28:28,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482460735] [2022-11-22 02:28:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:28,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:28:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 02:28:28,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:28:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482460735] [2022-11-22 02:28:28,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482460735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:28:28,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:28:28,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:28:28,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937018846] [2022-11-22 02:28:28,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:28:28,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:28:28,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:28:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:28:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:28:28,608 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:28:28,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:28,776 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2022-11-22 02:28:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:28:28,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-11-22 02:28:28,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:28,778 INFO L225 Difference]: With dead ends: 91 [2022-11-22 02:28:28,778 INFO L226 Difference]: Without dead ends: 91 [2022-11-22 02:28:28,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:28:28,778 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 68 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:28,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 205 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:28:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-22 02:28:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-22 02:28:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 85 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:28:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2022-11-22 02:28:28,781 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 36 [2022-11-22 02:28:28,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:28,781 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2022-11-22 02:28:28,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:28:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2022-11-22 02:28:28,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 02:28:28,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:28,785 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] [2022-11-22 02:28:28,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 02:28:28,785 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:28:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash 794767205, now seen corresponding path program 1 times [2022-11-22 02:28:28,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:28:28,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811342929] [2022-11-22 02:28:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:28,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:28:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:28:29,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:28:29,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811342929] [2022-11-22 02:28:29,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811342929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:29,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64728485] [2022-11-22 02:28:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:29,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:29,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:28:29,537 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:28:29,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:28:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:29,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-22 02:28:29,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:28:29,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-11-22 02:28:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:30,127 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-22 02:28:30,140 INFO L321 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2022-11-22 02:28:30,140 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 13 [2022-11-22 02:28:30,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-22 02:28:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:28:30,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:28:30,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64728485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:28:30,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:28:30,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 21 [2022-11-22 02:28:30,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096850297] [2022-11-22 02:28:30,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:28:30,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:28:30,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:28:30,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:28:30,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=396, Unknown=1, NotChecked=0, Total=462 [2022-11-22 02:28:30,253 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:28:30,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:30,819 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2022-11-22 02:28:30,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:28:30,820 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-11-22 02:28:30,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:30,821 INFO L225 Difference]: With dead ends: 107 [2022-11-22 02:28:30,821 INFO L226 Difference]: Without dead ends: 107 [2022-11-22 02:28:30,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=534, Unknown=1, NotChecked=0, Total=650 [2022-11-22 02:28:30,822 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 175 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 12 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:30,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 210 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 354 Invalid, 20 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:28:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-22 02:28:30,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 90. [2022-11-22 02:28:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.5) internal successors, (90), 84 states have internal predecessors, (90), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:28:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2022-11-22 02:28:30,825 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 37 [2022-11-22 02:28:30,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:30,825 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2022-11-22 02:28:30,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:28:30,825 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2022-11-22 02:28:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 02:28:30,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:30,826 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] [2022-11-22 02:28:30,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:28:31,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 02:28:31,027 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:28:31,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:31,027 INFO L85 PathProgramCache]: Analyzing trace with hash 794767206, now seen corresponding path program 1 times [2022-11-22 02:28:31,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:28:31,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659090515] [2022-11-22 02:28:31,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:31,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:28:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:28:32,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:28:32,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659090515] [2022-11-22 02:28:32,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659090515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:32,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845378153] [2022-11-22 02:28:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:32,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:32,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:28:32,471 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:28:32,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:28:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:32,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-22 02:28:32,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:28:32,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:32,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:33,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 02:28:33,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:33,435 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1790 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1790) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1795 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1795) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_1796 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1796))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-22 02:28:33,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:33,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 02:28:33,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:33,456 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 25 [2022-11-22 02:28:33,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:33,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:28:33,472 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-22 02:28:33,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:28:33,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:33,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-22 02:28:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-22 02:28:33,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:28:34,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845378153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:34,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [664796710] [2022-11-22 02:28:34,931 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 02:28:34,931 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:28:34,932 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:28:34,932 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:28:34,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:28:34,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:34,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:34,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 02:28:34,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:34,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:28:34,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:28:34,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:34,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:34,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:35,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:35,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:35,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:35,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:28:35,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:28:35,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:35,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:35,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:28:35,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:28:35,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:28:35,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,174 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:28:35,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:28:35,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:35,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:35,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:35,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:35,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:35,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,278 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:28:35,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:28:35,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:35,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:35,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:35,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:35,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:35,396 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 02:28:35,409 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 21 [2022-11-22 02:28:35,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 02:28:35,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:35,472 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:28:35,472 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-22 