./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0 --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 d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 --- 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-e04fb08 [2022-11-16 15:53:31,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 15:53:31,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 15:53:31,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 15:53:31,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 15:53:31,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 15:53:31,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 15:53:31,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 15:53:31,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 15:53:31,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 15:53:31,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 15:53:31,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 15:53:31,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 15:53:31,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 15:53:31,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 15:53:31,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 15:53:31,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 15:53:31,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 15:53:31,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 15:53:31,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 15:53:31,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 15:53:31,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 15:53:31,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 15:53:31,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 15:53:31,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 15:53:31,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 15:53:31,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 15:53:31,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 15:53:31,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 15:53:31,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 15:53:31,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 15:53:31,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 15:53:31,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 15:53:31,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 15:53:31,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 15:53:31,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 15:53:31,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 15:53:31,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 15:53:31,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 15:53:31,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 15:53:31,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 15:53:31,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 15:53:31,194 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 15:53:31,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 15:53:31,194 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 15:53:31,195 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 15:53:31,195 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 15:53:31,196 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 15:53:31,196 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 15:53:31,196 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 15:53:31,196 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 15:53:31,197 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 15:53:31,197 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 15:53:31,197 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 15:53:31,197 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 15:53:31,197 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 15:53:31,198 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 15:53:31,198 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 15:53:31,198 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 15:53:31,198 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 15:53:31,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 15:53:31,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 15:53:31,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 15:53:31,200 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 15:53:31,200 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 15:53:31,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 15:53:31,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 15:53:31,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 15:53:31,201 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 15:53:31,201 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 15:53:31,201 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 15:53:31,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 15:53:31,202 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 15:53:31,202 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 15:53:31,202 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 15:53:31,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 15:53:31,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 15:53:31,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:53:31,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 15:53:31,203 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 15:53:31,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 15:53:31,204 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 15:53:31,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 15:53:31,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 15:53:31,204 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_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 [2022-11-16 15:53:31,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 15:53:31,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 15:53:31,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 15:53:31,535 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 15:53:31,536 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 15:53:31,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2022-11-16 15:53:31,602 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/data/794bd706f/6e8fd62f29a74305ba51d58e990118cd/FLAG43af75f05 [2022-11-16 15:53:32,130 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 15:53:32,130 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2022-11-16 15:53:32,143 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/data/794bd706f/6e8fd62f29a74305ba51d58e990118cd/FLAG43af75f05 [2022-11-16 15:53:32,424 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/data/794bd706f/6e8fd62f29a74305ba51d58e990118cd [2022-11-16 15:53:32,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 15:53:32,431 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 15:53:32,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 15:53:32,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 15:53:32,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 15:53:32,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:53:32" (1/1) ... [2022-11-16 15:53:32,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d7afb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32, skipping insertion in model container [2022-11-16 15:53:32,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:53:32" (1/1) ... [2022-11-16 15:53:32,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 15:53:32,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 15:53:32,821 WARN L229 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_5c141999-d25f-4f79-aa4a-48942a201e3b/sv-benchmarks/c/list-simple/sll2c_append_unequal.i[24587,24600] [2022-11-16 15:53:32,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:53:32,846 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 15:53:32,921 WARN L229 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_5c141999-d25f-4f79-aa4a-48942a201e3b/sv-benchmarks/c/list-simple/sll2c_append_unequal.i[24587,24600] [2022-11-16 15:53:32,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:53:32,960 INFO L208 MainTranslator]: Completed translation [2022-11-16 15:53:32,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32 WrapperNode [2022-11-16 15:53:32,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 15:53:32,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 15:53:32,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 15:53:32,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 15:53:32,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32" (1/1) ... [2022-11-16 15:53:33,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32" (1/1) ... [2022-11-16 15:53:33,040 INFO L138 Inliner]: procedures = 127, calls = 46, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 164 [2022-11-16 15:53:33,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 15:53:33,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 15:53:33,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 15:53:33,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 15:53:33,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32" (1/1) ... [2022-11-16 15:53:33,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32" (1/1) ... [2022-11-16 15:53:33,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32" (1/1) ... [2022-11-16 15:53:33,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32" (1/1) ... [2022-11-16 15:53:33,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32" (1/1) ... [2022-11-16 15:53:33,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32" (1/1) ... [2022-11-16 15:53:33,076 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32" (1/1) ... [2022-11-16 15:53:33,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32" (1/1) ... [2022-11-16 15:53:33,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 15:53:33,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 15:53:33,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 15:53:33,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 15:53:33,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32" (1/1) ... [2022-11-16 15:53:33,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:53:33,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:33,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 15:53:33,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 15:53:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 15:53:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 15:53:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-16 15:53:33,167 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-16 15:53:33,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 15:53:33,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 15:53:33,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 15:53:33,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 15:53:33,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 15:53:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 15:53:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 15:53:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 15:53:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 15:53:33,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 15:53:33,371 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 15:53:33,373 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 15:53:33,832 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 15:53:33,895 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 15:53:33,895 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 15:53:33,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:53:33 BoogieIcfgContainer [2022-11-16 15:53:33,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 15:53:33,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 15:53:33,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 15:53:33,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 15:53:33,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 03:53:32" (1/3) ... [2022-11-16 15:53:33,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779b9461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:53:33, skipping insertion in model container [2022-11-16 15:53:33,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:53:32" (2/3) ... [2022-11-16 15:53:33,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779b9461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:53:33, skipping insertion in model container [2022-11-16 15:53:33,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:53:33" (3/3) ... [2022-11-16 15:53:33,908 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_append_unequal.i [2022-11-16 15:53:33,931 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 15:53:33,931 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2022-11-16 15:53:34,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 15:53:34,044 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;@785251bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 15:53:34,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2022-11-16 15:53:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 110 states have internal predecessors, (124), 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) [2022-11-16 15:53:34,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 15:53:34,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:34,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 15:53:34,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:53:34,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash 246748118, now seen corresponding path program 1 times [2022-11-16 15:53:34,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:34,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257589500] [2022-11-16 15:53:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:34,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:34,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257589500] [2022-11-16 15:53:34,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257589500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:53:34,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:53:34,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 15:53:34,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183869775] [2022-11-16 15:53:34,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:53:34,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:53:34,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:34,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:53:34,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:53:34,359 INFO L87 Difference]: Start difference. First operand has 115 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 110 states have internal predecessors, (124), 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) [2022-11-16 15:53:34,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:34,502 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2022-11-16 15:53:34,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:53:34,520 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 [2022-11-16 15:53:34,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:34,529 INFO L225 Difference]: With dead ends: 113 [2022-11-16 15:53:34,529 INFO L226 Difference]: Without dead ends: 111 [2022-11-16 15:53:34,531 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 [2022-11-16 15:53:34,537 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 6 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:34,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 159 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:53:34,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-16 15:53:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-16 15:53:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 106 states have internal predecessors, (115), 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) [2022-11-16 15:53:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2022-11-16 15:53:34,596 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 5 [2022-11-16 15:53:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:34,596 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2022-11-16 15:53:34,597 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) [2022-11-16 15:53:34,598 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2022-11-16 15:53:34,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 15:53:34,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:34,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 15:53:34,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 15:53:34,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:53:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:34,600 INFO L85 PathProgramCache]: Analyzing trace with hash 246748119, now seen corresponding path program 1 times [2022-11-16 15:53:34,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:34,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904647240] [2022-11-16 15:53:34,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:34,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:34,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:34,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904647240] [2022-11-16 15:53:34,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904647240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:53:34,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:53:34,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 15:53:34,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370124716] [2022-11-16 15:53:34,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:53:34,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:53:34,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:34,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:53:34,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:53:34,766 INFO L87 Difference]: Start difference. First operand 111 states and 121 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) [2022-11-16 15:53:34,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:34,895 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2022-11-16 15:53:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:53:34,899 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 [2022-11-16 15:53:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:34,902 INFO L225 Difference]: With dead ends: 109 [2022-11-16 15:53:34,902 INFO L226 Difference]: Without dead ends: 109 [2022-11-16 15:53:34,907 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 [2022-11-16 15:53:34,909 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 2 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:34,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 164 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:53:34,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-16 15:53:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-11-16 15:53:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 51 states have (on average 2.215686274509804) internal successors, (113), 104 states have internal predecessors, (113), 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) [2022-11-16 15:53:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2022-11-16 15:53:34,926 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 5 [2022-11-16 15:53:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:34,926 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2022-11-16 15:53:34,927 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) [2022-11-16 15:53:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2022-11-16 15:53:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 15:53:34,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:34,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:34,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 15:53:34,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:53:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:34,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1094018592, now seen corresponding path program 1 times [2022-11-16 15:53:34,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:34,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573971728] [2022-11-16 15:53:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:34,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:35,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:35,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573971728] [2022-11-16 15:53:35,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573971728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:53:35,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:53:35,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 15:53:35,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781819227] [2022-11-16 15:53:35,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:53:35,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:53:35,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:35,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:53:35,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:53:35,101 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-16 15:53:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:35,159 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-11-16 15:53:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:53:35,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 10 [2022-11-16 15:53:35,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:35,164 INFO L225 Difference]: With dead ends: 115 [2022-11-16 15:53:35,165 INFO L226 Difference]: Without dead ends: 115 [2022-11-16 15:53:35,167 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 [2022-11-16 15:53:35,169 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 4 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:35,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 203 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:53:35,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-16 15:53:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2022-11-16 15:53:35,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 105 states have internal predecessors, (114), 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) [2022-11-16 15:53:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2022-11-16 15:53:35,191 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 10 [2022-11-16 15:53:35,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:35,192 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2022-11-16 15:53:35,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-16 15:53:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2022-11-16 15:53:35,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 15:53:35,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:35,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:35,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 15:53:35,194 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:53:35,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:35,195 INFO L85 PathProgramCache]: Analyzing trace with hash 727488831, now seen corresponding path program 1 times [2022-11-16 15:53:35,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:35,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978942369] [2022-11-16 15:53:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:35,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 15:53:35,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:35,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978942369] [2022-11-16 15:53:35,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978942369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:53:35,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:53:35,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 15:53:35,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212457036] [2022-11-16 15:53:35,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:53:35,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 15:53:35,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:35,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 15:53:35,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 15:53:35,363 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-16 15:53:35,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:35,625 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2022-11-16 15:53:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 15:53:35,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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 17 [2022-11-16 15:53:35,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:35,628 INFO L225 Difference]: With dead ends: 110 [2022-11-16 15:53:35,628 INFO L226 Difference]: Without dead ends: 110 [2022-11-16 15:53:35,628 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 [2022-11-16 15:53:35,629 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 9 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:35,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 318 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 15:53:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-16 15:53:35,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-11-16 15:53:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 52 states have (on average 2.173076923076923) internal successors, (113), 104 states have internal predecessors, (113), 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) [2022-11-16 15:53:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2022-11-16 15:53:35,635 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 17 [2022-11-16 15:53:35,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:35,635 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2022-11-16 15:53:35,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-16 15:53:35,636 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2022-11-16 15:53:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 15:53:35,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:35,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:35,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 15:53:35,637 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:53:35,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:35,650 INFO L85 PathProgramCache]: Analyzing trace with hash 727488832, now seen corresponding path program 1 times [2022-11-16 15:53:35,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:35,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357439850] [2022-11-16 15:53:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:35,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:53:36,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:36,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357439850] [2022-11-16 15:53:36,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357439850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:53:36,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:53:36,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 15:53:36,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174204210] [2022-11-16 15:53:36,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:53:36,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 15:53:36,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:36,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 15:53:36,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 15:53:36,027 INFO L87 Difference]: Start difference. First operand 109 states and 119 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) [2022-11-16 15:53:36,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:36,297 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2022-11-16 15:53:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 15:53:36,298 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 17 [2022-11-16 15:53:36,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:36,299 INFO L225 Difference]: With dead ends: 109 [2022-11-16 15:53:36,300 INFO L226 Difference]: Without dead ends: 109 [2022-11-16 15:53:36,300 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 [2022-11-16 15:53:36,301 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 7 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:36,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 342 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 15:53:36,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-16 15:53:36,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-11-16 15:53:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 103 states have internal predecessors, (112), 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) [2022-11-16 15:53:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2022-11-16 15:53:36,308 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 17 [2022-11-16 15:53:36,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:36,308 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2022-11-16 15:53:36,309 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) [2022-11-16 15:53:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2022-11-16 15:53:36,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 15:53:36,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:36,310 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:36,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 15:53:36,310 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:53:36,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:36,311 INFO L85 PathProgramCache]: Analyzing trace with hash -962684734, now seen corresponding path program 1 times [2022-11-16 15:53:36,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:36,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829228186] [2022-11-16 15:53:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:36,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:53:36,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:36,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829228186] [2022-11-16 15:53:36,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829228186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:53:36,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901187147] [2022-11-16 15:53:36,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:36,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:36,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:36,618 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:36,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 15:53:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:36,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 15:53:36,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:36,868 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 [2022-11-16 15:53:36,941 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_158 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_158))))) is different from true [2022-11-16 15:53:37,035 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 15:53:37,035 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 [2022-11-16 15:53:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-11-16 15:53:37,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:53:37,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901187147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:53:37,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [344745432] [2022-11-16 15:53:37,166 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-16 15:53:37,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:53:37,170 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:53:37,176 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:53:37,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:53:37,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,230 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 [2022-11-16 15:53:37,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,279 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 [2022-11-16 15:53:37,300 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 [2022-11-16 15:53:37,309 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 [2022-11-16 15:53:37,325 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 [2022-11-16 15:53:37,332 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 [2022-11-16 15:53:37,339 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 [2022-11-16 15:53:37,352 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 [2022-11-16 15:53:37,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,363 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 27 treesize of output 11 [2022-11-16 15:53:37,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,375 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 27 treesize of output 11 [2022-11-16 15:53:37,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,418 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 [2022-11-16 15:53:37,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,463 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 [2022-11-16 15:53:37,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,518 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 [2022-11-16 15:53:37,814 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:53:37,815 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 208 treesize of output 197 [2022-11-16 15:53:38,044 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 [2022-11-16 15:53:38,056 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 [2022-11-16 15:53:38,067 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 [2022-11-16 15:53:38,081 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 [2022-11-16 15:53:38,092 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 [2022-11-16 15:53:38,108 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:38,111 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:38,115 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:38,126 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:38,129 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:38,229 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:53:38,230 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 208 treesize of output 197 [2022-11-16 15:53:38,510 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 [2022-11-16 15:53:38,523 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 [2022-11-16 15:53:38,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-16 15:53:38,552 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 [2022-11-16 15:53:38,564 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 [2022-11-16 15:53:38,582 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:38,584 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:38,587 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:38,590 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:38,593 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:38,656 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 19 treesize of output 11 [2022-11-16 15:53:38,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:38,668 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 [2022-11-16 15:53:38,681 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 19 treesize of output 11 [2022-11-16 15:53:38,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:38,944 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 133 treesize of output 117 [2022-11-16 15:53:38,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:38,958 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 0 case distinctions, treesize of input 129 treesize of output 117 [2022-11-16 15:53:38,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:38,977 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 0 case distinctions, treesize of input 121 treesize of output 109 [2022-11-16 15:53:39,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:39,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:39,326 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 [2022-11-16 15:53:39,341 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2022-11-16 15:53:39,605 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:53:41,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1327#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 15:53:41,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:53:41,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:53:41,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2022-11-16 15:53:41,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26545293] [2022-11-16 15:53:41,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:53:41,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 15:53:41,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:41,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 15:53:41,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=433, Unknown=1, NotChecked=42, Total=552 [2022-11-16 15:53:41,913 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 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) [2022-11-16 15:53:42,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:42,256 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2022-11-16 15:53:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 15:53:42,257 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 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 19 [2022-11-16 15:53:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:42,258 INFO L225 Difference]: With dead ends: 107 [2022-11-16 15:53:42,258 INFO L226 Difference]: Without dead ends: 107 [2022-11-16 15:53:42,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=90, Invalid=513, Unknown=1, NotChecked=46, Total=650 [2022-11-16 15:53:42,259 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 2 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:42,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 401 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 355 Invalid, 0 Unknown, 120 Unchecked, 0.3s Time] [2022-11-16 15:53:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-16 15:53:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-16 15:53:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 102 states have internal predecessors, (111), 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) [2022-11-16 15:53:42,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2022-11-16 15:53:42,264 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 19 [2022-11-16 15:53:42,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:42,265 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2022-11-16 15:53:42,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 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) [2022-11-16 15:53:42,265 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2022-11-16 15:53:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 15:53:42,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:42,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:42,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:42,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:42,477 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:53:42,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:42,478 INFO L85 PathProgramCache]: Analyzing trace with hash -962684733, now seen corresponding path program 1 times [2022-11-16 15:53:42,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:42,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815026598] [2022-11-16 15:53:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:42,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:42,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:42,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815026598] [2022-11-16 