./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V --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 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:14:45,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:14:45,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:14:45,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:14:45,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:14:45,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:14:45,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:14:45,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:14:45,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:14:45,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:14:45,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:14:45,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:14:45,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:14:45,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:14:45,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:14:45,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:14:45,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:14:45,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:14:45,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:14:45,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:14:45,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:14:45,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:14:45,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:14:45,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:14:45,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:14:45,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:14:45,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:14:45,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:14:45,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:14:45,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:14:45,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:14:45,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:14:45,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:14:45,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:14:45,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:14:45,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:14:45,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:14:45,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:14:45,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:14:45,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:14:45,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:14:45,167 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 02:14:45,221 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:14:45,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:14:45,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:14:45,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:14:45,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:14:45,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:14:45,230 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:14:45,230 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:14:45,230 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:14:45,231 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:14:45,232 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:14:45,232 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:14:45,232 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:14:45,233 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:14:45,233 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:14:45,233 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:14:45,233 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:14:45,234 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:14:45,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:14:45,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:14:45,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:14:45,235 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:14:45,236 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:14:45,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:14:45,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:14:45,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:14:45,237 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:14:45,237 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:14:45,237 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:14:45,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:14:45,238 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:14:45,238 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:14:45,238 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:14:45,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:14:45,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:14:45,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:14:45,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:14:45,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:14:45,240 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:14:45,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:14:45,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:14:45,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:14:45,242 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda [2021-11-23 02:14:45,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:14:45,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:14:45,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:14:45,563 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:14:45,563 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:14:45,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-simple/dll2n_append_equal.i [2021-11-23 02:14:45,642 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/data/23c31c711/cda0dab0865f4be1b7e46eb9ce2922af/FLAG91884cfc5 [2021-11-23 02:14:46,227 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:14:46,228 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/sv-benchmarks/c/list-simple/dll2n_append_equal.i [2021-11-23 02:14:46,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/data/23c31c711/cda0dab0865f4be1b7e46eb9ce2922af/FLAG91884cfc5 [2021-11-23 02:14:46,508 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/data/23c31c711/cda0dab0865f4be1b7e46eb9ce2922af [2021-11-23 02:14:46,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:14:46,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:14:46,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:14:46,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:14:46,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:14:46,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:14:46" (1/1) ... [2021-11-23 02:14:46,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eea5bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:46, skipping insertion in model container [2021-11-23 02:14:46,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:14:46" (1/1) ... [2021-11-23 02:14:46,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:14:46,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:14:47,035 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/sv-benchmarks/c/list-simple/dll2n_append_equal.i[24333,24346] [2021-11-23 02:14:47,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:14:47,054 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:14:47,129 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/sv-benchmarks/c/list-simple/dll2n_append_equal.i[24333,24346] [2021-11-23 02:14:47,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:14:47,176 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:14:47,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:47 WrapperNode [2021-11-23 02:14:47,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:14:47,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:14:47,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:14:47,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:14:47,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:47" (1/1) ... [2021-11-23 02:14:47,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:47" (1/1) ... [2021-11-23 02:14:47,242 INFO L137 Inliner]: procedures = 127, calls = 37, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 125 [2021-11-23 02:14:47,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:14:47,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:14:47,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:14:47,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:14:47,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:47" (1/1) ... [2021-11-23 02:14:47,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:47" (1/1) ... [2021-11-23 02:14:47,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:47" (1/1) ... [2021-11-23 02:14:47,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:47" (1/1) ... [2021-11-23 02:14:47,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:47" (1/1) ... [2021-11-23 02:14:47,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:47" (1/1) ... [2021-11-23 02:14:47,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:47" (1/1) ... [2021-11-23 02:14:47,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:14:47,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:14:47,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:14:47,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:14:47,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:47" (1/1) ... [2021-11-23 02:14:47,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:14:47,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:47,353 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:14:47,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:14:47,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:14:47,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:14:47,410 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-23 02:14:47,410 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-23 02:14:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:14:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:14:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:14:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:14:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:14:47,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:14:47,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:14:47,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:14:47,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:14:47,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:14:47,545 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:14:47,548 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:14:48,099 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:14:48,176 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:14:48,177 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 02:14:48,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:14:48 BoogieIcfgContainer [2021-11-23 02:14:48,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:14:48,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:14:48,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:14:48,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:14:48,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:14:46" (1/3) ... [2021-11-23 02:14:48,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6eeff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:14:48, skipping insertion in model container [2021-11-23 02:14:48,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:47" (2/3) ... [2021-11-23 