02:28:35,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:35,500 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:28:35,500 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 02:28:35,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 02:28:35,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:35,594 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:28:35,595 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 02:28:35,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:35,622 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:28:35,622 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-22 02:28:35,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 02:28:35,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:35,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:35,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:35,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,744 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:28:35,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,761 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:28:35,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:28:35,882 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:35,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:35,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:35,908 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:35,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:35,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:28:35,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:28:35,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:35,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:35,974 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:35,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:36,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:36,103 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:36,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:36,121 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:36,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:36,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:28:36,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:28:36,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:36,175 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:36,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:36,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,480 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:28:36,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:28:36,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:36,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:36,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:36,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:36,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:36,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,585 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:28:36,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:28:36,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:36,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:36,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:36,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:36,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:36,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:36,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:36,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:36,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,799 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:28:36,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:28:36,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:28:36,834 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 18 for LOIs [2022-11-22 02:28:36,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:36,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:28:36,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:36,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:36,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:36,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:36,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:28:36,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:36,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:28:36,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:36,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:36,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:36,931 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:28:44,656 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5841#(and (= |ULTIMATE.start_dll_circular_append_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= (select |#length| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 12) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 1) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start_dll_circular_append_#t~mem11#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (<= |ULTIMATE.start_dll_circular_append_~data#1| 5) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 5 |ULTIMATE.start_dll_circular_append_~data#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (or (not (<= (+ |ULTIMATE.start_dll_circular_append_#t~mem11#1.offset| 8) (select |#length| |ULTIMATE.start_dll_circular_append_#t~mem11#1.base|))) (not (<= 0 (+ |ULTIMATE.start_dll_circular_append_#t~mem11#1.offset| 4)))) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~head#1.base|) 1) (<= |#NULL.offset| 0) (<= 5 |ULTIMATE.start_dll_circular_append_#in~data#1|) (= |ULTIMATE.start_dll_circular_append_~head#1.base| |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (= 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0)) (<= |ULTIMATE.start_dll_circular_append_#in~data#1| 5) (<= 0 |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_~data#1| (select (select |#memory_int| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 8)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) 0))) (not (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| 0)) (= |ULTIMATE.start_main_~len~0#1| 2) (<= (+ |ULTIMATE.start_dll_circular_append_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_append_~head#1.base|)) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (<= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0) 0) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 0 |#NULL.offset|) (< |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~uneq~0#1| |ULTIMATE.start_dll_circular_append_#in~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_~head#1.offset| |ULTIMATE.start_dll_circular_append_#in~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) |ULTIMATE.start_dll_circular_append_#t~mem11#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 02:28:44,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:28:44,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:28:44,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-11-22 02:28:44,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654577559] [2022-11-22 02:28:44,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:28:44,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-22 02:28:44,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:28:44,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-22 02:28:44,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2532, Unknown=2, NotChecked=102, Total=2862 [2022-11-22 02:28:44,658 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 28 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-22 02:28:46,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:46,422 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2022-11-22 02:28:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:28:46,422 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2022-11-22 02:28:46,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:46,423 INFO L225 Difference]: With dead ends: 89 [2022-11-22 02:28:46,423 INFO L226 Difference]: Without dead ends: 89 [2022-11-22 02:28:46,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=324, Invalid=3582, Unknown=4, NotChecked=122, Total=4032 [2022-11-22 02:28:46,424 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 312 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:46,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 581 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 965 Invalid, 3 Unknown, 89 Unchecked, 1.1s Time] [2022-11-22 02:28:46,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-22 02:28:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-22 02:28:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 83 states have internal predecessors, (89), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:28:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2022-11-22 02:28:46,428 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 37 [2022-11-22 02:28:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:46,428 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2022-11-22 02:28:46,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-22 02:28:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2022-11-22 02:28:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 02:28:46,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:46,429 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, 1] [2022-11-22 02:28:46,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:28:46,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:46,636 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:28:46,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1132015517, now seen corresponding path program 1 times [2022-11-22 02:28:46,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:28:46,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611818396] [2022-11-22 02:28:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:46,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:28:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:28:48,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:28:48,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611818396] [2022-11-22 02:28:48,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611818396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:48,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962782714] [2022-11-22 02:28:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:48,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:48,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:28:48,599 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:28:48,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:28:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:48,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-22 02:28:48,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:28:49,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-22 02:28:49,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:28:49,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-11-22 02:28:49,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-11-22 02:28:49,102 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:49,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:49,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:49,328 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 02:28:49,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2022-11-22 02:28:49,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:49,342 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-11-22 02:28:49,379 INFO L321 Elim1Store]: treesize reduction 120, result has 31.4 percent of original size [2022-11-22 02:28:49,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 64 [2022-11-22 02:28:49,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-11-22 02:28:49,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:28:49,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2022-11-22 02:28:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:28:49,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:28:49,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962782714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:49,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1080539164] [2022-11-22 02:28:49,904 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 02:28:49,904 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:28:49,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:28:49,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:28:49,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:28:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:49,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:49,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 