15:53:42,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815026598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:53:42,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090962058] [2022-11-16 15:53:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:42,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:42,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:42,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:42,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 15:53:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 15:53:43,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:43,018 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 [2022-11-16 15:53:43,023 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 [2022-11-16 15:53:43,142 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 15:53:43,143 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 14 treesize of output 13 [2022-11-16 15:53:43,155 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:53:43,155 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 [2022-11-16 15:53:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:43,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:53:43,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090962058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:53:43,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1594138311] [2022-11-16 15:53:43,336 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-16 15:53:43,336 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:53:43,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:53:43,337 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:53:43,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:53:43,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:43,362 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 [2022-11-16 15:53:43,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:43,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:43,387 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 [2022-11-16 15:53:43,402 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 [2022-11-16 15:53:43,407 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 [2022-11-16 15:53:43,414 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 [2022-11-16 15:53:43,419 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 [2022-11-16 15:53:43,424 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 [2022-11-16 15:53:43,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:43,435 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 27 treesize of output 11 [2022-11-16 15:53:43,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:43,442 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 27 treesize of output 11 [2022-11-16 15:53:43,449 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 [2022-11-16 15:53:43,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:43,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:43,477 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 [2022-11-16 15:53:43,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:43,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:43,506 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 [2022-11-16 15:53:43,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:43,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:43,537 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 [2022-11-16 15:53:43,741 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:53:43,742 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 208 treesize of output 197 [2022-11-16 15:53:43,973 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 [2022-11-16 15:53:43,982 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 [2022-11-16 15:53:43,991 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 [2022-11-16 15:53:44,006 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 [2022-11-16 15:53:44,016 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 [2022-11-16 15:53:44,031 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:44,034 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:44,036 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:44,037 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:44,130 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:53:44,131 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 208 treesize of output 197 [2022-11-16 15:53:44,323 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 [2022-11-16 15:53:44,334 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 [2022-11-16 15:53:44,343 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 [2022-11-16 15:53:44,352 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 [2022-11-16 15:53:44,364 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 [2022-11-16 15:53:44,379 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:44,381 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:44,383 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:44,386 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:44,438 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 19 treesize of output 11 [2022-11-16 15:53:44,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:44,451 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 [2022-11-16 15:53:44,464 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 19 treesize of output 11 [2022-11-16 15:53:44,644 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 [2022-11-16 15:53:44,651 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 [2022-11-16 15:53:44,659 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 [2022-11-16 15:53:44,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:44,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:44,921 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 [2022-11-16 15:53:44,930 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2022-11-16 15:53:45,157 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:53:47,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1643#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (< (select |#length| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 4)) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 15:53:47,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:53:47,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:53:47,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2022-11-16 15:53:47,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862492691] [2022-11-16 15:53:47,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:53:47,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 15:53:47,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 15:53:47,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-11-16 15:53:47,484 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 13 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 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) [2022-11-16 15:53:48,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:48,155 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2022-11-16 15:53:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 15:53:48,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 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 19 [2022-11-16 15:53:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:48,156 INFO L225 Difference]: With dead ends: 108 [2022-11-16 15:53:48,156 INFO L226 Difference]: Without dead ends: 108 [2022-11-16 15:53:48,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-11-16 15:53:48,157 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 105 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:48,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 492 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 15:53:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-16 15:53:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-11-16 15:53:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 101 states have internal predecessors, (110), 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) [2022-11-16 15:53:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2022-11-16 15:53:48,163 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 19 [2022-11-16 15:53:48,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:48,164 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2022-11-16 15:53:48,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 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) [2022-11-16 15:53:48,164 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2022-11-16 15:53:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 15:53:48,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:48,165 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:48,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:48,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 15:53:48,371 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:53:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:48,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1903044513, now seen corresponding path program 1 times [2022-11-16 15:53:48,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:48,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139752061] [2022-11-16 15:53:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:48,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 15:53:48,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:48,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139752061] [2022-11-16 15:53:48,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139752061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:53:48,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600975377] [2022-11-16 15:53:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:48,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:48,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:48,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:48,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 15:53:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:49,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 15:53:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:49,041 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 [2022-11-16 15:53:49,050 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_353 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_353))) is different from true [2022-11-16 15:53:49,061 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_353 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_353))) is different from true [2022-11-16 15:53:49,073 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 15:53:49,074 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 [2022-11-16 15:53:49,118 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_354 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_354))) is different from true [2022-11-16 15:53:49,126 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_354 Int)) (= (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_354) |c_#valid|)) is different from true [2022-11-16 15:53:49,138 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 15:53:49,139 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 16 treesize of output 22 [2022-11-16 15:53:49,269 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2022-11-16 15:53:49,290 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 15:53:49,290 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 14 [2022-11-16 15:53:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 12 not checked. [2022-11-16 15:53:49,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:53:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 15:53:49,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600975377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:53:49,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1321673537] [2022-11-16 15:53:50,001 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-16 15:53:50,001 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:53:50,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:53:50,001 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:53:50,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:53:50,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:50,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:50,023 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 [2022-11-16 15:53:50,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:50,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:50,052 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 [2022-11-16 15:53:50,069 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 [2022-11-16 15:53:50,074 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 [2022-11-16 15:53:50,081 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 [2022-11-16 15:53:50,085 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 [2022-11-16 15:53:50,090 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 [2022-11-16 15:53:50,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:50,099 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 27 treesize of output 11 [2022-11-16 15:53:50,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:50,106 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 27 treesize of output 11 [2022-11-16 15:53:50,112 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 [2022-11-16 15:53:50,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:50,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:50,138 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 [2022-11-16 15:53:50,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:50,165 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 [2022-11-16 15:53:50,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:50,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:50,196 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 [2022-11-16 15:53:50,340 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:53:50,341 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 208 treesize of output 197 [2022-11-16 15:53:50,564 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 [2022-11-16 15:53:50,573 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 [2022-11-16 15:53:50,582 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 [2022-11-16 15:53:50,591 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 [2022-11-16 15:53:50,601 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 [2022-11-16 15:53:50,615 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:50,617 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:50,618 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:50,620 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:50,691 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:53:50,692 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 208 treesize of output 197 [2022-11-16 15:53:50,892 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 [2022-11-16 15:53:50,901 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 [2022-11-16 15:53:50,912 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 [2022-11-16 15:53:50,923 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 [2022-11-16 15:53:50,933 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 [2022-11-16 15:53:50,946 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:50,948 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:50,950 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:50,952 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:50,956 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:53:51,029 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 19 treesize of output 11 [2022-11-16 15:53:51,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:51,039 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 23 treesize of output 11 [2022-11-16 15:53:51,052 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 19 treesize of output 11 [2022-11-16 15:53:51,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:51,253 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 133 treesize of output 117 [2022-11-16 15:53:51,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:51,269 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 0 case distinctions, treesize of input 129 treesize of output 117 [2022-11-16 15:53:51,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:51,283 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 0 case distinctions, treesize of input 121 treesize of output 109 [2022-11-16 15:53:51,575 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 [2022-11-16 15:53:51,593 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 [2022-11-16 15:53:51,607 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 [2022-11-16 15:53:51,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:51,751 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:51,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:53:51,774 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 [2022-11-16 15:53:51,786 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 7 treesize of output 5 [2022-11-16 15:53:51,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:51,811 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:51,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:53:51,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:51,951 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:51,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:53:51,964 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 [2022-11-16 15:53:51,976 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 7 treesize of output 5 [2022-11-16 15:53:51,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:51,995 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:51,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:53:52,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:52,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:52,174 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 [2022-11-16 15:53:52,184 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 21 for LOIs [2022-11-16 15:53:52,192 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 [2022-11-16 15:53:52,198 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 [2022-11-16 15:53:52,213 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 [2022-11-16 15:53:52,219 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 [2022-11-16 15:53:52,225 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 [2022-11-16 15:53:52,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:52,242 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 27 treesize of output 11 [2022-11-16 15:53:52,251 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 [2022-11-16 15:53:52,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:52,259 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 27 treesize of output 11 [2022-11-16 15:53:52,261 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:53:55,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2060#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 5 |ULTIMATE.start_sll_circular_append_#in~data#1|) (<= |ULTIMATE.start_sll_circular_append_~data#1| 5) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.base|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_circular_append_#in~data#1| 5) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.base|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_append_~head#1.base|) 1)) (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_append_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (<= 5 |ULTIMATE.start_sll_circular_append_~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_sll_circular_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 15:53:55,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:53:55,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:53:55,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 29 [2022-11-16 15:53:55,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881631874] [2022-11-16 15:53:55,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:53:55,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 15:53:55,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:55,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 15:53:55,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1458, Unknown=5, NotChecked=410, Total=2070 [2022-11-16 15:53:55,279 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 26 states have internal predecessors, (56), 4 states have call successors, (8), 2 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 15:53:55,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:55,688 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2022-11-16 15:53:55,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 15:53:55,689 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 26 states have internal predecessors, (56), 4 states have call successors, (8), 2 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 27 [2022-11-16 15:53:55,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:55,690 INFO L225 Difference]: With dead ends: 125 [2022-11-16 15:53:55,690 INFO L226 Difference]: Without dead ends: 125 [2022-11-16 15:53:55,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=258, Invalid=1827, Unknown=5, NotChecked=460, Total=2550 [2022-11-16 15:53:55,692 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 111 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 719 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:55,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 499 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 141 Invalid, 0 Unknown, 719 Unchecked, 0.2s Time] [2022-11-16 15:53:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-16 15:53:55,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 101. [2022-11-16 15:53:55,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 52 states have (on average 2.019230769230769) internal successors, (105), 96 states have internal predecessors, (105), 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) [2022-11-16 15:53:55,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-11-16 15:53:55,698 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 27 [2022-11-16 15:53:55,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:55,698 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-11-16 15:53:55,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 26 states have internal predecessors, (56), 4 states have call successors, (8), 2 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 15:53:55,699 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-11-16 15:53:55,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 15:53:55,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:55,700 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:55,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:55,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:55,905 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:53:55,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:55,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1903044514, now seen corresponding path program 1 times [2022-11-16 15:53:55,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:55,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685035587] [2022-11-16 15:53:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:55,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 15:53:56,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:56,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685035587] [2022-11-16 15:53:56,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685035587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:53:56,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817082317] [2022-11-16 15:53:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:56,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:56,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:56,431 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:56,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 15:53:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:56,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-16 15:53:56,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:56,605 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 [2022-11-16 15:53:56,624 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 [2022-11-16 15:53:56,631 WARN L855 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_476 Int)) (= (store |c_old(#length)| |c_node_create_~temp~0#1.base| v_ArrVal_476) |c_#length|))) is different from true [2022-11-16 15:53:56,652 WARN L855 $PredicateComparison]: unable to prove that (and (< |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_476 Int)) (= (store |c_old(#length)| |c_node_create_#res#1.base| v_ArrVal_476) |c_#length|))) is different from true [2022-11-16 15:53:56,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:56,660 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 [2022-11-16 15:53:56,738 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 [2022-11-16 15:53:56,818 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 15:53:56,819 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 [2022-11-16 15:53:56,937 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 [2022-11-16 15:53:57,046 INFO L321 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2022-11-16 15:53:57,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 83 [2022-11-16 15:53:57,053 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 44 treesize of output 38 [2022-11-16 15:53:57,091 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 [2022-11-16 15:53:57,102 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_481 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_481))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-16 15:53:57,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,126 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 [2022-11-16 15:53:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 12 not checked. [2022-11-16 15:53:57,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:53:57,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817082317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:53:57,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290578909] [2022-11-16 15:53:57,280 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-16 15:53:57,280 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:53:57,280 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:53:57,280 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:53:57,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:53:57,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,301 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 [2022-11-16 15:53:57,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,325 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 [2022-11-16 15:53:57,340 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 [2022-11-16 15:53:57,344 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 [2022-11-16 15:53:57,351 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 [2022-11-16 15:53:57,355 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 [2022-11-16 15:53:57,359 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 11 treesize of output 7 [2022-11-16 15:53:57,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,368 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 27 treesize of output 11 [2022-11-16 15:53:57,375 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 [2022-11-16 15:53:57,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,383 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 27 treesize of output 11 [2022-11-16 15:53:57,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,408 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 [2022-11-16 15:53:57,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,436 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 [2022-11-16 15:53:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,464 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 [2022-11-16 15:53:57,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,532 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:53:57,532 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 [2022-11-16 15:53:57,597 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 [2022-11-16 15:53:57,608 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 [2022-11-16 15:53:57,625 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 [2022-11-16 15:53:57,637 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 [2022-11-16 15:53:57,649 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 [2022-11-16 15:53:57,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,676 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:53:57,677 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 [2022-11-16 15:53:57,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:53:57,724 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 [2022-11-16 15:53:57,734 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 [2022-11-16 15:53:57,747 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 [2022-11-16 15:53:57,759 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 [2022-11-16 15:53:57,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:57,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:57,876 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 250 treesize of output 234 [2022-11-16 15:53:57,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:57,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 236 [2022-11-16 15:53:57,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:57,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 252 [2022-11-16 15:53:58,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:58,123 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 [2022-11-16 15:53:58,131 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 19 treesize of output 11 [2022-11-16 15:53:58,144 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 19 treesize of output 11 [2022-11-16 15:53:58,344 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 [2022-11-16 15:53:58,354 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 [2022-11-16 15:53:58,365 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 [2022-11-16 15:53:58,449 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 7 treesize of output 5 [2022-11-16 15:53:58,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:58,465 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:58,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:53:58,479 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 [2022-11-16 15:53:58,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:58,494 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:58,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:53:58,567 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 7 treesize of output 5 [2022-11-16 15:53:58,586 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 [2022-11-16 15:53:58,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:58,602 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:58,602 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:53:58,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:58,620 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:58,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:53:58,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:58,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:58,794 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 [2022-11-16 15:53:58,809 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 13 for LOIs [2022-11-16 15:53:58,815 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 [2022-11-16 15:53:58,820 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 [2022-11-16 15:53:58,833 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 [2022-11-16 15:53:58,837 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 [2022-11-16 15:53:58,842 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 [2022-11-16 15:53:58,854 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 [2022-11-16 15:53:58,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:58,861 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 27 treesize of output 11 [2022-11-16 15:53:58,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:58,869 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 27 treesize of output 11 [2022-11-16 15:53:58,872 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:54:02,121 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2423#(and (< (select |#length| |ULTIMATE.start_sll_circular_append_~head#1.base|) (+ |ULTIMATE.start_sll_circular_append_~head#1.offset| 4)) (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 0) 0) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_append_~head#1.base| |ULTIMATE.start_sll_circular_append_#in~head#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 0) 0) (= |ULTIMATE.start_sll_circular_append_~data#1| (select (select |#memory_int| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 4)) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (= (select |#valid| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_sll_circular_append_#in~head#1.offset| |ULTIMATE.start_sll_circular_append_~head#1.offset|) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~uneq~0#1| |ULTIMATE.start_sll_circular_append_#in~data#1|) (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_sll_circular_append_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_circular_create_~head~0#1.base| |ULTIMATE.start_sll_circular_create_#res#1.base|) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.base| 0)) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_circular_append_#in~data#1| |ULTIMATE.start_sll_circular_append_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_append_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= 8 (select |#length| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_sll_circular_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (< |ULTIMATE.start_sll_circular_append_~new_last~0#1.base| |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 15:54:02,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:54:02,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:54:02,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 20 [2022-11-16 15:54:02,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792918179] [2022-11-16 15:54:02,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:54:02,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 15:54:02,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 15:54:02,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1152, Unknown=7, NotChecked=210, Total=1482 [2022-11-16 15:54:02,124 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 22 states, 15 states have (on average 2.4) internal successors, (36), 17 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 15:54:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:02,964 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2022-11-16 15:54:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 15:54:02,965 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 15 states have (on average 2.4) internal successors, (36), 17 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 27 [2022-11-16 15:54:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:02,967 INFO L225 Difference]: With dead ends: 103 [2022-11-16 15:54:02,967 INFO L226 Difference]: Without dead ends: 103 [2022-11-16 15:54:02,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=156, Invalid=1655, Unknown=7, NotChecked=252, Total=2070 [2022-11-16 15:54:02,969 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 91 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:02,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 524 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 491 Invalid, 0 Unknown, 407 Unchecked, 0.5s Time] [2022-11-16 15:54:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-16 15:54:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2022-11-16 15:54:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 91 states have internal predecessors, (100), 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) [2022-11-16 15:54:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2022-11-16 15:54:02,974 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 27 [2022-11-16 15:54:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:02,975 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2022-11-16 15:54:02,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 15 states have (on average 2.4) internal successors, (36), 17 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 15:54:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2022-11-16 15:54:02,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 15:54:02,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:02,976 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:02,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 15:54:03,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:03,183 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:54:03,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:03,183 INFO L85 PathProgramCache]: Analyzing trace with hash -830290910, now seen corresponding path program 1 times [2022-11-16 15:54:03,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:03,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724677238] [2022-11-16 15:54:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:03,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 15:54:03,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:03,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724677238] [2022-11-16 15:54:03,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724677238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:54:03,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:54:03,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 15:54:03,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849661409] [2022-11-16 15:54:03,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:54:03,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 15:54:03,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 15:54:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 15:54:03,290 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 6 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-11-16 15:54:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:03,467 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2022-11-16 15:54:03,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 15:54:03,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 29 [2022-11-16 15:54:03,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:03,468 INFO L225 Difference]: With dead ends: 111 [2022-11-16 15:54:03,469 INFO L226 Difference]: Without dead ends: 111 [2022-11-16 15:54:03,469 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 [2022-11-16 15:54:03,469 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 81 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:03,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 209 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 15:54:03,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-16 15:54:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2022-11-16 15:54:03,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 89 states have internal predecessors, (98), 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) [2022-11-16 15:54:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2022-11-16 15:54:03,475 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 