02:14:48,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6eeff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:14:48, skipping insertion in model container [2021-11-23 02:14:48,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:14:48" (3/3) ... [2021-11-23 02:14:48,192 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2021-11-23 02:14:48,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:14:48,199 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-11-23 02:14:48,247 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:14:48,259 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:14:48,259 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-11-23 02:14:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 80 states have internal predecessors, (90), 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) [2021-11-23 02:14:48,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:14:48,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:48,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:14:48,315 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:14:48,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:48,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1862710451, now seen corresponding path program 1 times [2021-11-23 02:14:48,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:48,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333634970] [2021-11-23 02:14:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:48,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:48,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:48,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333634970] [2021-11-23 02:14:48,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333634970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:48,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:48,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:14:48,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925771476] [2021-11-23 02:14:48,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:48,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:48,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:48,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:48,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:48,704 INFO L87 Difference]: Start difference. First operand has 84 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 80 states have internal predecessors, (90), 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, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:48,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:48,810 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2021-11-23 02:14:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 02:14:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:48,828 INFO L225 Difference]: With dead ends: 98 [2021-11-23 02:14:48,829 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 02:14:48,831 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:14:48,836 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 13 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:48,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 157 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:48,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 02:14:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2021-11-23 02:14:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 79 states have internal predecessors, (86), 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) [2021-11-23 02:14:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-11-23 02:14:48,904 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 6 [2021-11-23 02:14:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:48,905 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-11-23 02:14:48,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-11-23 02:14:48,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:14:48,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:48,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:14:48,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:14:48,907 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:14:48,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:48,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1703805257, now seen corresponding path program 1 times [2021-11-23 02:14:48,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:48,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211335049] [2021-11-23 02:14:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:48,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:49,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:49,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211335049] [2021-11-23 02:14:49,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211335049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:49,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:49,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:14:49,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362595065] [2021-11-23 02:14:49,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:49,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:49,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:49,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:49,018 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:49,175 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-11-23 02:14:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:49,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 02:14:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:49,184 INFO L225 Difference]: With dead ends: 80 [2021-11-23 02:14:49,184 INFO L226 Difference]: Without dead ends: 80 [2021-11-23 02:14:49,188 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:14:49,190 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:49,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 108 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-23 02:14:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-23 02:14:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 39 states have (on average 2.128205128205128) internal successors, (83), 76 states have internal predecessors, (83), 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) [2021-11-23 02:14:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-11-23 02:14:49,209 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 6 [2021-11-23 02:14:49,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:49,211 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-11-23 02:14:49,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:49,212 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-11-23 02:14:49,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:14:49,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:49,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:14:49,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:14:49,215 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:14:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:49,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1703805258, now seen corresponding path program 1 times [2021-11-23 02:14:49,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:49,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204171271] [2021-11-23 02:14:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:49,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:49,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:49,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204171271] [2021-11-23 02:14:49,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204171271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:49,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:49,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:14:49,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355341594] [2021-11-23 02:14:49,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:49,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:49,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:49,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:49,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:49,327 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:49,443 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2021-11-23 02:14:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:49,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 02:14:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:49,448 INFO L225 Difference]: With dead ends: 77 [2021-11-23 02:14:49,448 INFO L226 Difference]: Without dead ends: 77 [2021-11-23 02:14:49,449 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:14:49,455 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:49,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 111 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:49,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-23 02:14:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-23 02:14:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 39 states have (on average 2.051282051282051) internal successors, (80), 73 states have internal predecessors, (80), 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) [2021-11-23 02:14:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-11-23 02:14:49,468 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 6 [2021-11-23 02:14:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:49,469 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-11-23 02:14:49,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-11-23 02:14:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:14:49,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:49,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:49,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:14:49,471 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:14:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:49,472 INFO L85 PathProgramCache]: Analyzing trace with hash 468485873, now seen corresponding path program 1 times [2021-11-23 02:14:49,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:49,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335558406] [2021-11-23 02:14:49,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:49,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:49,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:49,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335558406] [2021-11-23 02:14:49,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335558406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:49,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:49,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:14:49,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587213936] [2021-11-23 02:14:49,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:49,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:14:49,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:14:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:14:49,637 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:14:49,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:49,836 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-11-23 02:14:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:14:49,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 02:14:49,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:49,841 INFO L225 Difference]: With dead ends: 76 [2021-11-23 02:14:49,841 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 