02:28:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:49,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:49,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:28:49,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:28:49,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:49,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:49,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:49,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:49,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:49,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:49,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:28:49,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:49,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:50,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:28:50,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:50,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:50,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:28:50,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:28:50,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:28:50,213 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:28:50,213 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:28:50,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:50,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:50,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:50,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:50,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:50,381 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:50,387 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:50,391 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:50,467 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:28:50,468 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:28:50,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:50,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-22 02:28:50,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-22 02:28:50,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:28:50,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-22 02:28:50,648 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:50,649 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:50,650 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:50,652 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:50,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 02:28:50,704 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 21 [2022-11-22 02:28:50,716 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 02:28:50,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:50,762 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:28:50,762 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-22 02:28:50,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 02:28:50,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:50,802 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:28:50,802 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 02:28:50,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:50,866 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:28:50,866 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 02:28:50,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 02:28:50,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:50,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:50,911 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:28:50,912 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-22 02:28:50,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:50,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:50,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:51,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:51,005 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:28:51,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:51,022 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:28:51,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:28:51,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:51,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:51,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:51,108 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:51,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:51,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:28:51,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:28:51,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:51,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:51,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:51,153 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:51,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:51,169 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:51,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:51,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:28:51,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:28:51,251 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:51,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:51,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:51,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:51,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:51,272 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:51,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:51,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:51,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:51,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:51,296 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:28:51,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:28:51,494 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:28:51,494 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:28:51,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:51,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:51,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:51,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:51,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:51,722 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:51,724 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:51,727 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:51,796 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:28:51,797 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:28:51,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:28:51,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:51,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:28:51,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:52,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:28:52,015 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:52,018 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:52,019 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:52,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:52,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:52,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:52,197 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-22 02:28:52,198 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-22 02:28:52,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:52,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:52,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:28:52,386 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 21 for LOIs [2022-11-22 02:28:52,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:28:52,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:52,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:52,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:28:52,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:28:52,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:52,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:52,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:28:52,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:52,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:28:52,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:52,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:52,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:52,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:28:52,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:52,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:52,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:28:52,483 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:29:00,335 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6226#(and (= |ULTIMATE.start_dll_circular_append_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) 1) (= |ULTIMATE.start_dll_circular_append_~last~1#1.base| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)))) (= (select |#length| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 12) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 1) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|))) |ULTIMATE.start_dll_circular_append_~last~1#1.offset|) (<= (+ 8 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~head#1.base|) 1) (= |ULTIMATE.start_dll_circular_append_~head#1.base| |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (= 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0)) (<= 0 (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|))) (= |ULTIMATE.start_dll_circular_append_~data#1| (select (select |#memory_int| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 8)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) 0))) (not (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| 0)) (= |ULTIMATE.start_main_~len~0#1| 2) (<= (+ |ULTIMATE.start_dll_circular_append_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_append_~head#1.base|)) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0) 0) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= |ULTIMATE.start_dll_circular_append_#in~data#1| |ULTIMATE.start_dll_circular_append_~data#1|) (< |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~uneq~0#1| |ULTIMATE.start_dll_circular_append_#in~data#1|) (not (= (select |#valid| |ULTIMATE.start_dll_circular_append_~last~1#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_~head#1.offset| |ULTIMATE.start_dll_circular_append_#in~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 02:29:00,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:29:00,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:29:00,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2022-11-22 02:29:00,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580153119] [2022-11-22 02:29:00,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:29:00,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-22 02:29:00,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:00,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-22 02:29:00,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2848, Unknown=0, NotChecked=0, Total=3080 [2022-11-22 02:29:00,337 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 29 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 27 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-22 02:29:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:02,967 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2022-11-22 02:29:02,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 02:29:02,968 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 27 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2022-11-22 02:29:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:02,969 INFO L225 Difference]: With dead ends: 148 [2022-11-22 02:29:02,969 INFO L226 Difference]: Without dead ends: 148 [2022-11-22 02:29:02,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=411, Invalid=4419, Unknown=0, NotChecked=0, Total=4830 [2022-11-22 02:29:02,971 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 491 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:02,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 794 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1300 Invalid, 2 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 02:29:02,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-22 02:29:02,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 88. [2022-11-22 02:29:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 82 states have internal predecessors, (88), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:29:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-11-22 02:29:02,975 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 38 [2022-11-22 02:29:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:02,976 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-11-22 02:29:02,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 27 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-22 02:29:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-11-22 02:29:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 02:29:02,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:02,977 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, 1] [2022-11-22 02:29:02,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:29:03,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:29:03,183 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:29:03,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:03,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1132015516, now seen corresponding path program 1 times [2022-11-22 02:29:03,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:03,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744947876] [2022-11-22 