29 [2022-11-16 15:54:03,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:03,476 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2022-11-16 15:54:03,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-11-16 15:54:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2022-11-16 15:54:03,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 15:54:03,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:03,477 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:03,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 15:54:03,477 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:54:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:03,477 INFO L85 PathProgramCache]: Analyzing trace with hash -830290909, now seen corresponding path program 1 times [2022-11-16 15:54:03,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:03,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094385386] [2022-11-16 15:54:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:03,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 15:54:03,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:03,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094385386] [2022-11-16 15:54:03,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094385386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:54:03,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:54:03,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 15:54:03,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707313301] [2022-11-16 15:54:03,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:54:03,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 15:54:03,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:03,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 15:54:03,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 15:54:03,666 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 6 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-11-16 15:54:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:03,835 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2022-11-16 15:54:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 15:54:03,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 29 [2022-11-16 15:54:03,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:03,836 INFO L225 Difference]: With dead ends: 92 [2022-11-16 15:54:03,836 INFO L226 Difference]: Without dead ends: 92 [2022-11-16 15:54:03,836 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 [2022-11-16 15:54:03,837 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 82 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:03,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 222 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:54:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-16 15:54:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-11-16 15:54:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 52 states have (on average 1.8461538461538463) internal successors, (96), 87 states have internal predecessors, (96), 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) [2022-11-16 15:54:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2022-11-16 15:54:03,840 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 29 [2022-11-16 15:54:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:03,841 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2022-11-16 15:54:03,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-11-16 15:54:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2022-11-16 15:54:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 15:54:03,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:03,842 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:03,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 15:54:03,843 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:54:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:03,843 INFO L85 PathProgramCache]: Analyzing trace with hash 30799322, now seen corresponding path program 1 times [2022-11-16 15:54:03,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:03,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844771944] [2022-11-16 15:54:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:03,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:54:04,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:04,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844771944] [2022-11-16 15:54:04,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844771944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:04,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662472461] [2022-11-16 15:54:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:04,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:04,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:54:04,412 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:54:04,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 15:54:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:04,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 15:54:04,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:54:04,699 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 [2022-11-16 15:54:04,816 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_709 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_709))) (exists ((v_ArrVal_711 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_711))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-16 15:54:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:04,829 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 [2022-11-16 15:54:04,847 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-16 15:54:04,847 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 21 treesize of output 29 [2022-11-16 15:54:04,890 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 [2022-11-16 15:54:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 15:54:04,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 15:54:04,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662472461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:54:04,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 15:54:04,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 21 [2022-11-16 15:54:04,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985866753] [2022-11-16 15:54:04,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:54:04,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 15:54:04,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:04,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 15:54:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=365, Unknown=2, NotChecked=38, Total=462 [2022-11-16 15:54:04,895 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 11 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 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) [2022-11-16 15:54:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:05,307 INFO L93 Difference]: Finished difference Result 149 states and 166 transitions. [2022-11-16 15:54:05,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 15:54:05,308 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 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 30 [2022-11-16 15:54:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:05,309 INFO L225 Difference]: With dead ends: 149 [2022-11-16 15:54:05,309 INFO L226 Difference]: Without dead ends: 149 [2022-11-16 15:54:05,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=436, Unknown=2, NotChecked=42, Total=552 [2022-11-16 15:54:05,310 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 86 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:05,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 636 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 501 Invalid, 0 Unknown, 343 Unchecked, 0.4s Time] [2022-11-16 15:54:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-16 15:54:05,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 91. [2022-11-16 15:54:05,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 53 states have (on average 1.8113207547169812) internal successors, (96), 86 states have internal predecessors, (96), 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) [2022-11-16 15:54:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2022-11-16 15:54:05,314 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 30 [2022-11-16 15:54:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:05,318 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2022-11-16 15:54:05,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 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) [2022-11-16 15:54:05,319 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2022-11-16 15:54:05,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 15:54:05,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:05,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:05,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 15:54:05,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:05,529 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:54:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:05,529 INFO L85 PathProgramCache]: Analyzing trace with hash 30799323, now seen corresponding path program 1 times [2022-11-16 15:54:05,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:05,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948583095] [2022-11-16 15:54:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:05,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:54:06,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:06,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948583095] [2022-11-16 15:54:06,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948583095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:06,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562008692] [2022-11-16 15:54:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:06,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:06,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:54:06,466 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:54:06,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 15:54:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:06,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 15:54:06,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:54:06,886 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 25 treesize of output 17 [2022-11-16 15:54:06,891 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 [2022-11-16 15:54:07,082 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_824 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_824) |c_#length|)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_828 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_828))) (exists ((v_ArrVal_827 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_827) |c_#memory_$Pointer$.base|)))) is different from true [2022-11-16 15:54:07,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:07,103 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 31 treesize of output 31 [2022-11-16 15:54:07,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:07,111 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 22 treesize of output 24 [2022-11-16 15:54:07,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:07,117 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 29 treesize of output 29 [2022-11-16 15:54:07,131 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 15:54:07,131 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 [2022-11-16 15:54:07,189 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 23 treesize of output 15 [2022-11-16 15:54:07,194 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 [2022-11-16 15:54:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2022-11-16 15:54:07,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:54:08,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562008692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:08,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659587977] [2022-11-16 15:54:08,256 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 15:54:08,256 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:54:08,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:54:08,257 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:54:08,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:54:08,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,274 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 [2022-11-16 15:54:08,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,305 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 [2022-11-16 15:54:08,315 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 [2022-11-16 15:54:08,319 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 [2022-11-16 15:54:08,330 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 [2022-11-16 15:54:08,334 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 [2022-11-16 15:54:08,339 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 [2022-11-16 15:54:08,347 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 [2022-11-16 15:54:08,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,354 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 27 treesize of output 11 [2022-11-16 15:54:08,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,361 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 27 treesize of output 11 [2022-11-16 15:54:08,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,384 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 [2022-11-16 15:54:08,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,411 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 [2022-11-16 15:54:08,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,439 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 [2022-11-16 15:54:08,587 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:54:08,588 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 208 treesize of output 197 [2022-11-16 15:54:08,732 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 [2022-11-16 15:54:08,741 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 [2022-11-16 15:54:08,750 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 [2022-11-16 15:54:08,759 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 [2022-11-16 15:54:08,770 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 [2022-11-16 15:54:08,783 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:08,785 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:08,787 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:08,789 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:08,792 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:08,860 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:54:08,861 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 208 treesize of output 197 [2022-11-16 15:54:08,988 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 [2022-11-16 15:54:08,997 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 [2022-11-16 15:54:09,006 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 [2022-11-16 15:54:09,017 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 [2022-11-16 15:54:09,026 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 [2022-11-16 15:54:09,054 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:09,057 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:09,059 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:09,061 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:09,063 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:09,124 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 19 treesize of output 11 [2022-11-16 15:54:09,135 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 19 treesize of output 11 [2022-11-16 15:54:09,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:09,156 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 [2022-11-16 15:54:09,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:09,377 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 133 treesize of output 117 [2022-11-16 15:54:09,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:09,389 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 0 case distinctions, treesize of input 129 treesize of output 117 [2022-11-16 15:54:09,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:09,402 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 0 case distinctions, treesize of input 125 treesize of output 113 [2022-11-16 15:54:09,659 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 [2022-11-16 15:54:09,674 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 [2022-11-16 15:54:09,685 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 [2022-11-16 15:54:09,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:09,811 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:54:09,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:54:09,823 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 7 treesize of output 5 [2022-11-16 15:54:09,832 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 [2022-11-16 15:54:09,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:09,848 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:54:09,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:54:09,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:10,000 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:54:10,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:54:10,012 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 [2022-11-16 15:54:10,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:10,034 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:54:10,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:54:10,052 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 7 treesize of output 5 [2022-11-16 15:54:10,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:10,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:10,342 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 [2022-11-16 15:54:10,353 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 21 for LOIs [2022-11-16 15:54:10,361 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 [2022-11-16 15:54:10,366 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 [2022-11-16 15:54:10,383 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 [2022-11-16 15:54:10,388 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 [2022-11-16 15:54:10,395 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 [2022-11-16 15:54:10,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:10,414 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 27 treesize of output 11 [2022-11-16 15:54:10,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:10,422 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 27 treesize of output 11 [2022-11-16 15:54:10,429 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 [2022-11-16 15:54:10,434 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:54:16,087 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3545#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 0) 0) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_append_~head#1.base| |ULTIMATE.start_sll_circular_append_#in~head#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 0) 0) (= |ULTIMATE.start_sll_circular_append_~data#1| (select (select |#memory_int| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 4)) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (= (select |#valid| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= (+ |ULTIMATE.start_sll_circular_append_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_append_~head#1.base|)) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (= |ULTIMATE.start_sll_circular_append_~last~1#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset|)) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (or (not (<= 0 |ULTIMATE.start_sll_circular_append_~last~1#1.offset|)) (not (<= (+ |ULTIMATE.start_sll_circular_append_~last~1#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_append_~last~1#1.base|)))) (= |ULTIMATE.start_main_~uneq~0#1| |ULTIMATE.start_sll_circular_append_#in~data#1|) (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_sll_circular_append_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_circular_create_~head~0#1.base| |ULTIMATE.start_sll_circular_create_#res#1.base|) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (= |ULTIMATE.start_sll_circular_append_~last~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset|)) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.base| 0)) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.offset|) (= (select |#valid| |ULTIMATE.start_sll_circular_append_~head#1.base|) 1) (= |ULTIMATE.start_sll_circular_append_#in~data#1| |ULTIMATE.start_sll_circular_append_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_append_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= 8 (select |#length| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_sll_circular_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (< |ULTIMATE.start_sll_circular_append_~new_last~0#1.base| |#StackHeapBarrier|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset|) 0))) (= |#NULL.base| 0))' at error location [2022-11-16 15:54:16,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:54:16,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:54:16,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2022-11-16 15:54:16,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119635098] [2022-11-16 15:54:16,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:54:16,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 15:54:16,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:16,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 15:54:16,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2002, Unknown=2, NotChecked=90, Total=2256 [2022-11-16 15:54:16,090 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 27 states, 20 states have (on average 2.05) internal successors, (41), 23 states have internal predecessors, (41), 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) [2022-11-16 15:54:17,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:17,830 INFO L93 Difference]: Finished difference Result 156 states and 173 transitions. [2022-11-16 15:54:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 15:54:17,831 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 2.05) internal successors, (41), 23 states have internal predecessors, (41), 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 30 [2022-11-16 15:54:17,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:17,832 INFO L225 Difference]: With dead ends: 156 [2022-11-16 15:54:17,832 INFO L226 Difference]: Without dead ends: 156 [2022-11-16 15:54:17,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=232, Invalid=2848, Unknown=4, NotChecked=108, Total=3192 [2022-11-16 15:54:17,834 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 115 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:17,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 1615 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1364 Invalid, 0 Unknown, 221 Unchecked, 1.1s Time] [2022-11-16 15:54:17,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-16 15:54:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 95. [2022-11-16 15:54:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.7543859649122806) internal successors, (100), 90 states have internal predecessors, (100), 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) [2022-11-16 15:54:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2022-11-16 15:54:17,839 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 30 [2022-11-16 15:54:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:17,840 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2022-11-16 15:54:17,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 2.05) internal successors, (41), 23 states have internal predecessors, (41), 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) [2022-11-16 15:54:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2022-11-16 15:54:17,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 15:54:17,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:17,841 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:17,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 15:54:18,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:18,048 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:54:18,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:18,048 INFO L85 PathProgramCache]: Analyzing trace with hash -479830871, now seen corresponding path program 1 times [2022-11-16 15:54:18,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:18,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435014545] [2022-11-16 15:54:18,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:18,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 15:54:18,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:18,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435014545] [2022-11-16 15:54:18,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435014545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:54:18,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:54:18,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 15:54:18,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448397620] [2022-11-16 15:54:18,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:54:18,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 15:54:18,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:18,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 15:54:18,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 15:54:18,170 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 15:54:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:18,264 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2022-11-16 15:54:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 15:54:18,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-11-16 15:54:18,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:18,266 INFO L225 Difference]: With dead ends: 108 [2022-11-16 15:54:18,266 INFO L226 Difference]: Without dead ends: 108 [2022-11-16 15:54:18,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 15:54:18,267 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 232 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:18,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 80 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:54:18,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-16 15:54:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2022-11-16 15:54:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 86 states have internal predecessors, (96), 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) [2022-11-16 15:54:18,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2022-11-16 15:54:18,272 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 32 [2022-11-16 15:54:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:18,273 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2022-11-16 15:54:18,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 15:54:18,273 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2022-11-16 15:54:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 15:54:18,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:18,275 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:18,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 15:54:18,276 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:54:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:18,276 INFO L85 PathProgramCache]: Analyzing trace with hash -479830870, now seen corresponding path program 1 times [2022-11-16 15:54:18,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:18,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919712015] [2022-11-16 15:54:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:18,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 15:54:18,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:18,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919712015] [2022-11-16 15:54:18,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919712015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:54:18,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:54:18,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 15:54:18,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650278989] [2022-11-16 15:54:18,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:54:18,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 15:54:18,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:18,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 15:54:18,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 15:54:18,537 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 15:54:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:18,657 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2022-11-16 15:54:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 15:54:18,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-11-16 15:54:18,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:18,659 INFO L225 Difference]: With dead ends: 87 [2022-11-16 15:54:18,659 INFO L226 Difference]: Without dead ends: 87 [2022-11-16 15:54:18,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-16 15:54:18,660 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 142 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:18,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 93 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:54:18,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-16 15:54:18,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-16 15:54:18,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 57 states have (on average 1.6140350877192982) internal successors, (92), 82 states have internal predecessors, (92), 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) [2022-11-16 15:54:18,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2022-11-16 15:54:18,664 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 32 [2022-11-16 15:54:18,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:18,666 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2022-11-16 15:54:18,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 15:54:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2022-11-16 15:54:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 15:54:18,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:18,671 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:18,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 15:54:18,671 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:54:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:18,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1555821865, now seen corresponding path program 1 times [2022-11-16 15:54:18,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:18,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79921608] [2022-11-16 15:54:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:18,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 15:54:18,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:18,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79921608] [2022-11-16 15:54:18,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79921608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:54:18,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:54:18,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 15:54:18,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313181176] [2022-11-16 15:54:18,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:54:18,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 15:54:18,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:18,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 15:54:18,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-16 15:54:18,960 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 9 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 8 states have internal predecessors, (22), 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) [2022-11-16 15:54:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:19,230 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2022-11-16 15:54:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 15:54:19,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 8 states have internal predecessors, (22), 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 34 [2022-11-16 15:54:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:19,231 INFO L225 Difference]: With dead ends: 152 [2022-11-16 15:54:19,231 INFO L226 Difference]: Without dead ends: 152 [2022-11-16 15:54:19,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-16 15:54:19,232 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 382 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:19,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 255 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 15:54:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-16 15:54:19,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2022-11-16 15:54:19,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 85 states have internal predecessors, (96), 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) [2022-11-16 15:54:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2022-11-16 15:54:19,235 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 34 [2022-11-16 15:54:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:19,236 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2022-11-16 15:54:19,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 8 states have internal predecessors, (22), 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) [2022-11-16 15:54:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2022-11-16 15:54:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 15:54:19,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:19,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:19,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 15:54:19,237 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:54:19,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:19,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1555821864, now seen corresponding path program 1 times [2022-11-16 15:54:19,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:19,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169608174] [2022-11-16 15:54:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:19,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 15:54:19,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:19,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169608174] [2022-11-16 15:54:19,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169608174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:54:19,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:54:19,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 15:54:19,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643615609] [2022-11-16 15:54:19,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:54:19,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 15:54:19,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:19,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 15:54:19,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-16 15:54:19,640 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 9 states, 6 states have (on average 4.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2022-11-16 15:54:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:19,935 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2022-11-16 15:54:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 15:54:19,935 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 4.0) internal successors, (24), 8 states have internal predecessors, (24), 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 34 [2022-11-16 15:54:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:19,936 INFO L225 Difference]: With dead ends: 176 [2022-11-16 15:54:19,936 INFO L226 Difference]: Without dead ends: 176 [2022-11-16 15:54:19,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 15:54:19,937 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 313 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:19,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 273 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 15:54:19,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-16 15:54:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 93. [2022-11-16 15:54:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 64 states have (on average 1.546875) internal successors, (99), 88 states have internal predecessors, (99), 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) [2022-11-16 15:54:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2022-11-16 15:54:19,941 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 34 [2022-11-16 15:54:19,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:19,941 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2022-11-16 15:54:19,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 4.