02:14:49,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:14:49,851 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:49,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 210 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:14:49,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 02:14:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-23 02:14:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 39 states have (on average 2.0) internal successors, (78), 71 states have internal predecessors, (78), 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) [2021-11-23 02:14:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-11-23 02:14:49,866 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 11 [2021-11-23 02:14:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:49,866 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-11-23 02:14:49,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:14:49,867 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-11-23 02:14:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:14:49,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:49,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:49,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:14:49,868 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:14:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:49,868 INFO L85 PathProgramCache]: Analyzing trace with hash 468485872, now seen corresponding path program 1 times [2021-11-23 02:14:49,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:49,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354336592] [2021-11-23 02:14:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:49,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:49,984 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:49,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354336592] [2021-11-23 02:14:49,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354336592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:49,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:49,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:14:49,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951143804] [2021-11-23 02:14:49,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:49,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:14:49,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:49,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:14:49,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:14:50,000 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:14:50,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:50,182 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2021-11-23 02:14:50,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:14:50,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 02:14:50,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:50,185 INFO L225 Difference]: With dead ends: 74 [2021-11-23 02:14:50,185 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 02:14:50,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:14:50,186 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 12 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:50,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 198 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:14:50,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 02:14:50,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-23 02:14:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 69 states have internal predecessors, (76), 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) [2021-11-23 02:14:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2021-11-23 02:14:50,207 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 11 [2021-11-23 02:14:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:50,207 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2021-11-23 02:14:50,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:14:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2021-11-23 02:14:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:14:50,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:50,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:50,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:14:50,209 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:14:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:50,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1981111996, now seen corresponding path program 1 times [2021-11-23 02:14:50,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:50,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904473333] [2021-11-23 02:14:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:50,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:50,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:50,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904473333] [2021-11-23 02:14:50,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904473333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:50,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:50,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:14:50,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680589357] [2021-11-23 02:14:50,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:50,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:50,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:50,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:50,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:50,309 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-23 02:14:50,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:50,344 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2021-11-23 02:14:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:50,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 14 [2021-11-23 02:14:50,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:50,346 INFO L225 Difference]: With dead ends: 79 [2021-11-23 02:14:50,346 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 02:14:50,347 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:14:50,350 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 1 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:50,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 128 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:14:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 02:14:50,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-11-23 02:14:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 73 states have internal predecessors, (80), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:14:50,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-11-23 02:14:50,363 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 14 [2021-11-23 02:14:50,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:50,364 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-11-23 02:14:50,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-23 02:14:50,364 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-11-23 02:14:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:14:50,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:50,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:50,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:14:50,366 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:14:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash -191097445, now seen corresponding path program 1 times [2021-11-23 02:14:50,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:50,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465090946] [2021-11-23 02:14:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:50,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:14:50,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:50,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465090946] [2021-11-23 02:14:50,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465090946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:50,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785187192] [2021-11-23 02:14:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:50,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:50,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:50,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:14:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:50,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:14:50,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:50,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:14:50,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785187192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:50,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [305105929] [2021-11-23 02:14:50,925 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-23 02:14:50,925 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:14:50,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:14:50,940 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:14:50,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:14:51,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,082 INFO L388 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 [2021-11-23 02:14:51,216 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 02:14:51,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 45 [2021-11-23 02:14:51,263 INFO L388 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 [2021-11-23 02:14:51,270 INFO L388 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 [2021-11-23 02:14:51,288 INFO L388 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 13 treesize of output 9 [2021-11-23 02:14:51,297 INFO L388 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 13 treesize of output 9 [2021-11-23 02:14:51,306 INFO L388 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 19 treesize of output 1 [2021-11-23 02:14:51,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,330 INFO L388 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 23 treesize of output 22 [2021-11-23 02:14:51,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,342 INFO L388 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 23 treesize of output 22 [2021-11-23 02:14:51,349 INFO L388 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 19 treesize of output 1 [2021-11-23 02:14:51,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,380 INFO L388 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 34 treesize of output 25 [2021-11-23 02:14:51,399 INFO L388 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 [2021-11-23 02:14:51,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,413 INFO L388 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 34 treesize of output 25 [2021-11-23 02:14:51,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:14:51,588 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 02:14:51,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 45 [2021-11-23 02:14:51,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:14:51,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:51,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 274 [2021-11-23 02:14:51,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:51,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:51,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 257 [2021-11-23 02:14:51,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:51,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:51,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 246 [2021-11-23 02:14:52,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,146 