02:29:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:03,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:06,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:06,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744947876] [2022-11-22 02:29:06,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744947876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:29:06,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554208332] [2022-11-22 02:29:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:06,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:29:06,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:29:06,053 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:29:06,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:29:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:06,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-22 02:29:06,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:06,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:29:06,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-22 02:29:06,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-22 02:29:06,892 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-22 02:29:06,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 44 [2022-11-22 02:29:06,908 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-22 02:29:06,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 25 [2022-11-22 02:29:06,918 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:06,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:07,161 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_2184 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2184) |c_#memory_$Pointer$.base|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_2179 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_2179) |c_#length|)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_2185 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2185))))) is different from true [2022-11-22 02:29:07,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:07,194 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 02:29:07,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 83 [2022-11-22 02:29:07,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:07,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:07,205 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 02:29:07,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 71 [2022-11-22 02:29:07,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:07,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2022-11-22 02:29:07,231 INFO L321 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2022-11-22 02:29:07,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 34 treesize of output 36 [2022-11-22 02:29:07,400 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-22 02:29:07,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 50 [2022-11-22 02:29:07,410 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-22 02:29:07,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2022-11-22 02:29:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-22 02:29:07,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:29:07,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554208332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:29:07,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896022566] [2022-11-22 02:29:07,904 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 02:29:07,904 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:29:07,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:29:07,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:29:07,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:29:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:07,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:07,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 02:29:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:07,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:07,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:29:07,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:29:07,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:29:07,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:07,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:29:07,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:07,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:07,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:29:08,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:29:08,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:29:08,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:29:08,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:29:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:29:08,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:29:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:29:08,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:29:08,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,177 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:29:08,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:29:08,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:08,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:29:08,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:08,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:08,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:08,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,273 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:29:08,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:29:08,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:08,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:08,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:08,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:29:08,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:08,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:08,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2022-11-22 02:29:08,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:08,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:08,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-22 02:29:08,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:08,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:08,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-22 02:29:08,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,546 INFO L350 Elim1Store]: Elim1 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 260 treesize of output 238 [2022-11-22 02:29:08,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:08,589 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-22 02:29:08,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 257 [2022-11-22 02:29:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:08,623 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:29:08,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-22 02:29:08,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,763 INFO L350 Elim1Store]: Elim1 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 260 treesize of output 238 [2022-11-22 02:29:08,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:08,792 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:29:08,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-22 02:29:08,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:08,819 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-22 02:29:08,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-22 02:29:09,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:09,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:29:09,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:09,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:29:09,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,081 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:29:09,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,102 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:29:09,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:09,191 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:09,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:29:09,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:29:09,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:29:09,242 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:09,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:09,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:09,264 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:09,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:29:09,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:09,352 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:09,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:29:09,373 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:29:09,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:29:09,394 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:09,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:09,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:09,422 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:09,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:29:09,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,559 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:29:09,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:29:09,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:09,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:09,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:09,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:29:09,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:09,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,653 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:29:09,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:29:09,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:09,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:09,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:09,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:09,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:29:09,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:29:09,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:09,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:09,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,826 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:29:09,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:29:09,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:29:09,864 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 13 for LOIs [2022-11-22 02:29:09,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:29:09,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:29:09,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:29:09,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:09,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:09,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:29:09,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:29:09,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:29:09,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:29:09,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:09,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:29:09,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:29:09,951 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:29:16,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6692#(and (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) 1) (= |ULTIMATE.start_dll_circular_append_~last~1#1.base| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)))) (<= 0 |ULTIMATE.start_dll_circular_append_~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.offset|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|))) |ULTIMATE.start_dll_circular_append_~last~1#1.offset|) (<= |ULTIMATE.start_dll_circular_append_~data#1| 5) (<= (+ 8 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|))) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 5 |ULTIMATE.start_dll_circular_append_~data#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_append_~head#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~head#1.base|) 1) (<= 0 |ULTIMATE.start_dll_circular_append_~head#1.base|) (<= |ULTIMATE.start_dll_circular_append_#in~head#1.offset| 0) (or (not (<= (+ |ULTIMATE.start_dll_circular_append_~last~1#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_append_~last~1#1.base|))) (not (<= 0 |ULTIMATE.start_dll_circular_append_~last~1#1.offset|))) (<= 5 |ULTIMATE.start_dll_circular_append_#in~data#1|) (<= |ULTIMATE.start_dll_circular_append_#in~data#1| 5) (<= 0 (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|))) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) 0))) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= (+ |ULTIMATE.start_dll_circular_append_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_append_~head#1.base|)) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 02:29:16,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:29:16,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:29:16,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 