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2022-11-16 15:54:19,941 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2022-11-16 15:54:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 15:54:19,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:19,942 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:19,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 15:54:19,942 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:54:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:19,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1746936392, now seen corresponding path program 1 times [2022-11-16 15:54:19,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:19,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715188712] [2022-11-16 15:54:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:19,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:54:21,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:21,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715188712] [2022-11-16 15:54:21,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715188712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:21,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748702570] [2022-11-16 15:54:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:21,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:21,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:54:21,210 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:54:21,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 15:54:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:21,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-16 15:54:21,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:54:21,480 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 [2022-11-16 15:54:21,699 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 15:54:21,699 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 [2022-11-16 15:54:21,834 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 [2022-11-16 15:54:21,941 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 15:54:21,941 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 44 treesize of output 37 [2022-11-16 15:54:22,013 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:54:22,015 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 39 treesize of output 22 [2022-11-16 15:54:22,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:54:22,027 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 [2022-11-16 15:54:22,164 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (exists ((v_ArrVal_1233 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1233))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_1232 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1232) |c_#memory_$Pointer$.offset|)))) is different from true [2022-11-16 15:54:22,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,183 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 [2022-11-16 15:54:22,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,200 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-16 15:54:22,200 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 45 treesize of output 43 [2022-11-16 15:54:22,232 INFO L321 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2022-11-16 15:54:22,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 52 [2022-11-16 15:54:22,328 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 [2022-11-16 15:54:22,435 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:54:22,435 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 50 treesize of output 25 [2022-11-16 15:54:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 15:54:22,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:54:22,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748702570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:22,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328806010] [2022-11-16 15:54:22,646 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-16 15:54:22,647 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:54:22,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:54:22,647 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:54:22,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:54:22,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,672 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 [2022-11-16 15:54:22,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,700 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 [2022-11-16 15:54:22,709 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 [2022-11-16 15:54:22,713 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 [2022-11-16 15:54:22,720 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 [2022-11-16 15:54:22,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:54:22,735 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 [2022-11-16 15:54:22,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,745 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 27 treesize of output 11 [2022-11-16 15:54:22,750 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 [2022-11-16 15:54:22,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,757 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 27 treesize of output 11 [2022-11-16 15:54:22,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,789 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 [2022-11-16 15:54:22,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,817 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 [2022-11-16 15:54:22,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,843 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 [2022-11-16 15:54:22,968 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:54:22,969 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 208 treesize of output 197 [2022-11-16 15:54:23,114 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 [2022-11-16 15:54:23,123 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 [2022-11-16 15:54:23,134 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 [2022-11-16 15:54:23,144 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 [2022-11-16 15:54:23,155 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 [2022-11-16 15:54:23,171 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:23,172 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:23,187 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:23,189 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:23,191 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:23,285 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:54:23,286 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 208 treesize of output 197 [2022-11-16 15:54:23,416 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 [2022-11-16 15:54:23,426 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 [2022-11-16 15:54:23,435 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 [2022-11-16 15:54:23,444 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 [2022-11-16 15:54:23,454 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 [2022-11-16 15:54:23,467 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:23,470 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:23,472 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:23,473 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:23,526 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 19 treesize of output 11 [2022-11-16 15:54:23,535 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 19 treesize of output 11 [2022-11-16 15:54:23,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:23,548 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 [2022-11-16 15:54:23,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:23,742 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 133 treesize of output 117 [2022-11-16 15:54:23,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:23,754 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 0 case distinctions, treesize of input 129 treesize of output 117 [2022-11-16 15:54:23,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:23,765 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 0 case distinctions, treesize of input 125 treesize of output 113 [2022-11-16 15:54:24,013 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 [2022-11-16 15:54:24,029 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 [2022-11-16 15:54:24,041 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 [2022-11-16 15:54:24,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:24,156 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:54:24,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:54:24,166 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 7 treesize of output 5 [2022-11-16 15:54:24,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:24,186 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:54:24,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:54:24,197 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 [2022-11-16 15:54:24,313 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 7 treesize of output 5 [2022-11-16 15:54:24,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:24,329 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:54:24,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:54:24,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:24,369 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:54:24,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:54:24,382 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 [2022-11-16 15:54:25,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:25,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:25,088 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 [2022-11-16 15:54:25,096 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 21 for LOIs [2022-11-16 15:54:25,105 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 9 [2022-11-16 15:54:25,112 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 [2022-11-16 15:54:25,134 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 [2022-11-16 15:54:25,140 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 [2022-11-16 15:54:25,145 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 [2022-11-16 15:54:25,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:25,161 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 27 treesize of output 11 [2022-11-16 15:54:25,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:25,169 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 27 treesize of output 11 [2022-11-16 15:54:25,175 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 [2022-11-16 15:54:25,180 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:54:29,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4929#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 5 |ULTIMATE.start_sll_circular_append_#in~data#1|) (<= |ULTIMATE.start_sll_circular_append_~data#1| 5) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.base|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_circular_append_#in~data#1| 5) (not (= (select |#valid| |ULTIMATE.start_sll_circular_append_~last~1#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.base|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_append_#in~head#1.offset| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (<= 5 |ULTIMATE.start_sll_circular_append_~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_sll_circular_append_~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-16 15:54:29,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:54:29,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:54:29,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2022-11-16 15:54:29,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256994465] [2022-11-16 15:54:29,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:54:29,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 15:54:29,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:30,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 15:54:30,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2870, Unknown=2, NotChecked=108, Total=3192 [2022-11-16 15:54:30,001 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 36 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 30 states have internal predecessors, (53), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 15:54:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:31,087 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2022-11-16 15:54:31,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 15:54:31,088 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 30 states have internal predecessors, (53), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 34 [2022-11-16 15:54:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:31,089 INFO L225 Difference]: With dead ends: 112 [2022-11-16 15:54:31,089 INFO L226 Difference]: Without dead ends: 112 [2022-11-16 15:54:31,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=264, Invalid=3398, Unknown=2, NotChecked=118, Total=3782 [2022-11-16 15:54:31,090 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 20 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:31,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 880 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 847 Invalid, 0 Unknown, 235 Unchecked, 0.7s Time] [2022-11-16 15:54:31,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-16 15:54:31,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2022-11-16 15:54:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.5064935064935066) internal successors, (116), 101 states have internal predecessors, (116), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 15:54:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2022-11-16 15:54:31,095 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 34 [2022-11-16 15:54:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:31,095 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2022-11-16 15:54:31,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 30 states have internal predecessors, (53), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 15:54:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2022-11-16 15:54:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 15:54:31,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:31,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:31,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 15:54:31,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 15:54:31,302 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:54:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:31,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1746936391, now seen corresponding path program 1 times [2022-11-16 15:54:31,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:31,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041533121] [2022-11-16 15:54:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:31,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:54:33,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:33,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041533121] [2022-11-16 15:54:33,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041533121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:33,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792336107] [2022-11-16 15:54:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:33,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:33,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:54:33,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:54:33,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 15:54:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:33,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-16 15:54:33,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:54:33,780 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 [2022-11-16 15:54:34,095 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:54:34,095 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 [2022-11-16 15:54:34,233 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 [2022-11-16 15:54:34,248 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 11 treesize of output 7 [2022-11-16 15:54:34,365 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 15:54:34,365 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 71 treesize of output 52 [2022-11-16 15:54:34,373 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 [2022-11-16 15:54:34,470 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:54:34,470 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 63 treesize of output 34 [2022-11-16 15:54:34,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:54:34,484 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 [2022-11-16 15:54:34,490 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:54:34,685 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_1367 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1367))) (exists ((v_ArrVal_1368 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1368))) (exists ((v_ArrVal_1364 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1364))))) is different from true [2022-11-16 15:54:34,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:34,719 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-16 15:54:34,720 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 69 treesize of output 59 [2022-11-16 15:54:34,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:34,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 15:54:34,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:34,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:34,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:34,738 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 25 treesize of output 30 [2022-11-16 15:54:34,758 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-16 15:54:34,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 15:54:35,069 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-11-16 15:54:35,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 41 [2022-11-16 15:54:35,082 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 15:54:35,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-11-16 15:54:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 15:54:35,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:54:35,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792336107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:35,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278867624] [2022-11-16 15:54:35,682 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-16 15:54:35,682 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:54:35,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:54:35,683 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:54:35,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:54:35,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:35,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:35,704 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 [2022-11-16 15:54:35,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:35,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:35,733 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 [2022-11-16 15:54:35,745 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 [2022-11-16 15:54:35,748 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 [2022-11-16 15:54:35,755 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 [2022-11-16 15:54:35,759 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 [2022-11-16 15:54:35,763 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 [2022-11-16 15:54:35,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:35,773 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 27 treesize of output 11 [2022-11-16 15:54:35,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:35,780 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 27 treesize of output 11 [2022-11-16 15:54:35,786 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 [2022-11-16 15:54:35,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:35,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:35,808 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 [2022-11-16 15:54:35,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:35,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:35,837 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 [2022-11-16 15:54:35,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:35,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:35,862 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 [2022-11-16 15:54:35,981 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:54:35,981 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 208 treesize of output 197 [2022-11-16 15:54:36,094 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 [2022-11-16 15:54:36,104 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 [2022-11-16 15:54:36,113 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 [2022-11-16 15:54:36,126 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 [2022-11-16 15:54:36,137 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 [2022-11-16 15:54:36,150 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:36,151 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:36,153 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:36,154 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:36,157 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:36,219 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:54:36,220 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 208 treesize of output 197 [2022-11-16 15:54:36,323 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 [2022-11-16 15:54:36,334 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 13 treesize of output 9 [2022-11-16 15:54:36,344 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 [2022-11-16 15:54:36,356 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 [2022-11-16 15:54:36,368 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 [2022-11-16 15:54:36,380 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:36,382 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:36,383 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:36,385 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:36,388 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:54:36,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:36,506 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 250 treesize of output 234 [2022-11-16 15:54:36,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:36,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 236 [2022-11-16 15:54:36,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:36,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 252 [2022-11-16 15:54:36,646 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 19 treesize of output 11 [2022-11-16 15:54:36,655 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 19 treesize of output 11 [2022-11-16 15:54:36,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:36,667 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 [2022-11-16 15:54:36,747 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 [2022-11-16 15:54:36,760 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 [2022-11-16 15:54:36,784 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 [2022-11-16 15:54:36,845 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 [2022-11-16 15:54:36,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:36,860 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:54:36,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:54:36,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:36,879 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:54:36,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:54:36,890 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 7 treesize of output 5 [2022-11-16 15:54:36,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:36,944 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:54:36,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:54:36,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:36,963 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:54:36,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:54:36,974 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 [2022-11-16 15:54:36,983 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 7 treesize of output 5 [2022-11-16 15:54:37,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:37,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:37,529 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 [2022-11-16 15:54:37,540 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 13 for LOIs [2022-11-16 15:54:37,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-16 15:54:37,550 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 [2022-11-16 15:54:37,561 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 [2022-11-16 15:54:37,566 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 [2022-11-16 15:54:37,571 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 [2022-11-16 15:54:37,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:37,595 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 27 treesize of output 11 [2022-11-16 15:54:37,602 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 [2022-11-16 15:54:37,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:37,608 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 27 treesize of output 11 [2022-11-16 15:54:37,610 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:54:42,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5356#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 5 |ULTIMATE.start_sll_circular_append_#in~data#1|) (<= |ULTIMATE.start_sll_circular_append_~data#1| 5) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.base|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_circular_append_#in~data#1| 5) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.base|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (or (not (<= 0 |ULTIMATE.start_sll_circular_append_~last~1#1.offset|)) (not (<= (+ |ULTIMATE.start_sll_circular_append_~last~1#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_append_~last~1#1.base|)))) (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_append_#in~head#1.offset| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (<= 5 |ULTIMATE.start_sll_circular_append_~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_sll_circular_append_~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-16 15:54:42,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:54:42,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:54:42,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2022-11-16 15:54:42,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917058322] [2022-11-16 15:54:42,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:54:42,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-16 15:54:42,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:42,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-16 15:54:42,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4052, Unknown=2, NotChecked=128, Total=4422 [2022-11-16 15:54:42,398 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand has 42 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 34 states have internal predecessors, (56), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 15:54:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:45,641 INFO L93 Difference]: Finished difference Result 226 states and 256 transitions. [2022-11-16 15:54:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 15:54:45,642 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 34 states have internal predecessors, (56), 6 states have call successors, (6), 4 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 34 [2022-11-16 15:54:45,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:45,643 INFO L225 Difference]: With dead ends: 226 [2022-11-16 15:54:45,643 INFO L226 Difference]: Without dead ends: 226 [2022-11-16 15:54:45,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=360, Invalid=5804, Unknown=2, NotChecked=154, Total=6320 [2022-11-16 15:54:45,645 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 179 mSDsluCounter, 2479 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 2940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:45,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 2612 Invalid, 2940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2493 Invalid, 0 Unknown, 426 Unchecked, 2.0s Time] [2022-11-16 15:54:45,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-16 15:54:45,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 107. [2022-11-16 15:54:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 76 states have (on average 1.5) internal successors, (114), 100 states have internal predecessors, (114), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 15:54:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2022-11-16 15:54:45,651 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 34 [2022-11-16 15:54:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:45,651 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2022-11-16 15:54:45,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 34 states have internal predecessors, (56), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 15:54:45,652 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2022-11-16 15:54:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 15:54:45,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:45,653 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:45,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 15:54:45,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:45,859 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:54:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:45,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1797945913, now seen corresponding path program 1 times [2022-11-16 15:54:45,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:45,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013818158] [2022-11-16 15:54:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:45,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 15:54:45,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:45,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013818158] [2022-11-16 15:54:45,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013818158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:54:45,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:54:45,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 15:54:45,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399322165] [2022-11-16 15:54:45,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:54:45,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 15:54:45,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:45,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 15:54:45,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 15:54:45,958 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 5 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 15:54:46,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:46,106 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2022-11-16 15:54:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 15:54:46,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-11-16 15:54:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:46,107 INFO L225 Difference]: With dead ends: 146 [2022-11-16 15:54:46,108 INFO L226 Difference]: Without dead ends: 146 [2022-11-16 15:54:46,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 15:54:46,108 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 137 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:46,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 165 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:54:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-16 15:54:46,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 107. [2022-11-16 15:54:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 77 states have (on average 1.4935064935064934) internal successors, (115), 100 states have internal predecessors, (115), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 15:54:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2022-11-16 15:54:46,113 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 37 [2022-11-16 15:54:46,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:46,113 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2022-11-16 15:54:46,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 15:54:46,113 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2022-11-16 15:54:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 15:54:46,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:46,116 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:46,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 15:54:46,118 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:54:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:46,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1797945914, now seen corresponding path program 1 times [2022-11-16 15:54:46,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:46,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398934526] [2022-11-16 15:54:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:46,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 15:54:46,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:46,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398934526] [2022-11-16 15:54:46,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398934526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:54:46,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:54:46,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 15:54:46,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432936715] [2022-11-16 15:54:46,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:54:46,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 15:54:46,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:46,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 15:54:46,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-16 15:54:46,656 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand has 11 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 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) [2022-11-16 15:54:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:47,015 INFO L93 Difference]: Finished difference Result 160 states and 184 transitions. [2022-11-16 15:54:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 15:54:47,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 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 37 [2022-11-16 15:54:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:47,016 INFO L225 Difference]: With dead ends: 160 [2022-11-16 15:54:47,016 INFO L226 Difference]: Without dead ends: 160 [2022-11-16 15:54:47,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-16 15:54:47,017 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 222 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:47,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 326 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 15:54:47,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-16 15:54:47,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 114. [2022-11-16 15:54:47,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 107 states have internal predecessors, (127), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 15:54:47,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-11-16 15:54:47,022 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 37 [2022-11-16 15:54:47,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:47,023 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-11-16 15:54:47,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 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) [2022-11-16 15:54:47,023 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-11-16 15:54:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 15:54:47,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:47,024 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:47,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 15:54:47,024 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:54:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash -98245993, now seen corresponding path program 1 times [2022-11-16 15:54:47,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:47,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962137886] [2022-11-16 15:54:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:47,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:54:47,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:47,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962137886] [2022-11-16 15:54:47,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962137886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:47,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455013617] [2022-11-16 15:54:47,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:47,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:47,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:54:47,982 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:54:48,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 15:54:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:48,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-16 15:54:48,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:54:48,381 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 [2022-11-16 15:54:48,440 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 15:54:48,441 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 19 treesize of output 18 [2022-11-16 15:54:48,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:54:48,506 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 [2022-11-16 15:54:48,576 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:54:48,577 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 36 treesize of output 15 [2022-11-16 15:54:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 15:54:48,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:54:48,667 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 80 treesize of output 76 [2022-11-16 15:54:55,057 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 31 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 15:54:55,135 INFO L321 Elim1Store]: treesize reduction 11, result has 82.0 percent of original size [2022-11-16 15:54:55,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 683 treesize of output 660 [2022-11-16 15:54:55,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:54:55,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 592 treesize of output 610 [2022-11-16 15:54:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 15:54:59,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455013617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:54:59,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [21301865] [2022-11-16 15:54:59,900 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-16 15:54:59,900 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:54:59,900 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:54:59,901 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:54:59,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:54:59,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:59,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:59,918 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 [2022-11-16 15:54:59,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:59,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:59,944 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 [2022-11-16 15:54:59,953 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 [2022-11-16 15:54:59,957 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 [2022-11-16 15:54:59,966 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 [2022-11-16 15:54:59,969 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 [2022-11-16 15:54:59,974 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 [2022-11-16 15:54:59,981 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 [2022-11-16 15:54:59,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:59,986 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 27 treesize of output 11 [2022-11-16 15:54:59,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:59,993 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 27 treesize of output 11 [2022-11-16 15:55:00,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:00,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:00,018 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 [2022-11-16 15:55:00,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:00,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:00,042 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 [2022-11-16 15:55:00,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:00,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:00,067 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 [2022-11-16 15:55:00,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:00,117 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:00,117 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 [2022-11-16 15:55:00,144 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 [2022-11-16 15:55:00,152 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 [2022-11-16 15:55:00,160 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 [2022-11-16 15:55:00,170 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 [2022-11-16 15:55:00,185 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 [2022-11-16 15:55:00,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:00,210 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:00,210 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 [2022-11-16 15:55:00,235 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 [2022-11-16 15:55:00,244 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 [2022-11-16 