./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI --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 8d477dcc38abb71f88978d460e8393ef9ba09f24c134f3de362c4df2a3599c9a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:45:59,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:45:59,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:45:59,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:45:59,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:45:59,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:45:59,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:45:59,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:45:59,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:45:59,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:45:59,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:45:59,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:45:59,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:45:59,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:45:59,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:45:59,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:45:59,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:45:59,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:45:59,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:45:59,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:45:59,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:45:59,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:45:59,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:45:59,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:45:59,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:45:59,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:45:59,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:45:59,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:45:59,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:45:59,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:45:59,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:45:59,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:45:59,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:45:59,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:45:59,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:45:59,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:45:59,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:45:59,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:45:59,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:45:59,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:45:59,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:45:59,202 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 02:45:59,241 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:45:59,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:45:59,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:45:59,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:45:59,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:45:59,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:45:59,243 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:45:59,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:45:59,244 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:45:59,244 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:45:59,245 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:45:59,245 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:45:59,245 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:45:59,246 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:45:59,246 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:45:59,246 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:45:59,246 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:45:59,246 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:45:59,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 02:45:59,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 02:45:59,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:45:59,249 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:45:59,249 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:45:59,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:45:59,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:45:59,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:45:59,250 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 02:45:59,250 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 02:45:59,250 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 02:45:59,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:45:59,251 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:45:59,251 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:45:59,251 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:45:59,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:45:59,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:45:59,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:45:59,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:45:59,252 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:45:59,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:45:59,253 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:45:59,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:45:59,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:45:59,264 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_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d477dcc38abb71f88978d460e8393ef9ba09f24c134f3de362c4df2a3599c9a [2022-11-03 02:45:59,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:45:59,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:45:59,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:45:59,579 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:45:59,580 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:45:59,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2022-11-03 02:45:59,645 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/data/14689a776/9e723db885bb4814ac73246e17dfab98/FLAGb3e7c34fb [2022-11-03 02:46:00,145 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:46:00,146 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2022-11-03 02:46:00,159 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/data/14689a776/9e723db885bb4814ac73246e17dfab98/FLAGb3e7c34fb [2022-11-03 02:46:00,473 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/data/14689a776/9e723db885bb4814ac73246e17dfab98 [2022-11-03 02:46:00,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:46:00,480 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:46:00,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:46:00,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:46:00,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:46:00,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:46:00" (1/1) ... [2022-11-03 02:46:00,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190ed2f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:00, skipping insertion in model container [2022-11-03 02:46:00,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:46:00" (1/1) ... [2022-11-03 02:46:00,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:46:00,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:46:00,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:46:00,969 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:46:01,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:46:01,047 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:46:01,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:01 WrapperNode [2022-11-03 02:46:01,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:46:01,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:46:01,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:46:01,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:46:01,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:01" (1/1) ... [2022-11-03 02:46:01,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:01" (1/1) ... [2022-11-03 02:46:01,090 INFO L138 Inliner]: procedures = 123, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 97 [2022-11-03 02:46:01,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:46:01,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:46:01,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:46:01,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:46:01,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:01" (1/1) ... [2022-11-03 02:46:01,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:01" (1/1) ... [2022-11-03 02:46:01,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:01" (1/1) ... [2022-11-03 02:46:01,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:01" (1/1) ... [2022-11-03 02:46:01,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:01" (1/1) ... [2022-11-03 02:46:01,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:01" (1/1) ... [2022-11-03 02:46:01,136 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:01" (1/1) ... [2022-11-03 02:46:01,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:01" (1/1) ... [2022-11-03 02:46:01,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:46:01,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:46:01,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:46:01,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:46:01,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:01" (1/1) ... [2022-11-03 02:46:01,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:46:01,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:01,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:46:01,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:46:01,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:46:01,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:46:01,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:46:01,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:46:01,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:46:01,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:46:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:46:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:46:01,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:46:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure append [2022-11-03 02:46:01,238 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2022-11-03 02:46:01,367 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:46:01,369 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:46:01,864 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:46:01,918 