INFO L388 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 265 treesize of output 246 [2021-11-23 02:14:52,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,171 INFO L388 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 249 treesize of output 230 [2021-11-23 02:14:52,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,250 INFO L388 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 27 treesize of output 11 [2021-11-23 02:14:52,497 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:14:52,498 INFO L388 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 299 treesize of output 287 [2021-11-23 02:14:52,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:14:53,005 INFO L388 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 220 treesize of output 212 [2021-11-23 02:14:53,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 194 [2021-11-23 02:14:53,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 173 [2021-11-23 02:14:53,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:14:53,277 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:14:53,278 INFO L388 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 299 treesize of output 287 [2021-11-23 02:14:53,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:14:53,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 202 [2021-11-23 02:14:53,651 INFO L388 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 199 treesize of output 191 [2021-11-23 02:14:53,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 173 [2021-11-23 02:14:53,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:14:53,855 INFO L388 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 [2021-11-23 02:14:53,870 INFO L388 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 [2021-11-23 02:14:53,893 INFO L388 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 [2021-11-23 02:14:53,923 INFO L388 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 [2021-11-23 02:14:53,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,937 INFO L388 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 27 treesize of output 11 [2021-11-23 02:14:53,960 INFO L388 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 [2021-11-23 02:14:54,045 INFO L388 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 5 [2021-11-23 02:14:54,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:14:54,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:14:54,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:14:54,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:14:54,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:14:54,164 INFO L388 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 5 [2021-11-23 02:14:54,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:14:54,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:14:54,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:14:54,262 INFO L388 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 [2021-11-23 02:14:54,270 INFO L388 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 [2021-11-23 02:14:54,289 INFO L388 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 [2021-11-23 02:14:54,318 INFO L388 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 [2021-11-23 02:14:54,327 INFO L388 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 [2021-11-23 02:14:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,338 INFO L388 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 27 treesize of output 11 [2021-11-23 02:14:54,612 INFO L354 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2021-11-23 02:14:54,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 281 [2021-11-23 02:14:54,844 INFO L388 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 [2021-11-23 02:14:54,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:54,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-11-23 02:14:55,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:55,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 177 treesize of output 209 [2021-11-23 02:14:55,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:55,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:55,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 209 treesize of output 205 [2021-11-23 02:14:55,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:55,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:55,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 195 [2021-11-23 02:14:55,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:55,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:55,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 182 [2021-11-23 02:14:55,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:14:56,728 INFO L354 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2021-11-23 02:14:56,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 281 [2021-11-23 02:14:56,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:14:56,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:56,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2021-11-23 02:14:57,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:14:59,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:59,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:59,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 177 treesize of output 173 [2021-11-23 02:14:59,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:59,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 173 treesize of output 205 [2021-11-23 02:14:59,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:59,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:59,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 195 [2021-11-23 02:14:59,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:59,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:59,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 182 [2021-11-23 02:14:59,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:00,501 INFO L354 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2021-11-23 02:15:00,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 281 [2021-11-23 02:15:00,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:00,693 INFO L388 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 118 treesize of output 134 [2021-11-23 02:15:00,896 INFO L354 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2021-11-23 02:15:00,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 337 treesize of output 382 [2021-11-23 02:15:01,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:01,038 INFO L388 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 33 treesize of output 49 [2021-11-23 02:15:01,137 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 20 for LOIs [2021-11-23 02:15:01,158 INFO L388 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 [2021-11-23 02:15:01,165 INFO L388 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 [2021-11-23 02:15:01,197 INFO L388 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 19 treesize of output 1 [2021-11-23 02:15:01,202 INFO L388 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 13 treesize of output 9 [2021-11-23 02:15:01,212 INFO L388 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 13 treesize of output 9 [2021-11-23 02:15:01,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:01,229 INFO L388 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 23 treesize of output 22 [2021-11-23 02:15:01,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:01,237 INFO L388 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 23 treesize of output 22 [2021-11-23 02:15:01,245 INFO L388 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 19 treesize of output 1 [2021-11-23 02:15:01,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:01,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:01,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:01,272 INFO L388 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 34 treesize of output 25 [2021-11-23 02:15:01,283 INFO L388 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 [2021-11-23 02:15:01,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:01,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:01,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:01,294 INFO L388 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 34 treesize of output 25 [2021-11-23 02:15:01,297 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:03,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1208#(and (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= 0 |ULTIMATE.start_dll_append_#in~head#1.base|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= |ULTIMATE.start_dll_append_~data#1| 1) (<= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_dll_append_#in~head#1.offset|) (= |ULTIMATE.start_dll_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_dll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_dll_append_~head#1.base|) 1)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_append_#in~data#1|) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_dll_create_~len#1| 0) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_dll_append_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_append_#in~head#1.offset| 0) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_append_~data#1|) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |ULTIMATE.start_dll_create_~new_head~0#1.offset|) (<= |ULTIMATE.start_dll_create_~new_head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_append_~head#1.base|) (<= |ULTIMATE.start_dll_append_#in~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_create_#res#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-23 02:15:03,980 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:03,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:15:03,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-23 02:15:03,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421322841] [2021-11-23 02:15:03,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:03,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:15:03,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:03,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:15:03,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:15:03,983 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:15:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:04,032 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-11-23 02:15:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:15:04,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2021-11-23 02:15:04,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:04,034 INFO L225 Difference]: With dead ends: 80 [2021-11-23 02:15:04,034 INFO L226 Difference]: Without dead ends: 80 [2021-11-23 02:15:04,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:15:04,035 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 14 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:04,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 132 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:15:04,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-23 02:15:04,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-23 02:15:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 75 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:15:04,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2021-11-23 02:15:04,042 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 24 [2021-11-23 02:15:04,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:04,042 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2021-11-23 