15:55:00,253 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 [2022-11-16 15:55:00,263 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 [2022-11-16 15:55:00,298 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 [2022-11-16 15:55:00,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:00,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:00,414 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 250 treesize of output 234 [2022-11-16 15:55:00,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:00,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 236 [2022-11-16 15:55:00,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:00,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 244 [2022-11-16 15:55:00,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:00,611 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 [2022-11-16 15:55:00,619 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 19 treesize of output 11 [2022-11-16 15:55:00,637 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 19 treesize of output 11 [2022-11-16 15:55:00,827 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 [2022-11-16 15:55:00,842 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 [2022-11-16 15:55:00,852 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 [2022-11-16 15:55:00,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:00,938 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:00,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:55:00,953 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 [2022-11-16 15:55:00,966 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 7 treesize of output 5 [2022-11-16 15:55:00,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:00,982 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:00,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:55:01,056 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 7 treesize of output 5 [2022-11-16 15:55:01,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:01,076 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:01,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:55:01,087 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 [2022-11-16 15:55:01,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:01,106 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:01,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:55:01,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:01,247 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 [2022-11-16 15:55:01,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:01,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:01,278 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 15:55:01,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 181 treesize of output 172 [2022-11-16 15:55:01,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:01,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:01,312 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-16 15:55:01,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 173 treesize of output 168 [2022-11-16 15:55:01,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:01,401 INFO L321 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2022-11-16 15:55:01,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2022-11-16 15:55:01,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:01,420 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 [2022-11-16 15:55:01,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:01,469 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 15:55:01,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2022-11-16 15:55:01,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:01,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:01,783 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 [2022-11-16 15:55:01,793 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 13 for LOIs [2022-11-16 15:55:01,799 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 [2022-11-16 15:55:01,803 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 [2022-11-16 15:55:01,821 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 [2022-11-16 15:55:01,825 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 [2022-11-16 15:55:01,829 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 [2022-11-16 15:55:01,839 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 [2022-11-16 15:55:01,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:01,846 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 27 treesize of output 11 [2022-11-16 15:55:01,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:01,862 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 27 treesize of output 11 [2022-11-16 15:55:01,864 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:55:09,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [21301865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:55:09,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:55:09,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [21, 11, 6] total 56 [2022-11-16 15:55:09,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367577602] [2022-11-16 15:55:09,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:55:09,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 15:55:09,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:55:09,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 15:55:09,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2782, Unknown=1, NotChecked=0, Total=3080 [2022-11-16 15:55:09,418 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 24 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 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) [2022-11-16 15:55:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:55:11,374 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2022-11-16 15:55:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 15:55:11,375 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 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) Word has length 38 [2022-11-16 15:55:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:55:11,376 INFO L225 Difference]: With dead ends: 137 [2022-11-16 15:55:11,376 INFO L226 Difference]: Without dead ends: 137 [2022-11-16 15:55:11,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=297, Invalid=2782, Unknown=1, NotChecked=0, Total=3080 [2022-11-16 15:55:11,377 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 184 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 15:55:11,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 267 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 15:55:11,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-16 15:55:11,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 99. [2022-11-16 15:55:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 71 states have (on average 1.4929577464788732) internal successors, (106), 94 states have internal predecessors, (106), 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) [2022-11-16 15:55:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2022-11-16 15:55:11,382 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 38 [2022-11-16 15:55:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:55:11,382 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2022-11-16 15:55:11,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 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) [2022-11-16 15:55:11,383 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2022-11-16 15:55:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 15:55:11,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:55:11,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:55:11,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 15:55:11,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:11,590 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:55:11,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:55:11,591 INFO L85 PathProgramCache]: Analyzing trace with hash -992565610, now seen corresponding path program 2 times [2022-11-16 15:55:11,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:55:11,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145653679] [2022-11-16 15:55:11,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:11,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:55:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:55:13,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:55:13,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145653679] [2022-11-16 15:55:13,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145653679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:13,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646500752] [2022-11-16 15:55:13,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 15:55:13,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:13,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:55:13,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:55:13,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 15:55:13,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 15:55:13,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:55:13,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-16 15:55:13,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:55:13,498 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 [2022-11-16 15:55:13,808 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:13,808 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 [2022-11-16 15:55:13,967 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 [2022-11-16 15:55:13,979 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 [2022-11-16 15:55:14,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:14,084 INFO L321 Elim1Store]: treesize reduction 37, result has 28.8 percent of original size [2022-11-16 15:55:14,084 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 95 treesize of output 49 [2022-11-16 15:55:14,089 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 34 treesize of output 36 [2022-11-16 15:55:14,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:14,187 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:55:14,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 39 [2022-11-16 15:55:14,195 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2022-11-16 15:55:14,288 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_1781 (Array Int Int)) (v_ArrVal_1780 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1780)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1781)))) is different from true [2022-11-16 15:55:14,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:14,321 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-16 15:55:14,322 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 85 [2022-11-16 15:55:14,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:14,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:14,332 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-16 15:55:14,333 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 96 treesize of output 91 [2022-11-16 15:55:14,358 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-11-16 15:55:14,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2022-11-16 15:55:14,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:14,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:14,800 INFO L321 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2022-11-16 15:55:14,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 103 treesize of output 68 [2022-11-16 15:55:15,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:15,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:15,039 INFO L321 Elim1Store]: treesize reduction 102, result has 12.1 percent of original size [2022-11-16 15:55:15,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 41 [2022-11-16 15:55:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 15:55:15,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:55:15,190 INFO L321 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2022-11-16 15:55:15,190 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 24 treesize of output 23 [2022-11-16 15:55:15,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646500752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:15,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2030044046] [2022-11-16 15:55:15,522 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-16 15:55:15,523 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:55:15,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:55:15,523 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:55:15,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:55:15,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,541 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 [2022-11-16 15:55:15,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,565 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 [2022-11-16 15:55:15,574 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 [2022-11-16 15:55:15,577 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 [2022-11-16 15:55:15,587 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 [2022-11-16 15:55:15,593 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 [2022-11-16 15:55:15,597 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 [2022-11-16 15:55:15,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,606 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 27 treesize of output 11 [2022-11-16 15:55:15,612 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 13 treesize of output 9 [2022-11-16 15:55:15,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,618 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 27 treesize of output 11 [2022-11-16 15:55:15,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,643 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 [2022-11-16 15:55:15,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,665 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 [2022-11-16 15:55:15,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 15:55:15,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,741 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:15,741 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 [2022-11-16 15:55:15,766 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 [2022-11-16 15:55:15,775 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 [2022-11-16 15:55:15,788 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 [2022-11-16 15:55:15,797 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 [2022-11-16 15:55:15,806 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 [2022-11-16 15:55:15,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,844 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:15,844 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 [2022-11-16 15:55:15,870 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 [2022-11-16 15:55:15,879 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 [2022-11-16 15:55:15,888 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 [2022-11-16 15:55:15,897 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 [2022-11-16 15:55:15,908 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 [2022-11-16 15:55:15,956 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 19 treesize of output 11 [2022-11-16 15:55:15,968 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 19 treesize of output 11 [2022-11-16 15:55:15,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:15,981 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 [2022-11-16 15:55:16,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:16,040 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:16,040 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 [2022-11-16 15:55:16,072 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 [2022-11-16 15:55:16,084 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 [2022-11-16 15:55:16,095 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 [2022-11-16 15:55:16,105 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 [2022-11-16 15:55:16,115 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 [2022-11-16 15:55:16,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:16,139 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:16,140 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 [2022-11-16 15:55:16,169 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 [2022-11-16 15:55:16,179 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 [2022-11-16 15:55:16,189 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 [2022-11-16 15:55:16,198 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 [2022-11-16 15:55:16,211 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 [2022-11-16 15:55:16,256 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 19 treesize of output 11 [2022-11-16 15:55:16,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:16,269 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 [2022-11-16 15:55:16,281 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 19 treesize of output 11 [2022-11-16 15:55:16,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:16,332 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:16,332 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 [2022-11-16 15:55:16,361 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 [2022-11-16 15:55:16,371 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 [2022-11-16 15:55:16,382 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 [2022-11-16 15:55:16,396 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 [2022-11-16 15:55:16,406 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 [2022-11-16 15:55:16,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:16,455 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:16,456 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 [2022-11-16 15:55:16,484 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 [2022-11-16 15:55:16,497 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 [2022-11-16 15:55:16,505 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 [2022-11-16 15:55:16,512 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 [2022-11-16 15:55:16,521 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 [2022-11-16 15:55:16,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:16,575 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:16,575 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 [2022-11-16 15:55:16,619 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 23 treesize of output 11 [2022-11-16 15:55:16,647 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 15:55:16,647 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 15:55:16,676 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 15:55:16,677 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 15:55:16,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:16,722 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:16,722 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 [2022-11-16 15:55:16,776 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 [2022-11-16 15:55:16,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:55:16,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 15:55:16,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:16,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:16,821 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:16,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-16 15:55:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:16,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:16,844 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:16,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-16 15:55:16,871 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:16,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:55:16,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:16,915 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:16,916 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 [2022-11-16 15:55:16,972 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:55:16,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 15:55:16,992 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 [2022-11-16 15:55:17,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:17,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:17,016 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:17,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-16 15:55:17,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:17,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:17,039 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:17,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-16 15:55:17,060 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:17,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:55:17,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:17,726 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:17,726 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 [2022-11-16 15:55:17,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:17,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:17,757 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 [2022-11-16 15:55:17,768 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 13 for LOIs [2022-11-16 15:55:17,774 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 [2022-11-16 15:55:17,778 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 [2022-11-16 15:55:17,787 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 [2022-11-16 15:55:17,791 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 11 treesize of output 7 [2022-11-16 15:55:17,796 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 [2022-11-16 15:55:17,807 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 [2022-11-16 15:55:17,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:17,814 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 27 treesize of output 11 [2022-11-16 15:55:17,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:17,822 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 27 treesize of output 11 [2022-11-16 15:55:17,824 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:55:25,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7011#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 5 |ULTIMATE.start_sll_circular_append_#in~data#1|) (<= |ULTIMATE.start_sll_circular_append_~data#1| 5) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 1 |ULTIMATE.start_sll_circular_create_~len#1|) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.base|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_circular_append_#in~data#1| 5) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_circular_append_~last~1#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.base|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_append_#in~head#1.offset| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (<= 5 |ULTIMATE.start_sll_circular_append_~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_sll_circular_append_~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-16 15:55:25,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:55:25,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:55:25,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 43 [2022-11-16 15:55:25,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237604987] [2022-11-16 15:55:25,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:55:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 15:55:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:55:25,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 15:55:25,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=4301, Unknown=1, NotChecked=132, Total=4692 [2022-11-16 15:55:25,464 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand has 43 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 37 states have internal predecessors, (61), 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) [2022-11-16 15:55:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:55:27,066 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2022-11-16 15:55:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 15:55:27,067 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 37 states have internal predecessors, (61), 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 [2022-11-16 15:55:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:55:27,068 INFO L225 Difference]: With dead ends: 126 [2022-11-16 15:55:27,068 INFO L226 Difference]: Without dead ends: 126 [2022-11-16 15:55:27,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=355, Invalid=5654, Unknown=1, NotChecked=152, Total=6162 [2022-11-16 15:55:27,070 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 135 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 15:55:27,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1239 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1149 Invalid, 0 Unknown, 297 Unchecked, 0.8s Time] [2022-11-16 15:55:27,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-16 15:55:27,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 89. [2022-11-16 15:55:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 84 states have internal predecessors, (94), 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) [2022-11-16 15:55:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2022-11-16 15:55:27,074 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 38 [2022-11-16 15:55:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:55:27,074 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2022-11-16 15:55:27,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 37 states have internal predecessors, (61), 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) [2022-11-16 15:55:27,075 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2022-11-16 15:55:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 15:55:27,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:55:27,076 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:55:27,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-16 15:55:27,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:27,282 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:55:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:55:27,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1249172353, now seen corresponding path program 1 times [2022-11-16 15:55:27,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:55:27,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579389620] [2022-11-16 15:55:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:27,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:55:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:55:27,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:55:27,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579389620] [2022-11-16 15:55:27,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579389620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:27,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574003009] [2022-11-16 15:55:27,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:27,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:27,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:55:27,687 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:55:27,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 15:55:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:27,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 15:55:27,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:55:28,070 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 [2022-11-16 15:55:28,109 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_1927 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1927) |c_#memory_$Pointer$.base|))) is different from true [2022-11-16 15:55:28,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:28,116 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 [2022-11-16 15:55:28,142 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 [2022-11-16 15:55:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-16 15:55:28,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:55:28,209 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1931 (Array Int Int)) (|v_node_create_~temp~0#1.base_59| Int)) (or (not (< |v_node_create_~temp~0#1.base_59| |c_#StackHeapBarrier|)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_59| v_ArrVal_1931) |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|) 0)))) is different from false [2022-11-16 15:55:28,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574003009] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:28,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [598491336] [2022-11-16 15:55:28,212 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-16 15:55:28,212 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:55:28,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:55:28,213 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:55:28,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:55:28,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:28,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:28,235 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 [2022-11-16 15:55:28,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:28,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:28,259 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 [2022-11-16 15:55:28,268 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 [2022-11-16 15:55:28,272 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 [2022-11-16 15:55:28,278 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 [2022-11-16 15:55:28,283 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 [2022-11-16 15:55:28,287 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 [2022-11-16 15:55:28,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:28,295 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 27 treesize of output 11 [2022-11-16 15:55:28,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:28,301 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 27 treesize of output 11 [2022-11-16 15:55:28,306 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 [2022-11-16 15:55:28,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:28,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:28,332 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 [2022-11-16 15:55:28,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:28,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:28,355 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 [2022-11-16 15:55:28,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:28,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:28,383 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 [2022-11-16 15:55:28,485 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:55:28,486 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 208 treesize of output 197 [2022-11-16 15:55:28,619 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 [2022-11-16 15:55:28,628 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 [2022-11-16 15:55:28,637 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 [2022-11-16 15:55:28,646 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 [2022-11-16 15:55:28,658 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 [2022-11-16 15:55:28,671 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:55:28,672 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:55:28,674 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:55:28,676 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:55:28,677 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:55:28,749 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:55:28,750 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 208 treesize of output 197 [2022-11-16 15:55:28,903 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 9 treesize of output 3 [2022-11-16 15:55:28,913 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 [2022-11-16 15:55:28,922 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 [2022-11-16 15:55:28,934 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 [2022-11-16 15:55:28,943 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 [2022-11-16 15:55:28,956 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:55:28,959 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:55:28,960 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:55:28,961 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:55:28,964 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:55:29,005 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 19 treesize of output 11 [2022-11-16 15:55:29,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:29,018 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 [2022-11-16 15:55:29,027 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 19 treesize of output 11 [2022-11-16 15:55:29,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:29,228 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 133 treesize of output 117 [2022-11-16 15:55:29,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:29,239 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 0 case distinctions, treesize of input 129 treesize of output 117 [2022-11-16 15:55:29,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:29,250 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 0 case distinctions, treesize of input 125 treesize of output 113 [2022-11-16 15:55:29,509 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 [2022-11-16 15:55:29,519 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 [2022-11-16 15:55:29,531 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 [2022-11-16 15:55:29,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:29,650 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:29,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:55:29,661 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 7 treesize of output 5 [2022-11-16 15:55:29,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:29,678 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:29,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:55:29,694 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 [2022-11-16 15:55:29,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:29,804 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:29,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:55:29,820 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 7 treesize of output 5 [2022-11-16 15:55:29,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:29,837 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:29,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:55:29,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 15:55:29,934 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 [2022-11-16 15:55:29,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:29,970 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 15:55:29,970 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 19 treesize of output 22 [2022-11-16 15:55:29,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:29,997 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 15:55:29,997 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 19 treesize of output 18 [2022-11-16 15:55:30,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:30,052 INFO L321 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2022-11-16 15:55:30,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2022-11-16 15:55:30,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:30,082 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 15:55:30,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2022-11-16 15:55:30,109 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 [2022-11-16 15:55:30,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:30,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:30,352 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 [2022-11-16 15:55:30,361 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 21 for LOIs [2022-11-16 15:55:30,369 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 [2022-11-16 15:55:30,373 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 [2022-11-16 15:55:30,387 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 [2022-11-16 15:55:30,392 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 [2022-11-16 15:55:30,397 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 [2022-11-16 15:55:30,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:30,411 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 27 treesize of output 11 [2022-11-16 15:55:30,417 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 13 treesize of output 9 [2022-11-16 15:55:30,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:30,424 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 27 treesize of output 11 [2022-11-16 15:55:30,428 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:55:38,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7451#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 5 |ULTIMATE.start_sll_circular_append_#in~data#1|) (<= 0 |ULTIMATE.start_main_~last~2#1.offset|) (<= |ULTIMATE.start_sll_circular_append_~data#1| 5) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) |ULTIMATE.start_main_~data~0#1|)) (<= (+ |ULTIMATE.start_main_~ptr~0#1.offset| 8) (select |#length| |ULTIMATE.start_main_~ptr~0#1.base|)) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (= (select |#valid| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_circular_append_#in~data#1| 5) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= (+ |ULTIMATE.start_sll_circular_append_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_append_~head#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~last~2#1.base|) |ULTIMATE.start_main_~last~2#1.offset|)) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_main_~count~0#1| 0) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.base|) (<= (+ |ULTIMATE.start_main_~#s~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~last~2#1.base|) |ULTIMATE.start_main_~last~2#1.offset|)) (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset|)) (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= (+ |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) (<= |ULTIMATE.start_sll_circular_append_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (<= 5 |ULTIMATE.start_sll_circular_append_~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.offset|) (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset|)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) (= (select |#valid| |ULTIMATE.start_sll_circular_append_~head#1.base|) 1) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_main_~last~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_sll_circular_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= (select |#valid| |ULTIMATE.start_main_~last~2#1.base|) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~last~2#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 15:55:38,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:55:38,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:55:38,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2022-11-16 15:55:38,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734605289] [2022-11-16 15:55:38,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:55:38,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 15:55:38,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:55:38,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 15:55:38,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2059, Unknown=2, NotChecked=186, Total=2450 [2022-11-16 