39 [2022-11-22 02:29:16,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820933826] [2022-11-22 02:29:16,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:29:16,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-22 02:29:16,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:16,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-22 02:29:16,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=4150, Unknown=2, NotChecked=130, Total=4556 [2022-11-22 02:29:16,326 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 40 states, 31 states have (on average 2.064516129032258) internal successors, (64), 35 states have internal predecessors, (64), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:29:19,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:19,948 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2022-11-22 02:29:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 02:29:19,949 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 31 states have (on average 2.064516129032258) internal successors, (64), 35 states have internal predecessors, (64), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2022-11-22 02:29:19,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:19,950 INFO L225 Difference]: With dead ends: 132 [2022-11-22 02:29:19,950 INFO L226 Difference]: Without dead ends: 132 [2022-11-22 02:29:19,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=419, Invalid=6063, Unknown=2, NotChecked=158, Total=6642 [2022-11-22 02:29:19,953 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 224 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 2314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:19,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1320 Invalid, 2314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2199 Invalid, 2 Unknown, 88 Unchecked, 2.2s Time] [2022-11-22 02:29:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-22 02:29:19,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 87. [2022-11-22 02:29:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.45) internal successors, (87), 81 states have internal predecessors, (87), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:29:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2022-11-22 02:29:19,957 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 38 [2022-11-22 02:29:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:19,957 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2022-11-22 02:29:19,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 31 states have (on average 2.064516129032258) internal successors, (64), 35 states have internal predecessors, (64), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:29:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2022-11-22 02:29:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 02:29:19,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:19,958 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, 1, 1, 1, 1] [2022-11-22 02:29:19,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-22 02:29:20,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-22 02:29:20,165 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:29:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:20,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1434032734, now seen corresponding path program 1 times [2022-11-22 02:29:20,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:20,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113628486] [2022-11-22 02:29:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:20,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:29:20,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:20,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113628486] [2022-11-22 02:29:20,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113628486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:20,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:20,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 02:29:20,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429491484] [2022-11-22 02:29:20,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:20,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:29:20,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:20,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:29:20,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:29:20,470 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 9 states, 6 states have (on average 4.666666666666667) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:29:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:20,776 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2022-11-22 02:29:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:29:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 4.666666666666667) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-11-22 02:29:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:20,777 INFO L225 Difference]: With dead ends: 147 [2022-11-22 02:29:20,777 INFO L226 Difference]: Without dead ends: 147 [2022-11-22 02:29:20,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:29:20,778 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 230 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:20,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 242 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:29:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-22 02:29:20,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 89. [2022-11-22 02:29:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 83 states have internal predecessors, (90), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:29:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2022-11-22 02:29:20,781 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 41 [2022-11-22 02:29:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:20,782 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2022-11-22 02:29:20,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 4.666666666666667) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:29:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2022-11-22 02:29:20,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 02:29:20,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:20,782 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, 1, 1, 1, 1] [2022-11-22 02:29:20,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-22 02:29:20,782 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:29:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:20,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1434032733, now seen corresponding path program 1 times [2022-11-22 02:29:20,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:20,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135682858] [2022-11-22 02:29:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:20,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:29:21,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:21,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135682858] [2022-11-22 02:29:21,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135682858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:21,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:21,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-22 02:29:21,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896150527] [2022-11-22 02:29:21,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:21,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:29:21,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:21,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:29:21,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:29:21,376 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 13 states, 9 states have (on average 3.888888888888889) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:29:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:21,748 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2022-11-22 02:29:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:29:21,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 3.888888888888889) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-11-22 02:29:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:21,749 INFO L225 Difference]: With dead ends: 133 [2022-11-22 02:29:21,749 INFO L226 Difference]: Without dead ends: 133 [2022-11-22 02:29:21,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:29:21,750 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 166 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:21,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 331 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:29:21,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-22 02:29:21,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2022-11-22 02:29:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.4153846153846155) internal successors, (92), 85 states have internal predecessors, (92), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:29:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2022-11-22 02:29:21,754 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 41 [2022-11-22 02:29:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:21,755 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2022-11-22 02:29:21,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 3.888888888888889) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:29:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2022-11-22 02:29:21,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 02:29:21,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:21,756 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, 1, 1, 1, 1, 1, 1] [2022-11-22 02:29:21,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-22 02:29:21,756 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:29:21,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash 579046992, now seen corresponding path program 1 times [2022-11-22 02:29:21,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:21,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166844979] [2022-11-22 02:29:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:21,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:29:22,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:22,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166844979] [2022-11-22 02:29:22,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166844979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:29:22,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214885460] [2022-11-22 02:29:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:22,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:29:22,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:29:22,271 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:29:22,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:29:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:22,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-22 02:29:22,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:22,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-22 02:29:22,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:22,828 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 17 [2022-11-22 02:29:22,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-22 02:29:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:29:22,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:29:23,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214885460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:29:23,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821484268] [2022-11-22 02:29:23,005 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-22 02:29:23,005 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:29:23,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:29:23,006 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:29:23,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:29:23,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 02:29:23,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:29:23,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:29:23,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:29:23,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:23,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:29:23,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:23,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:29:23,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:29:23,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:29:23,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:29:23,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:29:23,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:29:23,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:29:23,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:29:23,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:29:23,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,257 