02:15:04,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:15:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2021-11-23 02:15:04,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:15:04,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:04,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 02:15:04,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:04,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:04,245 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:15:04,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:04,246 INFO L85 PathProgramCache]: Analyzing trace with hash 730044177, now seen corresponding path program 1 times [2021-11-23 02:15:04,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:04,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581044210] [2021-11-23 02:15:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:04,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:04,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:04,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581044210] [2021-11-23 02:15:04,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581044210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:04,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912676212] [2021-11-23 02:15:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:04,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:04,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:04,428 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:04,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:15:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:04,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:15:04,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:04,532 INFO L388 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 [2021-11-23 02:15:04,655 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:15:04,655 INFO L388 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 [2021-11-23 02:15:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:04,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:04,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912676212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:04,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266371988] [2021-11-23 02:15:04,801 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 02:15:04,801 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:15:04,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:15:04,802 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:15:04,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:15:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:04,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:04,830 INFO L388 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 [2021-11-23 02:15:04,895 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 02:15:04,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 45 [2021-11-23 02:15:04,921 INFO L388 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 [2021-11-23 02:15:04,926 INFO L388 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 [2021-11-23 02:15:04,938 INFO L388 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 19 treesize of output 1 [2021-11-23 02:15:04,946 INFO L388 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 13 treesize of output 9 [2021-11-23 02:15:04,951 INFO L388 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 13 treesize of output 9 [2021-11-23 02:15:04,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:04,964 INFO L388 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 23 treesize of output 22 [2021-11-23 02:15:04,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:04,972 INFO L388 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 23 treesize of output 22 [2021-11-23 02:15:04,978 INFO L388 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 19 treesize of output 1 [2021-11-23 02:15:04,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:04,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:04,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:04,998 INFO L388 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 34 treesize of output 25 [2021-11-23 02:15:05,005 INFO L388 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 [2021-11-23 02:15:05,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,016 INFO L388 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 34 treesize of output 25 [2021-11-23 02:15:05,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:15:05,114 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 02:15:05,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 45 [2021-11-23 02:15:05,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:15:05,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:15:05,231 INFO L388 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 30 treesize of output 21 [2021-11-23 02:15:05,245 INFO L388 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 30 treesize of output 21 [2021-11-23 02:15:05,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:05,287 INFO L388 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 [2021-11-23 02:15:05,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:05,302 INFO L388 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 [2021-11-23 02:15:05,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,320 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:05,389 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:15:05,389 INFO L388 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 31 treesize of output 27 [2021-11-23 02:15:05,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:05,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:05,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:05,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:05,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:05,543 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:15:05,544 INFO L388 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 31 treesize of output 27 [2021-11-23 02:15:05,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:05,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:05,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:05,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:05,718 INFO L388 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 [2021-11-23 02:15:05,726 INFO L388 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 [2021-11-23 02:15:05,737 INFO L388 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 [2021-11-23 02:15:05,759 INFO L388 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 [2021-11-23 02:15:05,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:05,768 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:05,778 INFO L388 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 [2021-11-23 02:15:05,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:05,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:15:05,868 INFO L388 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 5 [2021-11-23 02:15:05,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:05,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:15:05,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:15:05,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:05,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:15:05,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:05,981 INFO L388 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 5 [2021-11-23 02:15:06,038 INFO L388 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 [2021-11-23 02:15:06,045 INFO L388 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 [2021-11-23 02:15:06,054 INFO L388 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 [2021-11-23 02:15:06,073 INFO L388 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 [2021-11-23 02:15:06,080 INFO L388 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 [2021-11-23 02:15:06,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:06,089 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:06,285 INFO L354 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2021-11-23 02:15:06,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 388 [2021-11-23 02:15:06,409 INFO L388 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 [2021-11-23 02:15:06,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:06,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:06,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 02:15:06,549 INFO L388 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 [2021-11-23 02:15:07,025 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 86 for LOIs [2021-11-23 02:15:07,483 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:17,439 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1494#(and (= |ULTIMATE.start_dll_create_~new_head~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_create_~data#1|) (= |ULTIMATE.start_dll_create_~head~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (= (select (select |#memory_int| |ULTIMATE.start_dll_create_~new_head~0#1.base|) |ULTIMATE.start_dll_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_create_~data#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (not (= |ULTIMATE.start_dll_create_~head~0#1.base| 0)) (not (= (select |#valid| |ULTIMATE.start_dll_create_~head~0#1.base|) 1)) (= (select |#valid| |ULTIMATE.start_dll_create_~new_head~0#1.base|) 1) (<= |ULTIMATE.start_dll_create_~len#1| 2) (<= (+ |ULTIMATE.start_dll_create_~new_head~0#1.offset| 8) (select |#length| |ULTIMATE.start_dll_create_~new_head~0#1.base|)) (<= |ULTIMATE.start_dll_create_~data#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) |ULTIMATE.start_dll_create_~head~0#1.offset|))' at error location [2021-11-23 02:15:17,440 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:17,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:15:17,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-11-23 02:15:17,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098070188] [2021-11-23 02:15:17,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:17,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:15:17,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:17,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:15:17,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:15:17,442 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 13 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:15:17,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:17,753 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-11-23 02:15:17,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:15:17,754 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-11-23 02:15:17,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:17,755 INFO L225 Difference]: With dead ends: 89 [2021-11-23 02:15:17,755 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 02:15:17,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:15:17,757 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 4 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:17,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 285 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 280 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2021-11-23 02:15:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 02:15:17,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-11-23 02:15:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 82 states have internal