15:55:38,752 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 23 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 20 states have internal predecessors, (44), 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) [2022-11-16 15:55:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:55:39,279 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2022-11-16 15:55:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 15:55:39,279 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 20 states have internal predecessors, (44), 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 39 [2022-11-16 15:55:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:55:39,280 INFO L225 Difference]: With dead ends: 78 [2022-11-16 15:55:39,280 INFO L226 Difference]: Without dead ends: 78 [2022-11-16 15:55:39,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=262, Invalid=2606, Unknown=2, NotChecked=210, Total=3080 [2022-11-16 15:55:39,282 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 226 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 15:55:39,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 593 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 431 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2022-11-16 15:55:39,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-16 15:55:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-16 15:55:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.5) internal successors, (81), 73 states have internal predecessors, (81), 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) [2022-11-16 15:55:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2022-11-16 15:55:39,285 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 39 [2022-11-16 15:55:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:55:39,285 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2022-11-16 15:55:39,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 20 states have internal predecessors, (44), 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) [2022-11-16 15:55:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2022-11-16 15:55:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 15:55:39,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:55:39,286 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:55:39,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 15:55:39,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 15:55:39,492 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:55:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:55:39,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1689273, now seen corresponding path program 1 times [2022-11-16 15:55:39,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:55:39,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286081426] [2022-11-16 15:55:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:39,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:55:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:55:40,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:55:40,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286081426] [2022-11-16 15:55:40,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286081426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:40,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523351159] [2022-11-16 15:55:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:40,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:40,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:55:40,437 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:55:40,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 15:55:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:40,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 15:55:40,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:55:40,924 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 [2022-11-16 15:55:40,927 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 [2022-11-16 15:55:41,161 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-16 15:55:41,161 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 21 treesize of output 29 [2022-11-16 15:55:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:41,170 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 [2022-11-16 15:55:41,524 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 15:55:41,524 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 54 treesize of output 51 [2022-11-16 15:55:41,622 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 15:55:41,622 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 50 treesize of output 46 [2022-11-16 15:55:41,686 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 [2022-11-16 15:55:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:55:41,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 15:55:41,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523351159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:55:41,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 15:55:41,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [20] total 35 [2022-11-16 15:55:41,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844345191] [2022-11-16 15:55:41,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:55:41,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 15:55:41,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:55:41,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 15:55:41,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1155, Unknown=1, NotChecked=0, Total=1260 [2022-11-16 15:55:41,691 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 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) [2022-11-16 15:55:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:55:42,154 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2022-11-16 15:55:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 15:55:42,154 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 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 39 [2022-11-16 15:55:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:55:42,155 INFO L225 Difference]: With dead ends: 147 [2022-11-16 15:55:42,155 INFO L226 Difference]: Without dead ends: 147 [2022-11-16 15:55:42,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=1417, Unknown=1, NotChecked=0, Total=1560 [2022-11-16 15:55:42,157 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 267 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 15:55:42,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 374 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 423 Invalid, 0 Unknown, 169 Unchecked, 0.3s Time] [2022-11-16 15:55:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-16 15:55:42,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 85. [2022-11-16 15:55:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.459016393442623) internal successors, (89), 80 states have internal predecessors, (89), 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) [2022-11-16 15:55:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2022-11-16 15:55:42,161 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 39 [2022-11-16 15:55:42,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:55:42,161 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2022-11-16 15:55:42,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 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) [2022-11-16 15:55:42,161 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2022-11-16 15:55:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 15:55:42,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:55:42,162 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:55:42,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 15:55:42,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 15:55:42,375 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:55:42,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:55:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1689274, now seen corresponding path program 1 times [2022-11-16 15:55:42,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:55:42,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963431430] [2022-11-16 15:55:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:42,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:55:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:55:43,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:55:43,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963431430] [2022-11-16 15:55:43,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963431430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:43,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825895357] [2022-11-16 15:55:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:43,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:43,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:55:43,455 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:55:43,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 15:55:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 15:55:43,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:55:43,951 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 [2022-11-16 15:55:44,014 WARN L855 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_2209 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_2209) |c_#memory_$Pointer$.base|))) is different from true [2022-11-16 15:55:44,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:44,082 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 [2022-11-16 15:55:44,378 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 15:55:44,378 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 45 treesize of output 44 [2022-11-16 15:55:44,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:44,384 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 33 [2022-11-16 15:55:44,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:44,466 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 31 treesize of output 31 [2022-11-16 15:55:44,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:44,472 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 29 treesize of output 29 [2022-11-16 15:55:44,553 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 32 treesize of output 20 [2022-11-16 15:55:44,556 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 [2022-11-16 15:55:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-16 15:55:44,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:55:44,666 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2213 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2213) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (forall ((v_ArrVal_2214 (Array Int Int)) (v_ArrVal_2213 (Array Int Int))) (<= (+ 4 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2213) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2214) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2022-11-16 15:55:44,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:55:44,844 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 50 treesize of output 54 [2022-11-16 15:55:45,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:55:45,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 240 [2022-11-16 15:55:45,143 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 224 treesize of output 222 [2022-11-16 15:55:45,149 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 222 treesize of output 218 [2022-11-16 15:55:45,155 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 218 treesize of output 214 [2022-11-16 15:55:45,160 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 214 treesize of output 206 [2022-11-16 15:55:45,419 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.offset|) (< |c_#StackHeapBarrier| (+ 1 |c_ULTIMATE.start_main_~#s~0#1.base|)) (= |c_ULTIMATE.start_sll_circular_append_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) (forall ((|v_node_create_~temp~0#1.base_62| Int)) (or (forall ((v_ArrVal_2218 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_62| v_ArrVal_2218) |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|) |c_ULTIMATE.start_main_~#s~0#1.base|))) (not (< |v_node_create_~temp~0#1.base_62| |c_#StackHeapBarrier|))))) is different from false [2022-11-16 15:55:45,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825895357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:45,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976482688] [2022-11-16 15:55:45,426 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-16 15:55:45,426 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:55:45,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:55:45,427 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:55:45,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:55:45,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,447 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 [2022-11-16 15:55:45,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,472 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 [2022-11-16 15:55:45,481 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 [2022-11-16 15:55:45,484 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 [2022-11-16 15:55:45,490 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 [2022-11-16 15:55:45,494 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 [2022-11-16 15:55:45,498 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 [2022-11-16 15:55:45,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,508 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 27 treesize of output 11 [2022-11-16 15:55:45,513 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 [2022-11-16 15:55:45,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,519 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 27 treesize of output 11 [2022-11-16 15:55:45,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,541 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 [2022-11-16 15:55:45,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,564 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 [2022-11-16 15:55:45,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,588 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 [2022-11-16 15:55:45,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,642 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:45,643 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 [2022-11-16 15:55:45,673 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 [2022-11-16 15:55:45,681 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 [2022-11-16 15:55:45,692 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 [2022-11-16 15:55:45,700 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 [2022-11-16 15:55:45,709 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 [2022-11-16 15:55:45,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,731 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:55:45,732 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 [2022-11-16 15:55:45,762 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 [2022-11-16 15:55:45,771 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 [2022-11-16 15:55:45,783 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 [2022-11-16 15:55:45,791 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 [2022-11-16 15:55:45,798 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 [2022-11-16 15:55:45,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:45,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:45,898 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 250 treesize of output 234 [2022-11-16 15:55:45,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:45,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 236 [2022-11-16 15:55:45,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:45,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 244 [2022-11-16 15:55:46,075 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 [2022-11-16 15:55:46,082 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 [2022-11-16 15:55:46,089 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 [2022-11-16 15:55:46,234 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 [2022-11-16 15:55:46,250 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 [2022-11-16 15:55:46,258 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 [2022-11-16 15:55:46,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:46,336 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:46,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:55:46,349 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 7 treesize of output 5 [2022-11-16 15:55:46,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:46,367 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:46,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:55:46,377 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 [2022-11-16 15:55:46,455 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 [2022-11-16 15:55:46,467 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 7 treesize of output 5 [2022-11-16 15:55:46,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:46,483 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:46,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:55:46,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:46,499 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:46,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:55:46,585 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 [2022-11-16 15:55:46,618 INFO L321 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-16 15:55:46,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 34 [2022-11-16 15:55:46,651 INFO L321 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2022-11-16 15:55:46,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 42 [2022-11-16 15:55:46,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:46,715 INFO L321 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-16 15:55:46,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 37 [2022-11-16 15:55:46,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:46,759 INFO L321 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-16 15:55:46,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 36 [2022-11-16 15:55:46,776 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 [2022-11-16 15:55:46,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:46,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:46,885 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 [2022-11-16 15:55:46,895 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 13 for LOIs [2022-11-16 15:55:46,901 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 [2022-11-16 15:55:46,904 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 [2022-11-16 15:55:46,914 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 [2022-11-16 15:55:46,919 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 [2022-11-16 15:55:46,924 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 [2022-11-16 15:55:46,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:46,936 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 27 treesize of output 11 [2022-11-16 15:55:46,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:46,949 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 27 treesize of output 11 [2022-11-16 15:55:46,954 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 [2022-11-16 15:55:46,955 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:55:53,216 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8240#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 5 |ULTIMATE.start_sll_circular_append_#in~data#1|) (<= |ULTIMATE.start_sll_circular_append_~data#1| 5) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset|)) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (= (select |#valid| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_circular_append_#in~data#1| 5) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset|)) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= (+ |ULTIMATE.start_sll_circular_append_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_append_~head#1.base|)) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_main_~count~0#1| 0) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.base|) (<= (+ |ULTIMATE.start_main_~#s~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (<= (+ |ULTIMATE.start_sll_circular_append_~last~1#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_append_~last~1#1.base|)) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 0) (or (not (<= (+ |ULTIMATE.start_main_~last~2#1.offset| 4) (select |#length| |ULTIMATE.start_main_~last~2#1.base|))) (not (<= 0 |ULTIMATE.start_main_~last~2#1.offset|))) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_circular_append_~last~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|)) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (or (= |ULTIMATE.start_sll_circular_append_~last~1#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|)) (and (= |ULTIMATE.start_sll_circular_append_~last~1#1.offset| |ULTIMATE.start_sll_circular_append_~head#1.offset|) (= |ULTIMATE.start_sll_circular_append_~last~1#1.base| |ULTIMATE.start_sll_circular_append_~head#1.base|))) (<= (+ |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) (<= |ULTIMATE.start_sll_circular_append_#in~head#1.offset| 0) (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_append_~last~1#1.base|) |ULTIMATE.start_sll_circular_append_~last~1#1.offset|)) (<= 0 |ULTIMATE.start_sll_circular_append_~last~1#1.offset|) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (<= 5 |ULTIMATE.start_sll_circular_append_~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_append_~last~1#1.base|) |ULTIMATE.start_sll_circular_append_~last~1#1.offset|)) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.offset|) (= (select |#valid| |ULTIMATE.start_sll_circular_append_~head#1.base|) 1) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_main_~last~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (<= 0 |#StackHeapBarrier|) (or (not (= |ULTIMATE.start_sll_circular_append_~last~1#1.base| 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|) 0))) (<= |ULTIMATE.start_sll_circular_append_~head#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_circular_append_~last~1#1.base|) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~last~2#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 15:55:53,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:55:53,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:55:53,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2022-11-16 15:55:53,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676121449] [2022-11-16 15:55:53,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:55:53,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 15:55:53,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:55:53,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 15:55:53,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=4527, Unknown=28, NotChecked=414, Total=5256 [2022-11-16 15:55:53,219 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 39 states, 32 states have (on average 1.9375) internal successors, (62), 33 states have internal predecessors, (62), 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) [2022-11-16 15:55:55,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:55:55,094 INFO L93 Difference]: Finished difference Result 169 states and 191 transitions. [2022-11-16 15:55:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 15:55:55,094 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 32 states have (on average 1.9375) internal successors, (62), 33 states have internal predecessors, (62), 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 39 [2022-11-16 15:55:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:55:55,095 INFO L225 Difference]: With dead ends: 169 [2022-11-16 15:55:55,095 INFO L226 Difference]: Without dead ends: 169 [2022-11-16 15:55:55,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=455, Invalid=6667, Unknown=30, NotChecked=504, Total=7656 [2022-11-16 15:55:55,098 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 917 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 15:55:55,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 857 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 958 Invalid, 0 Unknown, 200 Unchecked, 0.8s Time] [2022-11-16 15:55:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-16 15:55:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 84. [2022-11-16 15:55:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 79 states have internal predecessors, (87), 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) [2022-11-16 15:55:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2022-11-16 15:55:55,102 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 39 [2022-11-16 15:55:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:55:55,103 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2022-11-16 15:55:55,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 32 states have (on average 1.9375) internal successors, (62), 33 states have internal predecessors, (62), 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) [2022-11-16 15:55:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2022-11-16 15:55:55,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 15:55:55,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:55:55,104 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:55:55,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 15:55:55,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:55,310 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:55:55,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:55:55,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1214407912, now seen corresponding path program 1 times [2022-11-16 15:55:55,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:55:55,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392023949] [2022-11-16 15:55:55,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:55,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:55:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:55:56,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:55:56,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392023949] [2022-11-16 15:55:56,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392023949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:56,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023167327] [2022-11-16 15:55:56,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:56,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:56,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:55:56,437 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:55:56,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 15:55:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:56,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 15:55:56,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:55:56,967 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 [2022-11-16 15:55:56,970 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 [2022-11-16 15:55:57,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:57,140 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 [2022-11-16 15:55:57,155 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 15:55:57,155 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 [2022-11-16 15:55:57,407 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-16 15:55:57,408 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 51 treesize of output 37 [2022-11-16 15:55:57,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:57,414 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 26 treesize of output 28 [2022-11-16 15:55:57,503 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-16 15:55:57,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 72 [2022-11-16 15:55:57,516 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 15:55:57,516 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 56 treesize of output 57 [2022-11-16 15:55:57,595 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 [2022-11-16 15:55:57,740 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-16 15:55:57,741 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 57 treesize of output 24 [2022-11-16 15:55:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:55:57,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 15:55:57,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023167327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:55:57,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 15:55:57,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [23] total 42 [2022-11-16 15:55:57,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409565930] [2022-11-16 15:55:57,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:55:57,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 15:55:57,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:55:57,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 15:55:57,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1601, Unknown=1, NotChecked=0, Total=1722 [2022-11-16 15:55:57,780 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 21 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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) [2022-11-16 15:55:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:55:58,421 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2022-11-16 15:55:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 15:55:58,421 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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 42 [2022-11-16 15:55:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:55:58,422 INFO L225 Difference]: With dead ends: 86 [2022-11-16 15:55:58,422 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 15:55:58,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=171, Invalid=2082, Unknown=3, NotChecked=0, Total=2256 [2022-11-16 15:55:58,423 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 31 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 15:55:58,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 712 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 519 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-16 15:55:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 15:55:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-16 15:55:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.4126984126984128) internal successors, (89), 81 states have internal predecessors, (89), 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) [2022-11-16 15:55:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2022-11-16 15:55:58,427 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 42 [2022-11-16 15:55:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:55:58,428 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2022-11-16 15:55:58,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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) [2022-11-16 15:55:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2022-11-16 15:55:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 15:55:58,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:55:58,429 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:55:58,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 15:55:58,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 15:55:58,646 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:55:58,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:55:58,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1008065913, now seen corresponding path program 1 times [2022-11-16 15:55:58,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:55:58,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668921217] [2022-11-16 15:55:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:58,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:55:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:55:59,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:55:59,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668921217] [2022-11-16 15:55:59,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668921217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:59,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505747943] [2022-11-16 15:55:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:59,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:59,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:55:59,875 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:55:59,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 15:56:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:56:00,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-16 15:56:00,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:56:00,190 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 [2022-11-16 15:56:00,472 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 [2022-11-16 15:56:00,475 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 [2022-11-16 15:56:00,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:00,668 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 [2022-11-16 15:56:00,687 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-16 15:56:00,687 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 21 treesize of output 29 [2022-11-16 15:56:01,014 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-16 15:56:01,014 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 60 treesize of output 42 [2022-11-16 15:56:01,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:01,021 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 26 treesize of output 28 [2022-11-16 15:56:01,144 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-16 15:56:01,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 90 [2022-11-16 15:56:01,160 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 15:56:01,160 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 73 treesize of output 72 [2022-11-16 15:56:01,259 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 62 treesize of output 46 [2022-11-16 15:56:01,381 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-16 15:56:01,382 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 72 treesize of output 31 [2022-11-16 15:56:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:56:01,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:56:01,566 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2506 (Array Int Int)) (v_ArrVal_2505 (Array Int Int))) (= (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2505) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) 1)) is different from false [2022-11-16 15:56:01,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:56:01,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 259 [2022-11-16 15:56:01,824 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 248 treesize of output 244 [2022-11-16 15:56:01,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 120 [2022-11-16 15:56:04,199 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (let ((.cse16 (= .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse0 (= |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|))) (let ((.cse9 (not .cse0)) (.cse6 (not .cse16)) (.cse3 (select |c_#memory_$Pointer$.base| .cse2))) (let ((.cse12 (let ((.cse27 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int)) (let ((.cse35 (let ((.cse36 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse36 (select (select .cse36 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse35 v_arrayElimCell_904)) 1) (= (select |c_#valid| (select .cse35 v_arrayElimCell_906)) 1))))) (.cse28 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int)) (= (select |c_#valid| (select (let ((.cse34 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse34 (select (select .cse34 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_906)) 1)))) (and (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int) (v_arrayElimCell_907 Int)) (let ((.cse22 (let ((.cse23 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse23 (select (select .cse23 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse22 v_arrayElimCell_904)) 1) (= (select |c_#valid| (select .cse22 v_arrayElimCell_906)) 1) (= (select |c_#valid| (select .cse22 v_arrayElimCell_907)) 1)))) (or .cse9 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int) (v_arrayElimCell_907 Int)) (let ((.cse24 (let ((.cse25 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse25 (select (select .cse25 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse24 v_arrayElimCell_906)) 1) (= (select |c_#valid| (select .cse24 v_arrayElimCell_907)) 1))))) (or (and (or (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_905 Int)) (= (select |c_#valid| (select (let ((.cse26 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse26 (select (select .cse26 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_904)) 1)) .cse0) .cse27 (or .cse28 .cse9)) .cse16) (or (and .cse27 .cse28) .cse9) (or .cse0 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_905 Int) (v_arrayElimCell_907 Int)) (let ((.cse29 (let ((.cse30 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse30 (select (select .cse30 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse29 v_arrayElimCell_904)) 1) (= (select |c_#valid| (select .cse29 v_arrayElimCell_907)) 1))))) (or (and (or (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_905 Int) (v_arrayElimCell_907 Int)) (= (select |c_#valid| (select (let ((.cse31 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse31 (select (select .cse31 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_907)) 1)) .cse0) (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_905 Int) (v_arrayElimCell_907 Int)) (let ((.cse32 (let ((.cse33 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse33 (select (select .cse33 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (forall ((v_arrayElimCell_906 Int)) (= (select |c_#valid| (select .cse32 v_arrayElimCell_906)) 1)) (= (select |c_#valid| (select .cse32 v_arrayElimCell_907)) 1))))) .cse6)))) (.cse7 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int)) (= (select |c_#valid| (select (let ((.cse21 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse21 (select (select .cse21 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_906)) 1))) (.cse8 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int)) (let ((.cse19 (let ((.cse20 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse20 (select (select .cse20 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse19 v_arrayElimCell_906)) 1) (= (select |c_#valid| (select .cse19 v_arrayElimCell_904)) 1)))))) (and (or (and (or .cse0 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_907 Int)) (= (select |c_#valid| (select (let ((.cse1 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_907)) 1))) (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_907 Int)) (let ((.cse4 (let ((.cse5 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse5 (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (forall ((v_arrayElimCell_906 Int)) (= (select |c_#valid| (select .cse4 v_arrayElimCell_906)) 1)) (= (select |c_#valid| (select .cse4 v_arrayElimCell_907)) 1))))) .cse6) (or (and .cse7 .cse8) .cse9) (or .cse0 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_907 Int)) (let ((.cse10 (let ((.cse11 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse11 (select (select .cse11 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse10 v_arrayElimCell_907)) 1) (= (select |c_#valid| (select .cse10 v_arrayElimCell_904)) 1))))) (or (= |c_ULTIMATE.start_main_~#s~0#1.