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:46:01,918 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 02:46:01,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:46:01 BoogieIcfgContainer [2022-11-03 02:46:01,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:46:01,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:46:01,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:46:01,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:46:01,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:46:00" (1/3) ... [2022-11-03 02:46:01,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac1c486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:46:01, skipping insertion in model container [2022-11-03 02:46:01,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:01" (2/3) ... [2022-11-03 02:46:01,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac1c486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:46:01, skipping insertion in model container [2022-11-03 02:46:01,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:46:01" (3/3) ... [2022-11-03 02:46:01,930 INFO L112 eAbstractionObserver]: Analyzing ICFG length_test03-2.i [2022-11-03 02:46:01,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:46:01,948 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2022-11-03 02:46:02,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:46:02,015 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;@c72d1a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:46:02,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2022-11-03 02:46:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 108 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:46:02,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-03 02:46:02,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:02,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-03 02:46:02,026 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:46:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:02,031 INFO L85 PathProgramCache]: Analyzing trace with hash 6793, now seen corresponding path program 1 times [2022-11-03 02:46:02,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:02,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175151397] [2022-11-03 02:46:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:02,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:02,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:02,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175151397] [2022-11-03 02:46:02,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175151397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:02,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:02,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:46:02,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366472480] [2022-11-03 02:46:02,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:02,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:46:02,341 INFO L87 Difference]: Start difference. First operand has 112 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 108 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:02,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:02,630 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2022-11-03 02:46:02,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:02,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-03 02:46:02,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:02,654 INFO L225 Difference]: With dead ends: 144 [2022-11-03 02:46:02,654 INFO L226 Difference]: Without dead ends: 143 [2022-11-03 02:46:02,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:46:02,665 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 44 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:02,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 131 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:46:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-03 02:46:02,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 109. [2022-11-03 02:46:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 105 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:46:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2022-11-03 02:46:02,711 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 2 [2022-11-03 02:46:02,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:02,712 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2022-11-03 02:46:02,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2022-11-03 02:46:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-03 02:46:02,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:02,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-03 02:46:02,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:46:02,714 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:46:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash 6794, now seen corresponding path program 1 times [2022-11-03 02:46:02,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:02,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703940322] [2022-11-03 02:46:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:02,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:02,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:02,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703940322] [2022-11-03 02:46:02,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703940322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:02,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:02,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:46:02,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786340946] [2022-11-03 02:46:02,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:02,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:02,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:02,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:02,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:46:02,812 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:02,929 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2022-11-03 02:46:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:02,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-03 02:46:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:02,931 INFO L225 Difference]: With dead ends: 109 [2022-11-03 02:46:02,931 INFO L226 Difference]: Without dead ends: 109 [2022-11-03 02:46:02,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:46:02,933 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:02,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 146 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:46:02,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-03 02:46:02,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-11-03 02:46:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 103 states have internal predecessors, (109), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:46:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2022-11-03 02:46:02,943 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 2 [2022-11-03 02:46:02,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:02,944 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2022-11-03 02:46:02,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:02,944 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2022-11-03 02:46:02,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:46:02,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:02,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:46:02,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:46:02,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:46:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:02,946 INFO L85 PathProgramCache]: Analyzing trace with hash 6533168, now seen corresponding path program 1 times [2022-11-03 02:46:02,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:02,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565639109] [2022-11-03 02:46:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:02,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:03,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565639109] [2022-11-03 02:46:03,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565639109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:03,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:03,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:46:03,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144164281] [2022-11-03 02:46:03,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:03,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:03,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:03,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:03,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:46:03,021 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:03,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:03,124 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2022-11-03 02:46:03,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:03,125 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 02:46:03,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:03,126 INFO L225 Difference]: With dead ends: 122 [2022-11-03 02:46:03,126 INFO L226 Difference]: Without dead ends: 122 [2022-11-03 02:46:03,127 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 [2022-11-03 02:46:03,128 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 22 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:03,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:46:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-03 02:46:03,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2022-11-03 02:46:03,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 53 states have (on average 2.150943396226415) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:46:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2022-11-03 02:46:03,137 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 4 [2022-11-03 02:46:03,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:03,137 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2022-11-03 02:46:03,138 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:03,138 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2022-11-03 02:46:03,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:46:03,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:03,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:46:03,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:46:03,139 