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:29:23,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:29:23,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:23,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:29:23,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:23,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:23,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:23,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,348 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:29:23,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:29:23,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:23,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:29:23,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:23,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:23,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:23,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:23,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2022-11-22 02:29:23,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:23,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:23,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-22 02:29:23,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:23,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:23,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-22 02:29:23,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,614 INFO L350 Elim1Store]: Elim1 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 260 treesize of output 238 [2022-11-22 02:29:23,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:23,644 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:29:23,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-22 02:29:23,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:23,672 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-22 02:29:23,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-22 02:29:23,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:23,786 INFO L350 Elim1Store]: Elim1 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 260 treesize of output 238 [2022-11-22 02:29:23,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:23,819 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:29:23,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-22 02:29:23,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:23,846 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-22 02:29:23,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-22 02:29:23,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:29:24,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:24,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:24,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,055 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:29:24,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,071 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:29:24,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:29:24,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,172 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:24,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:29:24,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:29:24,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:29:24,218 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:24,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:24,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,240 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:24,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:29:24,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,337 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:24,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:29:24,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,357 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:24,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:29:24,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:29:24,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:29:24,406 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:24,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:24,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,538 INFO L350 Elim1Store]: Elim1 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 210 treesize of output 190 [2022-11-22 02:29:24,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,577 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:24,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 211 treesize of output 201 [2022-11-22 02:29:24,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,606 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:24,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 203 treesize of output 193 [2022-11-22 02:29:24,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,683 INFO L350 Elim1Store]: Elim1 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 178 treesize of output 162 [2022-11-22 02:29:24,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,722 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-22 02:29:24,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 190 treesize of output 188 [2022-11-22 02:29:24,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,755 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 02:29:24,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 176 [2022-11-22 02:29:24,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,824 INFO L350 Elim1Store]: Elim1 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 150 treesize of output 134 [2022-11-22 02:29:24,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,874 INFO L321 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2022-11-22 02:29:24,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-22 02:29:24,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:24,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:24,914 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 02:29:24,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 33 [2022-11-22 02:29:25,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:25,101 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:29:25,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:29:25,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:25,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:25,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:25,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:25,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:29:25,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:25,192 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:29:25,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:29:25,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:25,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:25,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:25,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:29:25,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:25,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:25,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:29:25,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:25,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:25,379 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:29:25,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:29:25,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:25,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:25,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:29:25,418 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2022-11-22 02:29:25,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:29:25,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:29:25,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:25,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:29:25,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:25,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:29:25,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:25,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:29:25,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:25,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:29:25,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:25,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:25,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:29:25,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:25,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:25,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:29:25,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:29:25,493 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:29:33,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7652#(and (= |ULTIMATE.start_dll_circular_append_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset|)) (= (select |#length| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 12) (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) (+ |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| 4))) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= (select |#valid| |ULTIMATE.start_main_~ptr~0#1.base|) 1) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~head#1.base|) 1) (= |ULTIMATE.start_main_~count~0#1| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) (+ |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| 4)) |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) (= |ULTIMATE.start_dll_circular_append_~head#1.base| |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (= |ULTIMATE.start_dll_circular_append_~data#1| (select (select |#memory_int| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 8)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset|) |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (not (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| 0)) (= |ULTIMATE.start_main_~len~0#1| 2) (<= (+ |ULTIMATE.start_dll_circular_append_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_append_~head#1.base|)) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= |ULTIMATE.start_dll_circular_append_#in~data#1| |ULTIMATE.start_dll_circular_append_~data#1|) (< |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~uneq~0#1| |ULTIMATE.start_dll_circular_append_#in~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_~head#1.offset| |ULTIMATE.start_dll_circular_append_#in~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 02:29:33,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:29:33,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:29:33,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2022-11-22 02:29:33,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494044414] [2022-11-22 02:29:33,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:29:33,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:29:33,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:33,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:29:33,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2400, Unknown=9, NotChecked=0, Total=2652 [2022-11-22 02:29:33,908 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 24 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-22 02:29:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:34,533 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-11-22 02:29:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:29:34,533 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2022-11-22 02:29:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:34,534 INFO L225 Difference]: With dead ends: 83 [2022-11-22 02:29:34,534 INFO L226 Difference]: Without dead ends: 83 [2022-11-22 02:29:34,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=324, Invalid=3089, Unknown=9, NotChecked=0, Total=3422 [2022-11-22 02:29:34,536 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 212 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:34,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 574 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:29:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-22 02:29:34,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-22 02:29:34,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 77 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:29:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2022-11-22 02:29:34,539 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 43 [2022-11-22 02:29:34,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:34,539 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2022-11-22 02:29:34,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-22 02:29:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2022-11-22 02:29:34,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 02:29:34,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:34,540 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, 1, 1, 1, 1, 1, 1] [2022-11-22 02:29:34,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-22 02:29:34,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-22 02:29:34,743 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:29:34,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:34,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1032527148, now seen corresponding path program 1 times [2022-11-22 