predecessors, (92), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:15:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2021-11-23 02:15:17,763 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 27 [2021-11-23 02:15:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:17,763 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2021-11-23 02:15:17,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:15:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2021-11-23 02:15:17,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:15:17,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:17,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 02:15:17,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:17,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 02:15:17,984 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:15:17,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:17,984 INFO L85 PathProgramCache]: Analyzing trace with hash 730044178, now seen corresponding path program 1 times [2021-11-23 02:15:17,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:17,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507999296] [2021-11-23 02:15:17,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:17,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:18,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:18,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507999296] [2021-11-23 02:15:18,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507999296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:18,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288961244] [2021-11-23 02:15:18,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:18,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:18,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:18,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:18,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:15:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:18,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 02:15:18,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:18,283 INFO L388 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 [2021-11-23 02:15:18,287 INFO L388 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 [2021-11-23 02:15:18,600 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:15:18,601 INFO L388 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 22 treesize of output 24 [2021-11-23 02:15:18,608 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:15:18,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 02:15:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:18,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:18,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288961244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:18,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1809018878] [2021-11-23 02:15:18,821 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 02:15:18,821 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:15:18,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:15:18,822 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:15:18,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:15:18,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:18,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:18,850 INFO L388 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 [2021-11-23 02:15:18,922 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 02:15:18,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 45 [2021-11-23 02:15:18,941 INFO L388 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 [2021-11-23 02:15:18,946 INFO L388 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 [2021-11-23 02:15:18,956 INFO L388 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 19 treesize of output 1 [2021-11-23 02:15:18,962 INFO L388 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 13 treesize of output 9 [2021-11-23 02:15:18,966 INFO L388 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 13 treesize of output 9 [2021-11-23 02:15:18,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:18,978 INFO L388 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 23 treesize of output 22 [2021-11-23 02:15:18,983 INFO L388 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 19 treesize of output 1 [2021-11-23 02:15:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:18,989 INFO L388 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 23 treesize of output 22 [2021-11-23 02:15:19,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,004 INFO L388 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 34 treesize of output 25 [2021-11-23 02:15:19,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,014 INFO L388 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 34 treesize of output 25 [2021-11-23 02:15:19,021 INFO L388 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 [2021-11-23 02:15:19,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:15:19,119 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 02:15:19,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 45 [2021-11-23 02:15:19,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:15:19,213 INFO L388 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 30 treesize of output 21 [2021-11-23 02:15:19,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:15:19,236 INFO L388 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 30 treesize of output 21 [2021-11-23 02:15:19,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:19,267 INFO L388 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 [2021-11-23 02:15:19,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:19,282 INFO L388 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 [2021-11-23 02:15:19,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,295 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:19,358 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:15:19,359 INFO L388 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 31 treesize of output 27 [2021-11-23 02:15:19,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:19,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:19,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:19,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:19,478 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:15:19,479 INFO L388 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 31 treesize of output 27 [2021-11-23 02:15:19,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:19,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:19,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:19,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:19,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:19,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:19,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 301 treesize of output 289 [2021-11-23 02:15:19,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:19,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:19,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 272 [2021-11-23 02:15:19,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:19,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:19,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 261 [2021-11-23 02:15:19,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,781 INFO L388 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 280 treesize of output 261 [2021-11-23 02:15:19,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,791 INFO L388 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 264 treesize of output 245 [2021-11-23 02:15:19,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,824 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:19,899 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:15:19,900 INFO L388 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 31 treesize of output 27 [2021-11-23 02:15:19,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:19,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:19,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 02:15:19,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 02:15:19,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:20,014 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:15:20,014 INFO L388 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 31 treesize of output 27 [2021-11-23 02:15:20,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:20,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:20,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:20,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:20,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 02:15:20,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:20,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 02:15:20,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:20,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 301 treesize of output 289 [2021-11-23 02:15:20,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:20,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:20,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:20,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:20,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:20,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 272 [2021-11-23 02:15:20,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:20,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:20,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:20,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:20,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:20,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 261 [2021-11-23 02:15:20,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:20,346 INFO L388 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 280 treesize of output 261 [2021-11-23 02:15:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:20,358 INFO L388 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 264 treesize of output 245 [2021-11-23 02:15:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:20,402 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:20,680 INFO L354 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2021-11-23 02:15:20,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 411 treesize of output 416 [2021-11-23 02:15:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:20,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-23 02:15:20,823 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 86 for LOIs [2021-11-23 02:15:21,081 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:31,471 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1814#(and (< |#StackHeapBarrier| |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_dll_create_~head~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (= (select (select |#memory_int| |ULTIMATE.start_dll_create_~new_head~0#1.base|) |ULTIMATE.start_dll_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_create_~data#1|) (not (= |ULTIMATE.start_dll_create_~head~0#1.base| 0)) (= |ULTIMATE.start_dll_create_#in~data#1| |ULTIMATE.start_dll_create_~data#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |ULTIMATE.start_dll_create_~new_head~0#1.offset| 8)) 0) (= (select |#valid| |ULTIMATE.start_dll_create_~new_head~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (< |ULTIMATE.start_dll_create_~new_head~0#1.base| |#StackHeapBarrier|) (= (select |#length| |ULTIMATE.start_dll_create_~new_head~0#1.base|) 12) (= |ULTIMATE.start_dll_create_#in~len#1| (+ |ULTIMATE.start_dll_create_~len#1| 1)) (<= 1 |ULTIMATE.start_dll_create_~len#1|) (< |ULTIMATE.start_dll_create_~head~0#1.base| |#StackHeapBarrier|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= (select |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#s~0#1.base|) 0) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (< (select |#length| |ULTIMATE.start_dll_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_create_~head~0#1.offset| 12)) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (not (= |ULTIMATE.start_dll_create_~new_head~0#1.base| 0)) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |ULTIMATE.start_dll_create_~new_head~0#1.offset| 8)) 0) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |ULTIMATE.start_dll_create_~new_head~0#1.offset|) (<= |ULTIMATE.start_dll_create_~new_head~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) |ULTIMATE.start_dll_create_~head~0#1.offset|))' at error location [2021-11-23 02:15:31,471 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:31,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:15:31,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-23 02:15:31,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815853854] [2021-11-23 02:15:31,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:31,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:15:31,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:15:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:15:31,474 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand has 18 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:15:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:31,882 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2021-11-23 02:15:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:15:31,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-11-23 02:15:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:31,884 INFO L225 Difference]: With dead ends: 90 [2021-11-23 02:15:31,884 INFO L226 Difference]: Without dead ends: 90 [2021-11-23 02:15:31,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 02:15:31,886 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 7 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:31,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 379 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 484 Invalid, 0 Unknown, 83 Unchecked, 0.3s Time] [2021-11-23 02:15:31,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-23 02:15:31,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2021-11-23 02:15:31,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.75) internal successors, (91), 82 states have internal predecessors, (91), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:15:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2021-11-23 02:15:31,892 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 27 [2021-11-23 02:15:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:31,892 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2021-11-23 02:15:31,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:15:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2021-11-23 02:15:31,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:15:31,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:31,894 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:31,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:32,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:32,108 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:15:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:32,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1838551256, now seen corresponding path program 2 times [2021-11-23 02:15:32,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:32,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108195543] [2021-11-23 02:15:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:32,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:15:32,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:32,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108195543] [2021-11-23 02:15:32,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108195543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:32,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291673291] [2021-11-23 02:15:32,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:15:32,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:32,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:32,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:32,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:15:32,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:15:32,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:15:32,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:15:32,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:32,420 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:15:32,421 INFO L388 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 16 treesize of output 18 [2021-11-23 02:15:32,542 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:15:32,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-23 02:15:32,581 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 02:15:32,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 02:15:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:32,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:15:32,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291673291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:15:32,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1347695234] [2021-11-23 02:15:32,812 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-23 02:15:32,812 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:15:32,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:15:32,813 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:15:32,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:15:32,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,840 INFO L388 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 [2021-11-23 02:15:32,894 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 02:15:32,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 45 [2021-11-23 02:15:32,905 INFO L388 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 [2021-11-23 02:15:32,909 INFO L388 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 [2021-11-23 02:15:32,918 INFO L388 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 19 treesize of output 1 [2021-11-23 02:15:32,922 INFO L388 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 13 treesize of output 9 [2021-11-23 02:15:32,927 INFO L388 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 13 treesize of output 9 [2021-11-23 02:15:32,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,935 INFO L388 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 23 treesize of output 22 [2021-11-23 02:15:32,941 INFO L388 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 19 treesize of output 1 [2021-11-23 02:15:32,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,947 INFO L388 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 23 treesize of output 22 [2021-11-23 02:15:32,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,961 INFO L388 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 34 treesize of output 25 [2021-11-23 02:15:32,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,970 INFO L388 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 34 treesize of output 25 [2021-11-23 02:15:32,976 INFO L388 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 [2021-11-23 02:15:33,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:15:33,066 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 02:15:33,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 45 [2021-11-23 02:15:33,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:15:33,150 INFO L388 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 30 treesize of output 21 [2021-11-23 02:15:33,162 INFO L388 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 30 treesize of output 21 [2021-11-23 02:15:33,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:15:33,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:33,203 INFO L388 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 [2021-11-23 02:15:33,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:33,216 INFO L388 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 [2021-11-23 02:15:33,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,230 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:33,298 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:15:33,299 INFO L388 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 31 treesize of output 27 [2021-11-23 02:15:33,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:33,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:33,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:33,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:33,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:33,408 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:15:33,409 INFO L388 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 31 treesize of output 27 [2021-11-23 02:15:33,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:33,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:33,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:33,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:33,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:33,558 INFO L388 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 [2021-11-23 02:15:33,564 INFO L388 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 [2021-11-23 02:15:33,573 INFO L388 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 [2021-11-23 02:15:33,587 INFO L388 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 [2021-11-23 02:15:33,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,611 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:33,627 INFO L388 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 [2021-11-23 02:15:33,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:33,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:15:33,719 INFO L388 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 5 [2021-11-23 02:15:33,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:15:33,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:33,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:33,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:15:33,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:33,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:15:33,825 INFO L388 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 5 [2021-11-23 02:15:33,865 INFO L388 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 [2021-11-23 02:15:33,871 INFO L388 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 [2021-11-23 02:15:33,879 INFO L388 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 [2021-11-23 02:15:33,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,896 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:33,903 INFO L388 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 [2021-11-23 02:15:33,909 INFO L388 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 [2021-11-23 02:15:34,095 INFO L354 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2021-11-23 02:15:34,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 281 [2021-11-23 02:15:34,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:34,250 INFO L388 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 25 treesize of output 41 [2021-11-23 