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:46:03,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:03,140 INFO L85 PathProgramCache]: Analyzing trace with hash 6533169, now seen corresponding path program 1 times [2022-11-03 02:46:03,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:03,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916004149] [2022-11-03 02:46:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:03,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:03,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916004149] [2022-11-03 02:46:03,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916004149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:03,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:03,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:46:03,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035331168] [2022-11-03 02:46:03,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:03,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:03,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:03,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:03,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:46:03,294 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:03,406 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2022-11-03 02:46:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:03,406 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 02:46:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:03,408 INFO L225 Difference]: With dead ends: 109 [2022-11-03 02:46:03,408 INFO L226 Difference]: Without dead ends: 109 [2022-11-03 02:46:03,408 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 [2022-11-03 02:46:03,410 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 3 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:03,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 144 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:46:03,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-03 02:46:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-11-03 02:46:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:46:03,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2022-11-03 02:46:03,419 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 4 [2022-11-03 02:46:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:03,420 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2022-11-03 02:46:03,420 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2022-11-03 02:46:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:46:03,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:03,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:03,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:46:03,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:46:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:03,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1960369197, now seen corresponding path program 1 times [2022-11-03 02:46:03,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:03,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353049946] [2022-11-03 02:46:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:03,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:03,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:03,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353049946] [2022-11-03 02:46:03,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353049946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:03,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:03,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:46:03,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178126163] [2022-11-03 02:46:03,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:03,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:03,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:46:03,595 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-03 02:46:03,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:03,686 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2022-11-03 02:46:03,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:03,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2022-11-03 02:46:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:03,693 INFO L225 Difference]: With dead ends: 102 [2022-11-03 02:46:03,693 INFO L226 Difference]: Without dead ends: 102 [2022-11-03 02:46:03,694 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 [2022-11-03 02:46:03,703 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 39 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:03,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 106 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:46:03,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-03 02:46:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-03 02:46:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 53 states have (on average 2.018867924528302) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:46:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2022-11-03 02:46:03,715 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 9 [2022-11-03 02:46:03,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:03,716 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2022-11-03 02:46:03,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-03 02:46:03,716 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2022-11-03 02:46:03,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:46:03,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:03,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:03,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:46:03,717 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:46:03,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:03,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1960369196, now seen corresponding path program 1 times [2022-11-03 02:46:03,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:03,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710346749] [2022-11-03 02:46:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:03,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:03,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:03,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710346749] [2022-11-03 02:46:03,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710346749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:03,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:03,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:46:03,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794759265] [2022-11-03 02:46:03,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:03,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:03,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:03,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:46:03,801 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-03 02:46:03,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:03,890 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-11-03 02:46:03,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:03,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2022-11-03 02:46:03,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:03,892 INFO L225 Difference]: With dead ends: 97 [2022-11-03 02:46:03,892 INFO L226 Difference]: Without dead ends: 97 [2022-11-03 02:46:03,893 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 [2022-11-03 02:46:03,897 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 34 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:03,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 98 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:46:03,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-03 02:46:03,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-03 02:46:03,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:46:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2022-11-03 02:46:03,922 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 9 [2022-11-03 02:46:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:03,923 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2022-11-03 02:46:03,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-03 02:46:03,924 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2022-11-03 02:46:03,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:46:03,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:03,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:03,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:46:03,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:46:03,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:03,926 INFO L85 PathProgramCache]: Analyzing trace with hash 641903031, now seen corresponding path program 1 times [2022-11-03 02:46:03,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:03,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608139780] [2022-11-03 02:46:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:03,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:04,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:04,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608139780] [2022-11-03 02:46:04,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608139780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:04,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:04,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:46:04,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775594858] [2022-11-03 02:46:04,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:04,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:46:04,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:04,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:46:04,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:04,272 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-03 02:46:04,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:04,580 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2022-11-03 02:46:04,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:46:04,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 10 [2022-11-03 02:46:04,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:04,582 INFO L225 Difference]: With dead ends: 191 [2022-11-03 02:46:04,582 INFO L226 Difference]: Without dead ends: 191 [2022-11-03 02:46:04,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:46:04,583 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 204 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:04,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 