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.offset|) .cse12) (or .cse12 (= |c_ULTIMATE.start_sll_circular_append_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_arrayElimCell_907 Int)) (let ((.cse13 (let ((.cse14 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse14 (select (select .cse14 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse13 v_arrayElimCell_906)) 1) (= (select |c_#valid| (select .cse13 v_arrayElimCell_907)) 1) (= (select |c_#valid| (select .cse13 v_arrayElimCell_904)) 1)))) (or (and (or (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int)) (= (select |c_#valid| (select (let ((.cse15 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse15 (select (select .cse15 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_904)) 1)) .cse0) (or .cse7 .cse9) .cse8) .cse16) (or .cse9 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_arrayElimCell_907 Int)) (let ((.cse17 (let ((.cse18 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2506))) (select .cse18 (select (select .cse18 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse17 v_arrayElimCell_906)) 1) (= (select |c_#valid| (select .cse17 v_arrayElimCell_907)) 1)))))))))) is different from false [2022-11-16 15:56:06,636 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (let ((.cse7 (= |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse8 (= .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|))) (let ((.cse12 (not .cse8)) (.cse0 (not .cse7)) (.cse6 (select |c_#memory_$Pointer$.base| .cse5))) (let ((.cse2 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int)) (let ((.cse35 (let ((.cse36 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse36 (select (select .cse36 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse35 v_arrayElimCell_906)) 1) (= (select |c_#valid| (select .cse35 v_arrayElimCell_904)) 1))))) (.cse1 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int)) (= (select |c_#valid| (select (let ((.cse34 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse34 (select (select .cse34 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_906)) 1))) (.cse3 (let ((.cse23 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int)) (let ((.cse32 (let ((.cse33 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse33 (select (select .cse33 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse32 v_arrayElimCell_906)) 1) (= (select |c_#valid| (select .cse32 v_arrayElimCell_904)) 1))))) (.cse25 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int)) (= (select |c_#valid| (select (let ((.cse31 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse31 (select (select .cse31 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_906)) 1)))) (and (or .cse0 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int) (v_arrayElimCell_907 Int)) (let ((.cse19 (let ((.cse20 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse20 (select (select .cse20 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse19 v_arrayElimCell_907)) 1) (= (select |c_#valid| (select .cse19 v_arrayElimCell_906)) 1))))) (or (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_905 Int) (v_arrayElimCell_907 Int)) (let ((.cse21 (let ((.cse22 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse22 (select (select .cse22 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse21 v_arrayElimCell_907)) 1) (= (select |c_#valid| (select .cse21 v_arrayElimCell_904)) 1)))) .cse7) (or (and .cse23 (or .cse7 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_905 Int)) (= (select |c_#valid| (select (let ((.cse24 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse24 (select (select .cse24 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_904)) 1))) (or .cse0 .cse25)) .cse8) (or (and (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_905 Int) (v_arrayElimCell_907 Int)) (let ((.cse26 (let ((.cse27 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse27 (select (select .cse27 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (forall ((v_arrayElimCell_906 Int)) (= (select |c_#valid| (select .cse26 v_arrayElimCell_906)) 1)) (= (select |c_#valid| (select .cse26 v_arrayElimCell_907)) 1)))) (or .cse7 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_905 Int) (v_arrayElimCell_907 Int)) (= (select |c_#valid| (select (let ((.cse28 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse28 (select (select .cse28 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_907)) 1)))) .cse12) (or .cse0 (and .cse23 .cse25)) (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int) (v_arrayElimCell_907 Int)) (let ((.cse29 (let ((.cse30 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_905 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse30 (select (select .cse30 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse29 v_arrayElimCell_907)) 1) (= (select |c_#valid| (select .cse29 v_arrayElimCell_906)) 1) (= (select |c_#valid| (select .cse29 v_arrayElimCell_904)) 1)))))))) (and (or .cse0 (and .cse1 .cse2)) (or (= |c_ULTIMATE.start_main_~#s~0#1.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.offset|) .cse3) (or (and .cse2 (or (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int)) (= (select |c_#valid| (select (let ((.cse4 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse4 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_904)) 1)) .cse7) (or .cse0 .cse1)) .cse8) (or .cse3 (= |c_ULTIMATE.start_sll_circular_append_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (or (and (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_907 Int)) (let ((.cse9 (let ((.cse10 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse10 (select (select .cse10 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse9 v_arrayElimCell_907)) 1) (forall ((v_arrayElimCell_906 Int)) (= (select |c_#valid| (select .cse9 v_arrayElimCell_906)) 1))))) (or (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_907 Int)) (= (select |c_#valid| (select (let ((.cse11 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse11 (select (select .cse11 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_907)) 1)) .cse7)) .cse12) (or .cse7 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_907 Int)) (let ((.cse13 (let ((.cse14 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse14 (select (select .cse14 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse13 v_arrayElimCell_904)) 1) (= (select |c_#valid| (select .cse13 v_arrayElimCell_907)) 1))))) (or .cse0 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_arrayElimCell_907 Int)) (let ((.cse15 (let ((.cse16 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse16 (select (select .cse16 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse15 v_arrayElimCell_906)) 1) (= (select |c_#valid| (select .cse15 v_arrayElimCell_907)) 1))))) (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_arrayElimCell_907 Int)) (let ((.cse17 (let ((.cse18 (store (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 v_arrayElimCell_904 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2506))) (select .cse18 (select (select .cse18 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select |c_#valid| (select .cse17 v_arrayElimCell_906)) 1) (= (select |c_#valid| (select .cse17 v_arrayElimCell_904)) 1) (= (select |c_#valid| (select .cse17 v_arrayElimCell_907)) 1))))))))) is different from false [2022-11-16 15:56:07,770 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (not (< |c_ULTIMATE.start_main_~#s~0#1.base| |c_#StackHeapBarrier|))) (.cse6 (not (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 0))) (.cse8 (store |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base| 1))) (let ((.cse15 (and (forall ((|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| Int)) (or (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_905 Int) (v_ArrVal_2511 (Array Int Int)) (v_arrayElimCell_907 Int)) (let ((.cse40 (store |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| 1)) (.cse41 (let ((.cse42 (store (let ((.cse43 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2511))) (let ((.cse44 (select (select .cse43 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (store .cse43 .cse44 (store (select .cse43 .cse44) v_arrayElimCell_905 |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|)))) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2506))) (select .cse42 (select (select .cse42 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select .cse40 (select .cse41 v_arrayElimCell_907)) 1) (= (select .cse40 (select .cse41 v_arrayElimCell_904)) 1)))) (= |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|) 0)) (not (< |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_#StackHeapBarrier|)))) (forall ((|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|) 0)) (not (< |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_2511 (Array Int Int))) (let ((.cse48 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2511))) (let ((.cse49 (select (select .cse48 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_905 Int) (v_arrayElimCell_907 Int)) (let ((.cse45 (store |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| 1)) (.cse46 (let ((.cse47 (store (store .cse48 .cse49 (store (select .cse48 .cse49) v_arrayElimCell_905 |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|)) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2506))) (select .cse47 (select (select .cse47 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (forall ((v_arrayElimCell_906 Int)) (= (select .cse45 (select .cse46 v_arrayElimCell_906)) 1)) (= (select .cse45 (select .cse46 v_arrayElimCell_907)) 1)))) (not (= .cse49 |c_ULTIMATE.start_main_~#s~0#1.base|)))))))) (forall ((|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| Int)) (or (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int) (v_ArrVal_2511 (Array Int Int)) (v_arrayElimCell_907 Int)) (let ((.cse50 (store |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| 1)) (.cse51 (let ((.cse52 (store (let ((.cse53 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2511))) (let ((.cse54 (select (select .cse53 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (store .cse53 .cse54 (store (select .cse53 .cse54) v_arrayElimCell_905 |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|)))) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2506))) (select .cse52 (select (select .cse52 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select .cse50 (select .cse51 v_arrayElimCell_906)) 1) (= (select .cse50 (select .cse51 v_arrayElimCell_907)) 1) (= (select .cse50 (select .cse51 v_arrayElimCell_904)) 1)))) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|) 0)) (not (< |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_#StackHeapBarrier|)))) (forall ((|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| Int)) (or (forall ((v_ArrVal_2511 (Array Int Int))) (let ((.cse59 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2511))) (let ((.cse55 (select (select .cse59 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (= .cse55 |c_ULTIMATE.start_main_~#s~0#1.base|) (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int)) (let ((.cse56 (store |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| 1)) (.cse57 (let ((.cse58 (store (store .cse59 .cse55 (store (select .cse59 .cse55) v_arrayElimCell_905 |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|)) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2506))) (select .cse58 (select (select .cse58 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select .cse56 (select .cse57 v_arrayElimCell_906)) 1) (= (select .cse56 (select .cse57 v_arrayElimCell_904)) 1)))))))) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|) 0)) (not (< |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_#StackHeapBarrier|)))) (forall ((|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| Int)) (or (= |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|) 0)) (not (< |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_905 Int) (v_ArrVal_2511 (Array Int Int))) (let ((.cse62 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2511))) (let ((.cse60 (select (select .cse62 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (= .cse60 |c_ULTIMATE.start_main_~#s~0#1.base|) (= (select (store |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| 1) (select (let ((.cse61 (store (store .cse62 .cse60 (store (select .cse62 .cse60) v_arrayElimCell_905 |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|)) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2506))) (select .cse61 (select (select .cse61 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_904)) 1))))))) (forall ((|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| Int)) (or (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_905 Int) (v_ArrVal_2511 (Array Int Int)) (v_arrayElimCell_907 Int)) (let ((.cse65 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2511))) (let ((.cse63 (select (select .cse65 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (not (= .cse63 |c_ULTIMATE.start_main_~#s~0#1.base|)) (= (select (store |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| 1) (select (let ((.cse64 (store (store .cse65 .cse63 (store (select .cse65 .cse63) v_arrayElimCell_905 |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|)) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2506))) (select .cse64 (select (select .cse64 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_907)) 1))))) (= |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|) 0)) (not (< |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_#StackHeapBarrier|)))) (or .cse5 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int) (v_ArrVal_2511 (Array Int Int))) (let ((.cse67 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2511))) (let ((.cse66 (select (select .cse67 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (= .cse66 |c_ULTIMATE.start_main_~#s~0#1.base|) (= (select .cse8 (select (select (store (store .cse67 .cse66 (store (select .cse67 .cse66) v_arrayElimCell_905 |c_ULTIMATE.start_main_~#s~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2506) (select v_ArrVal_2506 |c_ULTIMATE.start_main_~#s~0#1.offset|)) v_arrayElimCell_906)) 1))))) .cse6) (or .cse5 .cse6 (and (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int) (v_ArrVal_2511 (Array Int Int))) (let ((.cse68 (select (store (let ((.cse69 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2511))) (let ((.cse70 (select (select .cse69 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (store .cse69 .cse70 (store (select .cse69 .cse70) v_arrayElimCell_905 |c_ULTIMATE.start_main_~#s~0#1.base|)))) |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2506) (select v_ArrVal_2506 |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (or (= (select .cse8 (select .cse68 v_arrayElimCell_906)) 1) (= (select .cse8 (select .cse68 v_arrayElimCell_904)) 1)))) (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int) (v_ArrVal_2511 (Array Int Int))) (= (select .cse8 (select (select (store (let ((.cse71 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2511))) (let ((.cse72 (select (select .cse71 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (store .cse71 .cse72 (store (select .cse71 .cse72) v_arrayElimCell_905 |c_ULTIMATE.start_main_~#s~0#1.base|)))) |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2506) (select v_ArrVal_2506 |c_ULTIMATE.start_main_~#s~0#1.offset|)) v_arrayElimCell_906)) 1)))) (or .cse5 .cse6 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_906 Int) (v_arrayElimCell_905 Int) (v_ArrVal_2511 (Array Int Int)) (v_arrayElimCell_907 Int)) (let ((.cse73 (select (store (let ((.cse74 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2511))) (let ((.cse75 (select (select .cse74 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (store .cse74 .cse75 (store (select .cse74 .cse75) v_arrayElimCell_905 |c_ULTIMATE.start_main_~#s~0#1.base|)))) |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2506) (select v_ArrVal_2506 |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (or (= (select .cse8 (select .cse73 v_arrayElimCell_907)) 1) (= (select .cse8 (select .cse73 v_arrayElimCell_906)) 1)))))))) (and (forall ((|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|) 0)) (not (< |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_ArrVal_2511 (Array Int Int)) (v_arrayElimCell_907 Int)) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| 1)) (.cse1 (let ((.cse2 (store (let ((.cse3 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2511))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (store .cse3 .cse4 (store (select .cse3 .cse4) v_arrayElimCell_904 |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|)))) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2506))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select .cse0 (select .cse1 v_arrayElimCell_904)) 1) (= (select .cse0 (select .cse1 v_arrayElimCell_907)) 1) (= (select .cse0 (select .cse1 v_arrayElimCell_906)) 1)))))) (or .cse5 .cse6 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_ArrVal_2511 (Array Int Int))) (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2511))) (let ((.cse7 (select (select .cse9 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (= .cse7 |c_ULTIMATE.start_main_~#s~0#1.base|) (= (select .cse8 (select (select (store (store .cse9 .cse7 (store (select .cse9 .cse7) v_arrayElimCell_904 |c_ULTIMATE.start_main_~#s~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2506) (select v_ArrVal_2506 |c_ULTIMATE.start_main_~#s~0#1.offset|)) v_arrayElimCell_906)) 1)))))) (forall ((|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| Int)) (or (forall ((v_ArrVal_2511 (Array Int Int))) (let ((.cse13 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2511))) (let ((.cse14 (select (select .cse13 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_907 Int)) (let ((.cse10 (store |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| 1)) (.cse11 (let ((.cse12 (store (store .cse13 .cse14 (store (select .cse13 .cse14) v_arrayElimCell_904 |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|)) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2506))) (select .cse12 (select (select .cse12 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select .cse10 (select .cse11 v_arrayElimCell_907)) 1) (forall ((v_arrayElimCell_906 Int)) (= (select .cse10 (select .cse11 v_arrayElimCell_906)) 1))))) (not (= .cse14 |c_ULTIMATE.start_main_~#s~0#1.base|)))))) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|) 0)) (not (< |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_#StackHeapBarrier|)))) (or (= |c_ULTIMATE.start_sll_circular_append_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) .cse15) (or .cse5 .cse6 (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_ArrVal_2511 (Array Int Int)) (v_arrayElimCell_907 Int)) (let ((.cse16 (select (store (let ((.cse17 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2511))) (let ((.cse18 (select (select .cse17 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (store .cse17 .cse18 (store (select .cse17 .cse18) v_arrayElimCell_904 |c_ULTIMATE.start_main_~#s~0#1.base|)))) |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2506) (select v_ArrVal_2506 |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (or (= (select .cse8 (select .cse16 v_arrayElimCell_907)) 1) (= (select .cse8 (select .cse16 v_arrayElimCell_906)) 1))))) (forall ((|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| Int)) (or (forall ((v_ArrVal_2511 (Array Int Int))) (let ((.cse23 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2511))) (let ((.cse19 (select (select .cse23 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (= .cse19 |c_ULTIMATE.start_main_~#s~0#1.base|) (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int)) (let ((.cse20 (store |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| 1)) (.cse21 (let ((.cse22 (store (store .cse23 .cse19 (store (select .cse23 .cse19) v_arrayElimCell_904 |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|)) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2506))) (select .cse22 (select (select .cse22 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select .cse20 (select .cse21 v_arrayElimCell_904)) 1) (= (select .cse20 (select .cse21 v_arrayElimCell_906)) 1)))))))) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|) 0)) (not (< |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_#StackHeapBarrier|)))) (or .cse5 .cse6 (and (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_ArrVal_2511 (Array Int Int))) (= (select .cse8 (select (select (store (let ((.cse24 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2511))) (let ((.cse25 (select (select .cse24 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (store .cse24 .cse25 (store (select .cse24 .cse25) v_arrayElimCell_904 |c_ULTIMATE.start_main_~#s~0#1.base|)))) |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2506) (select v_ArrVal_2506 |c_ULTIMATE.start_main_~#s~0#1.offset|)) v_arrayElimCell_906)) 1)) (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_arrayElimCell_906 Int) (v_ArrVal_2511 (Array Int Int))) (let ((.cse26 (select (store (let ((.cse27 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2511))) (let ((.cse28 (select (select .cse27 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (store .cse27 .cse28 (store (select .cse27 .cse28) v_arrayElimCell_904 |c_ULTIMATE.start_main_~#s~0#1.base|)))) |c_ULTIMATE.start_main_~#s~0#1.base| v_ArrVal_2506) (select v_ArrVal_2506 |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (or (= (select .cse8 (select .cse26 v_arrayElimCell_904)) 1) (= (select .cse8 (select .cse26 v_arrayElimCell_906)) 1)))))) (forall ((|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| Int)) (or (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_ArrVal_2511 (Array Int Int)) (v_arrayElimCell_907 Int)) (let ((.cse30 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2511))) (let ((.cse31 (select (select .cse30 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (= (select (store |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| 1) (select (let ((.cse29 (store (store .cse30 .cse31 (store (select .cse30 .cse31) v_arrayElimCell_904 |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|)) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2506))) (select .cse29 (select (select .cse29 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_907)) 1) (not (= .cse31 |c_ULTIMATE.start_main_~#s~0#1.base|)))))) (= |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|) 0)) (not (< |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_#StackHeapBarrier|)))) (forall ((|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| Int)) (or (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_ArrVal_2511 (Array Int Int)) (v_arrayElimCell_907 Int)) (let ((.cse32 (store |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| 1)) (.cse33 (let ((.cse34 (store (let ((.cse35 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2511))) (let ((.cse36 (select (select .cse35 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (store .cse35 .cse36 (store (select .cse35 .cse36) v_arrayElimCell_904 |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|)))) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2506))) (select .cse34 (select (select .cse34 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select .cse32 (select .cse33 v_arrayElimCell_904)) 1) (= (select .cse32 (select .cse33 v_arrayElimCell_907)) 1)))) (= |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|) 0)) (not (< |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_#StackHeapBarrier|)))) (forall ((|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| Int)) (or (= |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|) 0)) (not (< |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_2506 (Array Int Int)) (v_arrayElimCell_904 Int) (v_ArrVal_2511 (Array Int Int))) (let ((.cse38 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2511))) (let ((.cse39 (select (select .cse38 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (= (select (store |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| 1) (select (let ((.cse37 (store (store .cse38 .cse39 (store (select .cse38 .cse39) v_arrayElimCell_904 |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45|)) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_45| v_ArrVal_2506))) (select .cse37 (select (select .cse37 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) v_arrayElimCell_904)) 1) (= .cse39 |c_ULTIMATE.start_main_~#s~0#1.base|))))))) (or (= |c_ULTIMATE.start_main_~#s~0#1.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.offset|) .cse15)))) is different from false [2022-11-16 15:56:08,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505747943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:56:08,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176668795] [2022-11-16 15:56:08,034 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-16 15:56:08,034 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:56:08,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:56:08,034 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:56:08,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:56:08,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:08,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:08,056 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 [2022-11-16 15:56:08,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:08,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:08,084 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 [2022-11-16 15:56:08,095 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 [2022-11-16 15:56:08,099 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 [2022-11-16 15:56:08,105 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 [2022-11-16 15:56:08,109 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 [2022-11-16 15:56:08,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:56:08,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:08,123 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 27 treesize of output 11 [2022-11-16 15:56:08,127 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 [2022-11-16 15:56:08,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:08,133 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 27 treesize of output 11 [2022-11-16 15:56:08,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:08,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:08,164 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 [2022-11-16 15:56:08,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:08,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:08,189 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 [2022-11-16 15:56:08,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:08,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:08,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 15:56:08,312 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:56:08,312 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 208 treesize of output 197 [2022-11-16 15:56:08,484 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 [2022-11-16 15:56:08,492 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 [2022-11-16 15:56:08,501 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 [2022-11-16 15:56:08,510 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 [2022-11-16 15:56:08,521 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 [2022-11-16 15:56:08,535 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:08,537 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:08,538 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:08,539 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:08,595 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:56:08,595 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 208 treesize of output 197 [2022-11-16 15:56:08,779 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 [2022-11-16 15:56:08,789 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 [2022-11-16 15:56:08,799 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 [2022-11-16 15:56:08,811 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 [2022-11-16 15:56:08,822 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 [2022-11-16 15:56:08,835 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:08,836 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:08,838 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:08,839 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:08,842 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:08,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:08,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:08,923 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 250 treesize of output 234 [2022-11-16 15:56:08,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:08,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 236 [2022-11-16 15:56:08,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:08,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 244 [2022-11-16 15:56:09,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:09,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:09,088 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 136 treesize of output 120 [2022-11-16 15:56:09,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:09,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 122 [2022-11-16 15:56:09,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:09,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 114 [2022-11-16 15:56:09,232 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 [2022-11-16 15:56:09,243 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 [2022-11-16 15:56:09,258 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 [2022-11-16 15:56:09,301 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 7 treesize of output 5 [2022-11-16 15:56:09,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:09,315 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:56:09,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:56:09,326 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 [2022-11-16 15:56:09,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:09,342 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:56:09,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:56:09,390 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 7 treesize of output 5 [2022-11-16 15:56:09,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:09,407 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:56:09,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:56:09,418 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 [2022-11-16 15:56:09,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:09,432 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:56:09,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:56:09,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:09,755 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-16 15:56:09,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 194 treesize of output 188 [2022-11-16 15:56:09,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:09,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:09,816 INFO L321 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-11-16 15:56:09,817 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 3 new quantified variables, introduced 8 case distinctions, treesize of input 215 treesize of output 209 [2022-11-16 15:56:09,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:09,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:09,884 INFO L321 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2022-11-16 15:56:09,884 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 3 new quantified variables, introduced 8 case distinctions, treesize of input 211 treesize of output 197 [2022-11-16 15:56:10,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:10,160 INFO L321 Elim1Store]: treesize reduction 59, result has 32.2 percent of original size [2022-11-16 15:56:10,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 369 treesize of output 364 [2022-11-16 15:56:10,204 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 15:56:10,205 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 358 treesize of output 336 [2022-11-16 15:56:10,223 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 315 treesize of output 297 [2022-11-16 15:56:10,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:10,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:10,899 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 [2022-11-16 15:56:10,909 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 13 for LOIs [2022-11-16 15:56:10,916 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 [2022-11-16 15:56:10,920 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 [2022-11-16 15:56:10,930 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 [2022-11-16 15:56:10,935 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 [2022-11-16 15:56:10,940 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 [2022-11-16 15:56:10,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:10,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-16 15:56:10,957 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 [2022-11-16 15:56:10,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:10,964 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 27 treesize of output 11 [2022-11-16 15:56:10,967 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:56:21,689 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9130#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= |ULTIMATE.start_main_~uneq~0#1| 5) (<= 5 |ULTIMATE.start_sll_circular_append_#in~data#1|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 5 |ULTIMATE.start_main_~uneq~0#1|) (<= |ULTIMATE.start_sll_circular_append_~data#1| 5) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.base|) (<= |ULTIMATE.start_sll_circular_append_#in~data#1| 5) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_main_~count~0#1| 0) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.base|) (not (= (select |#valid| |ULTIMATE.start_main_~last~2#1.base|) 1)) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_sll_circular_append_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_append_~last~1#1.offset|) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (<= 5 |ULTIMATE.start_sll_circular_append_~data#1|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_sll_circular_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|))' at error location [2022-11-16 15:56:21,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:56:21,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:56:21,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 41 [2022-11-16 15:56:21,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106743431] [2022-11-16 15:56:21,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:56:21,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 15:56:21,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:56:21,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 15:56:21,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=4806, Unknown=39, NotChecked=572, Total=5700 [2022-11-16 15:56:21,692 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 41 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 34 states have internal predecessors, (72), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 15:56:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:56:23,342 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-11-16 15:56:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 15:56:23,343 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 34 states have internal predecessors, (72), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-11-16 15:56:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:56:23,343 INFO L225 Difference]: With dead ends: 77 [2022-11-16 15:56:23,344 INFO L226 Difference]: Without dead ends: 77 [2022-11-16 15:56:23,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=390, Invalid=6891, Unknown=45, NotChecked=684, Total=8010 [2022-11-16 15:56:23,345 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 38 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 15:56:23,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 800 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 789 Invalid, 0 Unknown, 102 Unchecked, 0.6s Time] [2022-11-16 15:56:23,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-16 15:56:23,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-16 15:56:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.462962962962963) internal successors, (79), 72 states have internal predecessors, (79), 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) [2022-11-16 15:56:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2022-11-16 15:56:23,347 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 43 [2022-11-16 15:56:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:56:23,347 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2022-11-16 15:56:23,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 34 states have internal predecessors, (72), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 15:56:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2022-11-16 15:56:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 15:56:23,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:56:23,348 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:56:23,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 15:56:23,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 15:56:23,548 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:56:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:56:23,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1089722523, now seen corresponding path program 1 times [2022-11-16 15:56:23,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:56:23,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239054919] [2022-11-16 15:56:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:56:23,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:56:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:56:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 15:56:24,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:56:24,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239054919] [2022-11-16 15:56:24,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239054919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:56:24,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767462152] [2022-11-16 15:56:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:56:24,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:56:24,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:56:24,358 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:56:24,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 15:56:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:56:24,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 15:56:24,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:56:24,725 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 [2022-11-16 15:56:24,943 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 [2022-11-16 15:56:25,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:25,144 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 [2022-11-16 15:56:25,163 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-16 15:56:25,163 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 21 treesize of output 29 [2022-11-16 15:56:25,522 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-16 15:56:25,522 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 