02:29:34,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:34,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617557334] [2022-11-22 02:29:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:34,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:29:35,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:35,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617557334] [2022-11-22 02:29:35,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617557334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:35,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:35,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-22 02:29:35,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688125650] [2022-11-22 02:29:35,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:35,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 02:29:35,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 02:29:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:29:35,560 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 15 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:29:36,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:36,195 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2022-11-22 02:29:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:29:36,195 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-11-22 02:29:36,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:36,198 INFO L225 Difference]: With dead ends: 99 [2022-11-22 02:29:36,198 INFO L226 Difference]: Without dead ends: 99 [2022-11-22 02:29:36,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:29:36,199 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 305 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:36,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 275 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:29:36,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-22 02:29:36,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2022-11-22 02:29:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 76 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:29:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2022-11-22 02:29:36,203 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 43 [2022-11-22 02:29:36,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:36,203 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2022-11-22 02:29:36,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:29:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2022-11-22 02:29:36,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 02:29:36,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:36,204 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, 1, 1, 1, 1, 1, 1] [2022-11-22 02:29:36,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-22 02:29:36,205 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:29:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1032527147, now seen corresponding path program 1 times [2022-11-22 02:29:36,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:36,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246119102] [2022-11-22 02:29:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:36,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:29:38,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246119102] [2022-11-22 02:29:38,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246119102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:38,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:38,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-22 02:29:38,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927256316] [2022-11-22 02:29:38,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:38,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 02:29:38,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:38,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 02:29:38,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:29:38,165 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 21 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:29:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:39,185 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-11-22 02:29:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 02:29:39,186 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-11-22 02:29:39,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:39,186 INFO L225 Difference]: With dead ends: 81 [2022-11-22 02:29:39,187 INFO L226 Difference]: Without dead ends: 81 [2022-11-22 02:29:39,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:29:39,188 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 387 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:39,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 331 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:29:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-22 02:29:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-22 02:29:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 75 states have internal predecessors, (80), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:29:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2022-11-22 02:29:39,204 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 43 [2022-11-22 02:29:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:39,204 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2022-11-22 02:29:39,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:29:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2022-11-22 02:29:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 02:29:39,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:39,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:29:39,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-22 02:29:39,206 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:29:39,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:39,207 INFO L85 PathProgramCache]: Analyzing trace with hash 543680643, now seen corresponding path program 1 times [2022-11-22 02:29:39,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:39,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187783285] [2022-11-22 02:29:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:39,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:29:40,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:40,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187783285] [2022-11-22 02:29:40,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187783285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:40,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:40,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-22 02:29:40,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430102361] [2022-11-22 02:29:40,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:40,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 02:29:40,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:40,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 02:29:40,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:29:40,411 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:29:41,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:41,375 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2022-11-22 02:29:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 02:29:41,383 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-11-22 02:29:41,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:41,384 INFO L225 Difference]: With dead ends: 100 [2022-11-22 02:29:41,384 INFO L226 Difference]: Without dead ends: 100 [2022-11-22 02:29:41,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:29:41,385 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 384 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:41,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 302 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:29:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-22 02:29:41,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2022-11-22 02:29:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 76 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:29:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2022-11-22 02:29:41,388 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 46 [2022-11-22 02:29:41,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:41,389 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2022-11-22 02:29:41,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:29:41,389 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2022-11-22 02:29:41,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 02:29:41,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:41,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:29:41,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-22 02:29:41,390 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-22 02:29:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:41,391 INFO L85 PathProgramCache]: Analyzing trace with hash 543680644, now seen corresponding path program 1 times [2022-11-22 02:29:41,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:41,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371542905] [2022-11-22 02:29:41,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:41,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:45,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:45,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371542905] [2022-11-22 02:29:45,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371542905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:29:45,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106568747] [2022-11-22 02:29:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:45,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:29:45,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:29:45,052 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:29:45,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57f4f76-f47b-4ada-b567-d3a1241ea0c5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 02:29:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:45,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-22 02:29:45,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:45,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:29:45,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:45,581 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:29:45,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 02:29:45,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:29:46,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 02:29:46,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:29:46,308 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 21 [2022-11-22 02:29:46,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:29:46,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:46,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:46,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:46,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 02:29:46,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:46,763 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 02:29:46,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 48 [2022-11-22 02:29:46,777 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-22 02:29:46,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:29:46,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:29:47,378 INFO L321 Elim1Store]: treesize reduction 64, result has 22.0 percent of original size [2022-11-22 02:29:47,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 84 [2022-11-22 02:29:47,399 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 02:29:47,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 48 [2022-11-22 02:29:47,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:47,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2022-11-22 02:29:47,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:47,532 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 31 [2022-11-22 02:29:47,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:47,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 02:29:47,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:47,590 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 31 [2022-11-22 02:29:47,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:47,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 02:29:47,807 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 02:29:47,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2022-11-22 02:29:47,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:47,813 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-11-22 02:29:47,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-22 02:29:47,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:47,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:29:48,137 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3178 (Array Int Int)) (v_ArrVal_3179 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_append_#t~mem14#1.base| v_ArrVal_3179) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 12) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_#t~mem14#1.base| v_ArrVal_3178) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3179 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_append_#t~mem14#1.base| v_ArrVal_3179) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)))) is different from false [2022-11-22 02:29:48,374 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3176 (Array Int Int)) (v_ArrVal_3177 (Array Int Int)) (v_ArrVal_3179 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3177) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3176) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|) v_ArrVal_3179) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8))) (forall ((v_ArrVal_3176 (Array Int Int)) (v_ArrVal_3177 (Array Int Int)) (v_ArrVal_3178 (Array Int Int)) (v_ArrVal_3179 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3176))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3177) .cse0 v_ArrVal_3179) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 12) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_3178) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2022-11-22 02:29:48,411 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3173 (Array Int Int)) (v_ArrVal_3176 (Array Int Int)) (v_ArrVal_3177 (Array Int Int)) (v_ArrVal_3179 (Array Int Int)) (v_ArrVal_3172 (Array Int Int))) (<= 0 (+ 8 (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_append_~last~1#1.base| v_ArrVal_3173) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3177) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_~last~1#1.base| v_ArrVal_3172) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3176) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|) v_ArrVal_3179) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3173 (Array Int Int)) (v_ArrVal_3176 (Array Int Int)) (v_ArrVal_3177 (Array Int Int)) (v_ArrVal_3178 (Array Int Int)) (v_ArrVal_3179 (Array Int Int)) (v_ArrVal_3172 (Array Int Int))) (let ((.