166 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:46:04,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-03 02:46:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 122. [2022-11-03 02:46:04,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.819277108433735) internal successors, (151), 117 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:46:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 155 transitions. [2022-11-03 02:46:04,594 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 155 transitions. Word has length 10 [2022-11-03 02:46:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:04,595 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 155 transitions. [2022-11-03 02:46:04,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-03 02:46:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 155 transitions. [2022-11-03 02:46:04,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:46:04,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:04,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:04,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:46:04,596 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:46:04,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:04,597 INFO L85 PathProgramCache]: Analyzing trace with hash 641903032, now seen corresponding path program 1 times [2022-11-03 02:46:04,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:04,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037367910] [2022-11-03 02:46:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:04,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:04,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:04,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037367910] [2022-11-03 02:46:04,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037367910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:04,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:04,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:46:04,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770299662] [2022-11-03 02:46:04,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:04,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:46:04,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:04,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:46:04,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:04,966 INFO L87 Difference]: Start difference. First operand 122 states and 155 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-03 02:46:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:05,270 INFO L93 Difference]: Finished difference Result 197 states and 216 transitions. [2022-11-03 02:46:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:46:05,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 10 [2022-11-03 02:46:05,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:05,272 INFO L225 Difference]: With dead ends: 197 [2022-11-03 02:46:05,272 INFO L226 Difference]: Without dead ends: 197 [2022-11-03 02:46:05,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:46:05,273 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 249 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:05,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 155 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:46:05,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-03 02:46:05,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 142. [2022-11-03 02:46:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 103 states have (on average 1.7864077669902914) internal successors, (184), 137 states have internal predecessors, (184), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:46:05,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 188 transitions. [2022-11-03 02:46:05,279 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 188 transitions. Word has length 10 [2022-11-03 02:46:05,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:05,280 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 188 transitions. [2022-11-03 02:46:05,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-03 02:46:05,280 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 188 transitions. [2022-11-03 02:46:05,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:46:05,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:05,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:05,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:46:05,282 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:46:05,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:05,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2032407541, now seen corresponding path program 1 times [2022-11-03 02:46:05,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:05,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594437096] [2022-11-03 02:46:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:05,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:05,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:05,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594437096] [2022-11-03 02:46:05,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594437096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:05,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:05,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:46:05,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24443006] [2022-11-03 02:46:05,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:05,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:46:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:46:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:46:05,806 INFO L87 Difference]: Start difference. First operand 142 states and 188 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-03 02:46:06,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:06,082 INFO L93 Difference]: Finished difference Result 197 states and 257 transitions. [2022-11-03 02:46:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:46:06,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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 17 [2022-11-03 02:46:06,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:06,084 INFO L225 Difference]: With dead ends: 197 [2022-11-03 02:46:06,085 INFO L226 Difference]: Without dead ends: 197 [2022-11-03 02:46:06,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:46:06,086 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 46 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:06,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 314 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:46:06,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-03 02:46:06,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 148. [2022-11-03 02:46:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 108 states have (on average 1.75) internal successors, (189), 142 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:46:06,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 195 transitions. [2022-11-03 02:46:06,116 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 195 transitions. Word has length 17 [2022-11-03 02:46:06,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:06,116 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 195 transitions. [2022-11-03 02:46:06,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-03 02:46:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 195 transitions. [2022-11-03 02:46:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:46:06,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:06,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:06,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:46:06,121 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:46:06,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:06,122 INFO L85 PathProgramCache]: Analyzing trace with hash 636810971, now seen corresponding path program 1 times [2022-11-03 02:46:06,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:06,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230575700] [2022-11-03 02:46:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:06,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:06,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:06,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230575700] [2022-11-03 02:46:06,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230575700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:06,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:06,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:46:06,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107738485] [2022-11-03 02:46:06,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:06,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:46:06,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:06,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:46:06,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:46:06,812 INFO L87 Difference]: Start difference. First operand 148 states and 195 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-11-03 02:46:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:07,146 INFO L93 Difference]: Finished difference Result 152 states and 199 transitions. [2022-11-03 02:46:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:46:07,146 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 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 18 [2022-11-03 02:46:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:07,147 INFO L225 Difference]: With dead ends: 152 [2022-11-03 02:46:07,148 INFO L226 Difference]: Without dead ends: 152 [2022-11-03 02:46:07,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:46:07,149 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 3 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:07,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 347 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:46:07,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-03 02:46:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2022-11-03 02:46:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 110 states have (on average 1.7363636363636363) internal successors, (191), 144 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:46:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 197 transitions. [2022-11-03 02:46:07,154 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 197 transitions. Word has length 18 [2022-11-03 02:46:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:07,154 