29 treesize of output 32 [2022-11-16 15:56:25,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:25,678 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-16 15:56:25,679 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 50 treesize of output 55 [2022-11-16 15:56:25,714 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 [2022-11-16 15:56:25,882 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 69 treesize of output 45 [2022-11-16 15:56:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 15:56:25,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:56:25,959 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2654 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2654) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2022-11-16 15:56:28,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767462152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:56:28,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1565715601] [2022-11-16 15:56:28,479 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-11-16 15:56:28,479 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:56:28,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:56:28,480 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:56:28,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:56:28,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,502 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 [2022-11-16 15:56:28,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,533 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 [2022-11-16 15:56:28,543 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 [2022-11-16 15:56:28,547 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 [2022-11-16 15:56:28,553 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 [2022-11-16 15:56:28,558 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 [2022-11-16 15:56:28,562 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 [2022-11-16 15:56:28,569 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 [2022-11-16 15:56:28,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,576 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 27 treesize of output 11 [2022-11-16 15:56:28,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,583 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 27 treesize of output 11 [2022-11-16 15:56:28,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,605 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 [2022-11-16 15:56:28,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,631 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 [2022-11-16 15:56:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,657 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 [2022-11-16 15:56:28,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,712 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:56:28,712 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 [2022-11-16 15:56:28,738 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 [2022-11-16 15:56:28,747 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 [2022-11-16 15:56:28,756 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 [2022-11-16 15:56:28,765 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 [2022-11-16 15:56:28,780 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 [2022-11-16 15:56:28,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,804 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:56:28,805 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 [2022-11-16 15:56:28,845 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 [2022-11-16 15:56:28,855 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 [2022-11-16 15:56:28,864 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 [2022-11-16 15:56:28,876 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 [2022-11-16 15:56:28,887 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 [2022-11-16 15:56:28,921 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 19 treesize of output 11 [2022-11-16 15:56:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:28,937 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 [2022-11-16 15:56:28,946 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 19 treesize of output 11 [2022-11-16 15:56:29,038 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:56:29,038 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 233 treesize of output 222 [2022-11-16 15:56:29,152 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:29,154 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:29,156 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:29,158 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:29,170 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 [2022-11-16 15:56:29,179 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 [2022-11-16 15:56:29,189 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 [2022-11-16 15:56:29,199 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 [2022-11-16 15:56:29,210 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 [2022-11-16 15:56:29,312 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:56:29,312 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 233 treesize of output 222 [2022-11-16 15:56:29,462 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 [2022-11-16 15:56:29,472 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 [2022-11-16 15:56:29,482 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 [2022-11-16 15:56:29,492 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 [2022-11-16 15:56:29,506 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 [2022-11-16 15:56:29,521 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:29,524 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:29,526 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:29,528 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:29,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:29,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:29,640 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 250 treesize of output 234 [2022-11-16 15:56:29,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:29,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 236 [2022-11-16 15:56:29,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:29,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 244 [2022-11-16 15:56:29,778 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:56:29,778 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 233 treesize of output 222 [2022-11-16 15:56:29,956 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:29,958 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:29,960 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:29,962 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:29,973 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 [2022-11-16 15:56:29,981 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 [2022-11-16 15:56:29,991 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 [2022-11-16 15:56:30,000 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 [2022-11-16 15:56:30,012 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 [2022-11-16 15:56:30,099 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:56:30,100 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 233 treesize of output 222 [2022-11-16 15:56:30,321 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:30,323 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:30,324 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:30,327 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:30,329 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:56:30,340 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 [2022-11-16 15:56:30,349 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 [2022-11-16 15:56:30,358 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 [2022-11-16 15:56:30,367 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 [2022-11-16 15:56:30,380 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 [2022-11-16 15:56:30,493 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:56:30,494 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 233 treesize of output 222 [2022-11-16 15:56:30,723 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 15:56:30,724 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 15:56:30,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:30,739 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 23 treesize of output 11 [2022-11-16 15:56:30,773 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 15:56:30,774 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 15:56:30,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:30,812 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:56:30,812 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 [2022-11-16 15:56:30,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:56:30,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 15:56:30,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:30,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:30,895 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:56:30,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-16 15:56:30,908 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 [2022-11-16 15:56:30,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:30,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:30,929 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:56:30,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-16 15:56:30,966 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:56:30,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:56:31,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:31,016 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:56:31,016 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 [2022-11-16 15:56:31,068 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 [2022-11-16 15:56:31,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:56:31,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 15:56:31,114 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:56:31,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:56:31,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:31,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:31,136 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:56:31,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-16 15:56:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:31,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:31,160 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:56:31,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-16 15:56:31,589 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 [2022-11-16 15:56:31,600 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 [2022-11-16 15:56:31,610 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 [2022-11-16 15:56:31,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:31,685 INFO L321 Elim1Store]: treesize reduction 32, result has 52.2 percent of original size [2022-11-16 15:56:31,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 45 [2022-11-16 15:56:31,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:56:31,753 INFO L321 Elim1Store]: treesize reduction 32, result has 52.2 percent of original size [2022-11-16 15:56:31,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 45 [2022-11-16 15:56:31,777 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 [2022-11-16 15:56:31,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:31,957 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 15:56:31,957 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 [2022-11-16 15:56:31,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:31,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:31,990 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 [2022-11-16 15:56:32,000 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 21 for LOIs [2022-11-16 15:56:32,046 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 [2022-11-16 15:56:32,051 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 [2022-11-16 15:56:32,065 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 [2022-11-16 15:56:32,071 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 [2022-11-16 15:56:32,078 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 [2022-11-16 15:56:32,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:32,091 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 27 treesize of output 11 [2022-11-16 15:56:32,097 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 [2022-11-16 15:56:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:32,111 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 27 treesize of output 11 [2022-11-16 15:56:32,114 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:56:41,658 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9563#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) (<= |ULTIMATE.start_main_~uneq~0#1| 5) (<= 5 |ULTIMATE.start_sll_circular_append_#in~data#1|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 5 |ULTIMATE.start_main_~uneq~0#1|) (<= |ULTIMATE.start_sll_circular_append_~data#1| 5) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 1 |ULTIMATE.start_sll_circular_create_~len#1|) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (<= |ULTIMATE.start_sll_circular_append_#in~data#1| 5) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_main_~count~0#1| 0) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.base|) (<= (+ |ULTIMATE.start_main_~#s~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (<= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~last~2#1.base|) 1)) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_sll_circular_append_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_append_~last~1#1.offset|) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (<= 5 |ULTIMATE.start_sll_circular_append_~data#1|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_main_~last~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_sll_circular_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~last~2#1.offset|))' at error location [2022-11-16 15:56:41,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:56:41,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:56:41,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2022-11-16 15:56:41,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049243411] [2022-11-16 15:56:41,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:56:41,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 15:56:41,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:56:41,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 15:56:41,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=3837, Unknown=25, NotChecked=126, Total=4290 [2022-11-16 15:56:41,660 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 35 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 30 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 15:56:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:56:42,283 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2022-11-16 15:56:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 15:56:42,284 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 30 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2022-11-16 15:56:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:56:42,284 INFO L225 Difference]: With dead ends: 78 [2022-11-16 15:56:42,284 INFO L226 Difference]: Without dead ends: 78 [2022-11-16 15:56:42,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=350, Invalid=4320, Unknown=26, NotChecked=134, Total=4830 [2022-11-16 15:56:42,286 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 59 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 15:56:42,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 695 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 555 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2022-11-16 15:56:42,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-16 15:56:42,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-16 15:56:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 73 states have internal predecessors, (81), 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) [2022-11-16 15:56:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2022-11-16 15:56:42,289 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 43 [2022-11-16 15:56:42,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:56:42,289 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2022-11-16 15:56:42,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 30 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 15:56:42,290 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2022-11-16 15:56:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 15:56:42,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:56:42,290 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:56:42,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 15:56:42,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:56:42,496 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:56:42,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:56:42,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1089722524, now seen corresponding path program 1 times [2022-11-16 15:56:42,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:56:42,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57441874] [2022-11-16 15:56:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:56:42,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:56:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:56:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:56:43,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:56:43,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57441874] [2022-11-16 15:56:43,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57441874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:56:43,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777916735] [2022-11-16 15:56:43,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:56:43,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:56:43,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:56:43,986 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:56:44,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 15:56:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:56:44,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-16 15:56:44,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:56:44,326 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 [2022-11-16 15:56:44,643 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 [2022-11-16 15:56:44,647 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 [2022-11-16 15:56:44,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:44,951 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 [2022-11-16 15:56:44,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:44,962 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 [2022-11-16 15:56:44,987 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 15:56:44,988 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 16 treesize of output 26 [2022-11-16 15:56:45,008 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 15:56:45,008 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 [2022-11-16 15:56:46,154 INFO L321 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2022-11-16 15:56:46,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 64 [2022-11-16 15:56:46,189 INFO L321 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2022-11-16 15:56:46,189 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 3 case distinctions, treesize of input 67 treesize of output 56 [2022-11-16 15:56:46,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:46,557 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-16 15:56:46,557 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 115 treesize of output 114 [2022-11-16 15:56:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:56:46,633 INFO L321 Elim1Store]: treesize reduction 78, result has 41.8 percent of original size [2022-11-16 15:56:46,634 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 120 treesize of output 149 [2022-11-16 15:56:46,771 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 7 treesize of output 3 [2022-11-16 15:56:48,227 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 7 treesize of output 3 [2022-11-16 15:56:48,248 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 7 treesize of output 3 [2022-11-16 15:57:05,960 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 114 treesize of output 86 [2022-11-16 15:57:06,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:57:06,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 129 [2022-11-16 15:57:06,093 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 [2022-11-16 15:57:06,397 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 [2022-11-16 15:57:06,408 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 [2022-11-16 15:57:06,564 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 88 treesize of output 80 [2022-11-16 15:57:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:57:06,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:57:13,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777916735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:57:13,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [225283914] [2022-11-16 15:57:13,676 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-11-16 15:57:13,676 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:57:13,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:57:13,676 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:57:13,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:57:13,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:13,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:13,700 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 [2022-11-16 15:57:13,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:13,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:13,729 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 [2022-11-16 15:57:13,743 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 [2022-11-16 15:57:13,748 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 [2022-11-16 15:57:13,758 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 [2022-11-16 15:57:13,764 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 [2022-11-16 15:57:13,770 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 [2022-11-16 15:57:13,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:13,781 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 27 treesize of output 11 [2022-11-16 15:57:13,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:13,790 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 27 treesize of output 11 [2022-11-16 15:57:13,796 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 [2022-11-16 15:57:13,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:13,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:13,824 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 [2022-11-16 15:57:13,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:13,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:13,855 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 [2022-11-16 15:57:13,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:13,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:13,883 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 [2022-11-16 15:57:13,987 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:57:13,987 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 208 treesize of output 197 [2022-11-16 15:57:14,181 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 13 treesize of output 9 [2022-11-16 15:57:14,192 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 [2022-11-16 15:57:14,203 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 [2022-11-16 15:57:14,217 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 9 treesize of output 3 [2022-11-16 15:57:14,228 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 [2022-11-16 15:57:14,241 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:57:14,243 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:57:14,244 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:57:14,245 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:57:14,247 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:57:14,361 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 15:57:14,361 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 208 treesize of output 197 [2022-11-16 15:57:14,539 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 [2022-11-16 15:57:14,550 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 [2022-11-16 15:57:14,563 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 [2022-11-16 15:57:14,573 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 [2022-11-16 15:57:14,582 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 [2022-11-16 15:57:14,595 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:57:14,597 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:57:14,599 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:57:14,600 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 15:57:14,653 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 19 treesize of output 11 [2022-11-16 15:57:14,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:14,666 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 [2022-11-16 15:57:14,678 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 19 treesize of output 11 [2022-11-16 15:57:14,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:14,855 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 151 treesize of output 133 [2022-11-16 15:57:14,868 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 0 case distinctions, treesize of input 147 treesize of output 135 [2022-11-16 15:57:14,879 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 0 case distinctions, treesize of input 139 treesize of output 127 [2022-11-16 15:57:15,118 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 [2022-11-16 15:57:15,137 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 [2022-11-16 15:57:15,152 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 [2022-11-16 15:57:15,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:57:15,261 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:57:15,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:57:15,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:57:15,284 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:57:15,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:57:15,298 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 [2022-11-16 15:57:15,312 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 7 treesize of output 5 [2022-11-16 15:57:15,435 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 [2022-11-16 15:57:15,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:57:15,460 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:57:15,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:57:15,476 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 7 treesize of output 5 [2022-11-16 15:57:15,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:57:15,498 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:57:15,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:57:16,077 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 [2022-11-16 15:57:16,087 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 [2022-11-16 15:57:16,097 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 [2022-11-16 15:57:16,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:57:16,202 INFO L321 Elim1Store]: treesize reduction 32, result has 52.2 percent of original size [2022-11-16 15:57:16,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 45 [2022-11-16 15:57:16,221 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 [2022-11-16 15:57:16,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:57:16,310 INFO L321 Elim1Store]: treesize reduction 32, result has 52.2 percent of original size [2022-11-16 15:57:16,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 45 [2022-11-16 15:57:16,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:16,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:16,624 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 [2022-11-16 15:57:16,633 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 21 for LOIs [2022-11-16 15:57:16,642 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 [2022-11-16 15:57:16,648 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 [2022-11-16 15:57:16,666 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 11 treesize of output 7 [2022-11-16 15:57:16,671 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 [2022-11-16 15:57:16,677 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 [2022-11-16 15:57:16,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:16,695 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 27 treesize of output 11 [2022-11-16 15:57:16,703 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 [2022-11-16 15:57:16,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:16,713 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 27 treesize of output 11 [2022-11-16 15:57:16,715 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:57:29,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9991#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= |ULTIMATE.start_main_~uneq~0#1| 5) (<= 5 |ULTIMATE.start_sll_circular_append_#in~data#1|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 5 |ULTIMATE.start_main_~uneq~0#1|) (<= |ULTIMATE.start_sll_circular_append_~data#1| 5) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (<= |ULTIMATE.start_sll_circular_append_#in~data#1| 5) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_append_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_main_~count~0#1| 0) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.base|) (<= (+ |ULTIMATE.start_main_~#s~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (or (not (<= (+ |ULTIMATE.start_main_~last~2#1.offset| 4) (select |#length| |ULTIMATE.start_main_~last~2#1.base|))) (not (<= 0 |ULTIMATE.start_main_~last~2#1.offset|))) (<= 0 |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_sll_circular_append_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_append_~last~1#1.offset|) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (<= 5 |ULTIMATE.start_sll_circular_append_~data#1|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_circular_append_~head#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_main_~last~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_sll_circular_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~last~2#1.offset|))' at error location [2022-11-16 15:57:29,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:57:29,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:57:29,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 43 [2022-11-16 15:57:29,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943416609] [2022-11-16 15:57:29,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:57:29,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 15:57:29,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:57:29,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 15:57:29,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=6057, Unknown=7, NotChecked=0, Total=6480 [2022-11-16 15:57:29,501 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 44 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 38 states have internal predecessors, (70), 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) [2022-11-16 15:57:31,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:57:31,894 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-11-16 15:57:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 15:57:31,895 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 38 states have internal predecessors, (70), 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 43 [2022-11-16 15:57:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:57:31,895 INFO L225 Difference]: With dead ends: 78 [2022-11-16 15:57:31,895 INFO L226 Difference]: Without dead ends: 78 [2022-11-16 15:57:31,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3355 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=599, Invalid=8134, Unknown=9, NotChecked=0, Total=8742 [2022-11-16 15:57:31,897 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 19 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 15:57:31,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 868 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 343 Invalid, 0 Unknown, 136 Unchecked, 0.4s Time] [2022-11-16 15:57:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-16 15:57:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-16 15:57:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 73 states have internal predecessors, (80), 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) [2022-11-16 15:57:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-11-16 15:57:31,900 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 43 [2022-11-16 15:57:31,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:57:31,901 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-11-16 15:57:31,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 38 states have internal predecessors, (70), 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) [2022-11-16 15:57:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-11-16 15:57:31,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 15:57:31,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:57:31,902 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:57:31,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 15:57:32,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:57:32,108 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2022-11-16 15:57:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:57:32,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1734040074, now seen corresponding path program 1 times [2022-11-16 15:57:32,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:57:32,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514139864] [2022-11-16 15:57:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:57:32,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:57:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:57:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:57:34,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:57:34,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514139864] [2022-11-16 15:57:34,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514139864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:57:34,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589941292] [2022-11-16 15:57:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:57:34,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:57:34,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:57:34,264 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:57:34,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c141999-d25f-4f79-aa4a-48942a201e3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 15:57:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:57:34,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-16 15:57:34,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:57:34,562 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 [2022-11-16 15:57:34,622 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 [2022-11-16 15:57:34,663 WARN L855 $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_2956 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_2956))))) is different from true [2022-11-16 15:57:34,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:34,704 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 [2022-11-16 15:57:34,730 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 [2022-11-16 15:57:34,745 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 [2022-11-16 15:57:34,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:34,949 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 [2022-11-16 15:57:35,396 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 [2022-11-16 15:57:35,402 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 [2022-11-16 15:57:35,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:35,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:57:35,414 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 [2022-11-16 15:57:35,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:35,842 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 [2022-11-16 15:57:35,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:35,853 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 34 treesize of output 32 [2022-11-16 15:57:35,873 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 15:57:35,873 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 [2022-11-16 15:57:35,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:35,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:35,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-16 15:57:37,158 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-16 15:57:37,158 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 91 treesize of output 73 [2022-11-16 15:57:37,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:37,222 INFO L321 Elim1Store]: treesize reduction 36, result has 42.9 percent of original size [2022-11-16 15:57:37,222 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 57 [2022-11-16 15:57:38,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:38,102 INFO L321 Elim1Store]: treesize reduction 36, result has 42.9 percent of original size [2022-11-16 15:57:38,102 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 235 treesize of output 236 [2022-11-16 15:57:38,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:57:38,231 INFO L321 Elim1Store]: treesize reduction 78, result has 41.8 percent of original size [2022-11-16 15:57:38,232 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 227 treesize of output 240 [2022-11-16 15:57:39,644 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 180 treesize of output 176 [2022-11-16 15:57:42,387 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 17 treesize of output 7 [2022-11-16 15:57:42,799 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 17 treesize of output 7 [2022-11-16 15:57:42,823 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 17 treesize of output 7 [2022-11-16 15:57:42,910 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 17 treesize of output 7 [2022-11-16 15:57:49,919 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 17 treesize of output 7 [2022-11-16 15:57:50,265 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 17 treesize of output 7 [2022-11-16 15:57:50,608 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 17 treesize of output 7 [2022-11-16 15:57:50,644 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 17 treesize of output 7 [2022-11-16 15:58:09,431 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 288 DAG size of output: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 15:58:10,428 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-11-16 15:58:10,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 375 treesize of output 253 [2022-11-16 15:58:10,869 INFO L321 Elim1Store]: treesize reduction 72, result has 69.6 percent of original size [2022-11-16 15:58:10,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 262 treesize of output 360