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_~last~1#1.base| v_ArrVal_3172) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3176))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) (<= (+ 12 (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_append_~last~1#1.base| v_ArrVal_3173) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3177) .cse0 v_ArrVal_3179) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_3178) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2022-11-22 02:29:48,429 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_#t~mem11#1.base|) (+ |c_ULTIMATE.start_dll_circular_append_#t~mem11#1.offset| 4)))) (and (forall ((v_ArrVal_3173 (Array Int Int)) (v_ArrVal_3176 (Array Int Int)) (v_ArrVal_3177 (Array Int Int)) (v_ArrVal_3179 (Array Int Int)) (v_ArrVal_3172 (Array Int Int))) (<= 0 (+ (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3173) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3177) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3172) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3176) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|) v_ArrVal_3179) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8))) (forall ((v_ArrVal_3173 (Array Int Int)) (v_ArrVal_3176 (Array Int Int)) (v_ArrVal_3177 (Array Int Int)) (v_ArrVal_3178 (Array Int Int)) (v_ArrVal_3179 (Array Int Int)) (v_ArrVal_3172 (Array Int Int))) (let ((.cse2 (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3172) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3176))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) (<= (+ (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3173) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3177) .cse1 v_ArrVal_3179) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 12) (select |c_#length| (select (select (store .cse2 .cse1 v_ArrVal_3178) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))))) is different from false [2022-11-22 02:29:48,448 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|) 4)))) (and (forall ((v_ArrVal_3173 (Array Int Int)) (v_ArrVal_3176 (Array Int Int)) (v_ArrVal_3177 (Array Int Int)) (v_ArrVal_3178 (Array Int Int)) (v_ArrVal_3179 (Array Int Int)) (v_ArrVal_3172 (Array Int Int))) (let ((.cse2 (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3172) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3176))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) (<= (+ (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3173) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3177) .cse1 v_ArrVal_3179) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 12) (select |c_#length| (select (select (store .cse2 .cse1 v_ArrVal_3178) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) (forall ((v_ArrVal_3173 (Array Int Int)) (v_ArrVal_3176 (Array Int Int)) (v_ArrVal_3177 (Array Int Int)) (v_ArrVal_3179 (Array Int Int)) (v_ArrVal_3172 (Array Int Int))) (<= 0 (+ (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3173) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3177) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3172) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_3176) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|) v_ArrVal_3179) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8))))) is different from false [2022-11-22 02:29:48,489 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|) 4)))) (and (forall ((v_ArrVal_3173 (Array Int Int)) (v_ArrVal_3176 (Array Int Int)) (v_ArrVal_3177 (Array Int Int)) (v_ArrVal_3179 (Array Int Int)) (v_ArrVal_3172 (Array Int Int))) (<= 0 (+ (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3173) |c_ULTIMATE.start_dll_circular_append_#t~ret9#1.base| v_ArrVal_3177) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3172) |c_ULTIMATE.start_dll_circular_append_#t~ret9#1.base| v_ArrVal_3176) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|) v_ArrVal_3179) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8))) (forall ((v_ArrVal_3173 (Array Int Int)) (v_ArrVal_3176 (Array Int Int)) (v_ArrVal_3177 (Array Int Int)) (v_ArrVal_3178 (Array Int Int)) (v_ArrVal_3179 (Array Int Int)) (v_ArrVal_3172 (Array Int Int))) (let ((.cse2 (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3172) |c_ULTIMATE.start_dll_circular_append_#t~ret9#1.base| v_ArrVal_3176))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) (<= (+ (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3173) |c_ULTIMATE.start_dll_circular_append_#t~ret9#1.base| v_ArrVal_3177) .cse1 v_ArrVal_3179) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 12) (select |c_#length| (select (select (store .cse2 .cse1 v_ArrVal_3178) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))))) is different from false [2022-11-22 02:29:48,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106568747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:29:48,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [635847807] [2022-11-22 02:29:48,946 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-22 02:29:48,946 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:29:48,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:29:48,947 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:29:48,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:29:48,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:48,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:48,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 02:29:48,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:48,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:48,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:29:49,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:29:49,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:29:49,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:49,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:49,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:29:49,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:29:49,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:29:49,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 02:29:49,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:29:49,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:29:49,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-22 02:29:49,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:29:49,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-22 02:29:49,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-22 02:29:49,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,186 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:29:49,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:29:49,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:29:49,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:49,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:49,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:49,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:49,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,281 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:29:49,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:29:49,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:49,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:29:49,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:49,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:29:49,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:29:49,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 02:29:49,420 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 02:29:49,432 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 21 [2022-11-22 02:29:49,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:49,470 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:29:49,471 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-22 02:29:49,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:49,499 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:29:49,500 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 02:29:49,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 02:29:49,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:49,567 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:29:49,567 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-22 02:29:49,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:49,599 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:29:49,599 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 02:29:49,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 02:29:49,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:49,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:49,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 02:29:49,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 02:29:49,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,747 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:29:49,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,771 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-22 02:29:49,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:49,876 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:49,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:29:49,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:29:49,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:29:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:49,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:49,929 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:49,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:29:49,947 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:49,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:50,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:29:50,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-22 02:29:50,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:50,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:50,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:50,081 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:50,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:29:50,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:50,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:50,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:50,111 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:50,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-22 02:29:50,128 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:29:50,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:29:50,376 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-22 02:29:50,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 211 [2022-11-22 02:29:50,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:50,504 INFO L321 Elim1Store]: treesize reduction 127, result has 35.5 percent of original size [2022-11-22 02:29:50,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 282 treesize of output 306 [2022-11-22 02:29:50,663 INFO L321 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-11-22 02:29:50,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 287 treesize of output 322 [2022-11-22 02:30:13,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:30:13,485 INFO L173 IndexEqualityManager]: detected equality via solver