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 197 transitions. [2022-11-03 02:46:07,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-11-03 02:46:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 197 transitions. [2022-11-03 02:46:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 02:46:07,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:07,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:07,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:46:07,156 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:46:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:07,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1812621737, now seen corresponding path program 1 times [2022-11-03 02:46:07,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:07,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107322969] [2022-11-03 02:46:07,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:07,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:07,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:07,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107322969] [2022-11-03 02:46:07,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107322969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:07,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:07,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:46:07,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366488413] [2022-11-03 02:46:07,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:07,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:07,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:07,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:07,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:46:07,229 INFO L87 Difference]: Start difference. First operand 150 states and 197 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-11-03 02:46:07,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:07,269 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2022-11-03 02:46:07,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:07,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 25 [2022-11-03 02:46:07,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:07,270 INFO L225 Difference]: With dead ends: 126 [2022-11-03 02:46:07,270 INFO L226 Difference]: Without dead ends: 126 [2022-11-03 02:46:07,271 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 [2022-11-03 02:46:07,271 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 10 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:07,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 146 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:46:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-03 02:46:07,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2022-11-03 02:46:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 75 states have (on average 1.5866666666666667) internal successors, (119), 109 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:46:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2022-11-03 02:46:07,276 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 25 [2022-11-03 02:46:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:07,277 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2022-11-03 02:46:07,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-11-03 02:46:07,277 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2022-11-03 02:46:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:46:07,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:07,278 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:46:07,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:46:07,278 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:46:07,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:07,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1974296479, now seen corresponding path program 1 times [2022-11-03 02:46:07,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:07,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27740084] [2022-11-03 02:46:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:07,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:07,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:07,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27740084] [2022-11-03 02:46:07,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27740084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:07,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698370264] [2022-11-03 02:46:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:07,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:07,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:07,656 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:07,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:46:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:07,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:46:07,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:07,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:46:08,227 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:46:08,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 02:46:08,266 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:46:08,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:46:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:08,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:08,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698370264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:08,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [24476663] [2022-11-03 02:46:08,429 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 02:46:08,429 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:46:08,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:46:08,442 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:46:08,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:46:08,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:46:08,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:46:08,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:46:08,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 02:46:08,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-03 02:46:08,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:46:08,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 02:46:08,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:46:08,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 02:46:08,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 02:46:08,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 02:46:08,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 02:46:08,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 02:46:08,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-03 02:46:08,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:08,933 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:46:08,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-03 02:46:08,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:46:08,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:46:08,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:46:08,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:46:08,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:46:09,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-03 02:46:09,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-03 02:46:09,079 INFO L356 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-03 02:46:09,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-03 02:46:09,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-03 02:46:09,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-03 02:46:09,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-03 02:46:09,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,222 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-03 02:46:09,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 02:46:09,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-03 02:46:09,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,294 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 02:46:09,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-03 02:46:09,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-03 02:46:09,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,378 INFO L356 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-03 02:46:09,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-03 02:46:09,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,441 INFO L356 Elim1Store]: treesize reduction 62, result has 30.3 percent of original size [2022-11-03 02:46:09,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 64 [2022-11-03 02:46:09,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-03 02:46:09,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-03 02:46:09,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-03 02:46:09,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:46:09,671 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:46:09,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-03 02:46:09,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-03 02:46:09,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-03 02:46:09,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-03 02:46:09,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:09,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:46:10,001 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:46:10,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-03 02:46:10,030 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 105 for LOIs [2022-11-03 02:46:11,891 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:46:40,498 WARN L234 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 229 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:00,905 WARN L234 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 238 DAG size of output: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:01,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3152#(and (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.offset| append_~node~0.base) append_~node~0.offset)))) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< append_~node~0.base |#StackHeapBarrier|) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= |append_#in~head.offset| 0) (= append_~head.base |append_#in~head.base|) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.base| append_~node~0.base) append_~node~0.offset)))) (= |#NULL.offset| 0) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (not (= (select |#valid| append_~head.base) 1)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:47:01,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:47:01,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:47:01,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2022-11-03 02:47:01,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578676031] [2022-11-03 02:47:01,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:01,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:47:01,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:01,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:47:01,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=889, Unknown=13, NotChecked=0, Total=1056 [2022-11-03 02:47:01,226 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:47:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:01,584 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2022-11-03 02:47:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:47:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-11-03 02:47:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:01,586 INFO L225 Difference]: With dead ends: 137 [2022-11-03 02:47:01,586 INFO L226 Difference]: Without dead ends: 137 [2022-11-03 02:47:01,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=191, Invalid=1056, Unknown=13, NotChecked=0, Total=1260 [2022-11-03 02:47:01,587 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 130 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:01,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 281 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 311 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-03 02:47:01,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-03 02:47:01,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2022-11-03 02:47:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 77 states have (on average 1.5844155844155845) internal successors, (122), 110 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:47:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2022-11-03 02:47:01,591 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 27 [2022-11-03 02:47:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:01,592 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2022-11-03 02:47:01,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:47:01,592 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2022-11-03 02:47:01,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:47:01,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:01,593 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:47:01,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:47:01,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:01,813 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:47:01,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:01,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1974296478, now seen corresponding path program 1 times [2022-11-03 02:47:01,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:01,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205403845] [2022-11-03 02:47:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:01,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:02,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:02,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205403845] [2022-11-03 02:47:02,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205403845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:02,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992593100] [2022-11-03 02:47:02,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:02,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:02,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:02,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:02,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:47:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:02,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:47:02,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:02,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:47:02,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:02,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 02:47:02,739 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:47:02,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 02:47:02,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:02,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 02:47:02,932 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-03 02:47:02,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 02:47:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:02,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:15,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992593100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:15,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870861884] [2022-11-03 02:47:15,513 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 02:47:15,513 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:47:15,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:47:15,513 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:47:15,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:47:15,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:15,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 02:47:15,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:15,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:15,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 02:47:15,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-03 02:47:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:47:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:47:15,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 02:47:15,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 02:47:15,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 02:47:15,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 02:47:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-03 02:47:15,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 02:47:15,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:15,833 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:47:15,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-03 02:47:15,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:47:15,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:47:15,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:15,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:15,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:15,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-03 02:47:15,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-03 02:47:15,951 INFO L356 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-03 02:47:15,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-03 02:47:15,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-03 02:47:15,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-03 02:47:15,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:15,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-03 02:47:16,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-03 02:47:16,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,034 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-03 02:47:16,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 02:47:16,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,078 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 02:47:16,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-03 02:47:16,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-03 02:47:16,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,151 INFO L356 Elim1Store]: treesize reduction 62, result has 30.3 percent of original size [2022-11-03 02:47:16,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 64 [2022-11-03 02:47:16,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,203 INFO L356 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-03 02:47:16,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-03 02:47:16,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-03 02:47:16,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-03 02:47:16,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-11-03 02:47:16,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,381 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:47:16,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-03 02:47:16,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-03 02:47:16,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-11-03 02:47:16,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-03 02:47:16,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:16,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:16,602 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:47:16,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-03 02:47:16,622 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 102 for LOIs [2022-11-03 02:47:18,028 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:47:48,913 WARN L234 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 226 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:48:08,193 WARN L234 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 235 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:48:08,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3557#(and (not (<= (+ append_~head.offset 4) (select |#length| append_~head.base))) (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.offset| append_~node~0.base) append_~node~0.offset)))) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< append_~node~0.base |#StackHeapBarrier|) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= |append_#in~head.offset| 0) (= append_~head.base |append_#in~head.base|) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.base| append_~node~0.base) append_~node~0.offset)))) (= |#NULL.offset| 0) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:48:08,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:48:08,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:48:08,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-03 02:48:08,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481024043] [2022-11-03 02:48:08,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:08,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:48:08,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:48:08,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:48:08,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1412, Unknown=14, NotChecked=0, Total=1640 [2022-11-03 02:48:08,555 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 12 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:48:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:08,952 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2022-11-03 02:48:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:48:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 12 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-03 02:48:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:08,955 INFO L225 Difference]: With dead ends: 147 [2022-11-03 02:48:08,955 INFO L226 Difference]: Without dead ends: 147 [2022-11-03 02:48:08,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 63.2s TimeCoverageRelationStatistics Valid=248, Invalid=1630, Unknown=14, NotChecked=0, Total=1892 [2022-11-03 02:48:08,959 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 51 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:08,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 396 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 290 Invalid, 0 Unknown, 115 Unchecked, 0.3s Time] [2022-11-03 02:48:08,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-03 02:48:08,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2022-11-03 02:48:08,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 100 states have (on average 1.5) internal successors, (150), 135 states have internal predecessors, (150), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:48:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 162 transitions. [2022-11-03 02:48:08,967 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 162 transitions. Word has length 27 [2022-11-03 02:48:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:08,968 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 162 transitions. [2022-11-03 02:48:08,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 12 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:48:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 162 transitions. [2022-11-03 02:48:08,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:48:08,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:08,978 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:09,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:09,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:09,193 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-03 02:48:09,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:09,193 INFO L85 PathProgramCache]: Analyzing trace with hash -936927503, now seen corresponding path program 1 times [2022-11-03 02:48:09,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:48:09,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660038960] [2022-11-03 02:48:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:09,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:48:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:10,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:48:10,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660038960] [2022-11-03 02:48:10,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660038960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:10,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604036496] [2022-11-03 02:48:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:10,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:10,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:10,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:10,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d55ce5-b4ff-4e69-83ed-37edd67ef5c2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:48:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:10,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:48:10,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:10,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:48:10,672 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:48:10,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 02:48:10,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:48:10,939 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:48:10,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-03 02:48:10,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:48:11,043 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:48:11,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 37 [2022-11-03 02:48:11,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:11,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:11,190 INFO L356 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-03 02:48:11,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:48:11,387 INFO L356 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-11-03 02:48:11,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 45 [2022-11-03 02:48:11,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-03 02:48:11,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-03 02:48:11,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-03 02:48:11,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:11,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-11-03 02:48:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:11,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:12,065 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:48:12,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2022-11-03 02:48:12,079 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:48:12,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 214 [2022-11-03 02:48:12,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2022-11-03 02:48:12,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 158 [2022-11-03 02:48:12,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604036496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:12,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68896023] [2022-11-03 02:48:12,510 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-03 02:48:12,510 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:48:12,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:48:12,511 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:48:12,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:48:12,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:12,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:12,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:12,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 02:48:12,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-03 02:48:12,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-03 02:48:12,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:48:12,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:48:12,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 02:48:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 02:48:12,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 02:48:12,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 02:48:12,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 02:48:12,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-03 02:48:12,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:12,803 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:48:12,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-03 02:48:12,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:48:12,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:48:12,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:12,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:12,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:12,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:48:12,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 02:48:12,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:48:12,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:48:12,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:48:12,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:48:12,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,924 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-03 02:48:12,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 02:48:12,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:12,953 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 02:48:12,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-03 02:48:12,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:48:12,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:48:12,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,023 INFO L356 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2022-11-03 02:48:13,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2022-11-03 02:48:13,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,068 INFO L356 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-03 02:48:13,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-03 02:48:13,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-03 02:48:13,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-03 02:48:13,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-03 02:48:13,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:13,280 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:48:13,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-03 02:48:13,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-03 02:48:13,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-03 02:48:13,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-03 02:48:13,730 INFO L356 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-03 02:48:13,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-03 02:48:15,631 INFO L356 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-11-03 02:48:15,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 134 [2022-11-03 02:48:15,700 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,737 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,866 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,887 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,908 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:15,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:16,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:16,286 INFO L356 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-03 02:48:16,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-03 02:48:18,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:48:18,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:18,593 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:48:18,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 30 case distinctions, treesize of input 175 treesize of output 349