02:15:34,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:15:34,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:15:35,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:35,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 177 treesize of output 209 [2021-11-23 02:15:35,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:35,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:35,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 209 treesize of output 205 [2021-11-23 02:15:35,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:35,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:35,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 195 [2021-11-23 02:15:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:35,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:35,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 182 [2021-11-23 02:15:35,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:36,613 INFO L354 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2021-11-23 02:15:36,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 281 [2021-11-23 02:15:36,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-11-23 02:15:36,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:15:36,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:36,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:36,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:36,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-23 02:15:37,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:37,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 177 treesize of output 209 [2021-11-23 02:15:37,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:37,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:37,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 209 treesize of output 205 [2021-11-23 02:15:37,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:37,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:37,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 195 [2021-11-23 02:15:37,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:37,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:37,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 182 [2021-11-23 02:15:37,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:37,859 INFO L354 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2021-11-23 02:15:37,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 281 [2021-11-23 02:15:37,952 INFO L388 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 89 treesize of output 87 [2021-11-23 02:15:38,113 INFO L354 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2021-11-23 02:15:38,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 337 treesize of output 382 [2021-11-23 02:15:38,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:15:38,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:38,286 INFO L388 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 25 treesize of output 41 [2021-11-23 02:15:38,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:15:38,894 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 1 for LOIs [2021-11-23 02:15:38,900 INFO L388 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 [2021-11-23 02:15:38,903 INFO L388 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 [2021-11-23 02:15:38,914 INFO L388 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 19 treesize of output 1 [2021-11-23 02:15:38,917 INFO L388 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 13 treesize of output 9 [2021-11-23 02:15:38,923 INFO L388 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 13 treesize of output 9 [2021-11-23 02:15:38,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:38,932 INFO L388 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 23 treesize of output 22 [2021-11-23 02:15:38,948 INFO L388 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 19 treesize of output 1 [2021-11-23 02:15:38,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:38,953 INFO L388 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 23 treesize of output 22 [2021-11-23 02:15:38,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:38,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:38,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:38,966 INFO L388 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 34 treesize of output 25 [2021-11-23 02:15:38,973 INFO L388 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 [2021-11-23 02:15:38,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:38,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:38,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:38,980 INFO L388 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 34 treesize of output 25 [2021-11-23 02:15:38,984 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:40,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2244#(and (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= 0 |ULTIMATE.start_dll_append_#in~head#1.base|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= |ULTIMATE.start_dll_append_~data#1| 1) (<= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_dll_append_#in~head#1.offset|) (= |ULTIMATE.start_dll_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_dll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_dll_append_~head#1.base|) 1)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_append_#in~data#1|) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_dll_create_~len#1| 0) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_dll_append_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_append_#in~head#1.offset| 0) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_append_~data#1|) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |ULTIMATE.start_dll_create_~new_head~0#1.offset|) (<= |ULTIMATE.start_dll_create_~new_head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_append_~head#1.base|) (<= |ULTIMATE.start_dll_append_#in~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_create_#res#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-23 02:15:40,846 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:40,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:15:40,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2021-11-23 02:15:40,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676287053] [2021-11-23 02:15:40,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:40,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:15:40,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:40,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:15:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:15:40,849 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 02:15:41,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:41,064 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-11-23 02:15:41,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:15:41,065 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2021-11-23 02:15:41,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:41,066 INFO L225 Difference]: With dead ends: 86 [2021-11-23 02:15:41,066 INFO L226 Difference]: Without dead ends: 86 [2021-11-23 02:15:41,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:15:41,068 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:41,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 405 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 188 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2021-11-23 02:15:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-23 02:15:41,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-23 02:15:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.72) internal successors, (86), 80 states have internal predecessors, (86), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:15:41,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-11-23 02:15:41,073 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 37 [2021-11-23 02:15:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:41,073 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-11-23 02:15:41,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 02:15:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-11-23 02:15:41,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 02:15:41,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:41,076 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:41,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:41,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:15:41,291 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:15:41,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:41,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1925046396, now seen corresponding path program 1 times [2021-11-23 02:15:41,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:41,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967527016] [2021-11-23 02:15:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:41,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:15:41,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:41,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967527016] [2021-11-23 02:15:41,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967527016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:41,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537867892] [2021-11-23 02:15:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:41,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:41,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:41,520 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:41,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:15:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:41,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:15:41,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:41,620 INFO L388 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 [2021-11-23 02:15:41,638 INFO L388 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 11 treesize of output 9 [2021-11-23 02:15:41,715 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:15:41,716 INFO L388 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 17 treesize of output 19 [2021-11-23 02:15:41,870 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:15:41,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 27 [2021-11-23 02:15:42,036 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:15:42,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 27 [2021-11-23 02:15:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:15:42,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:48,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537867892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:48,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2061997054] [2021-11-23 02:15:48,481 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-23 02:15:48,481 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:15:48,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:15:48,482 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:15:48,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:15:48,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,512 INFO L388 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 [2021-11-23 02:15:48,582 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 02:15:48,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 45 [2021-11-23 02:15:48,597 INFO L388 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 [2021-11-23 02:15:48,604 INFO L388 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 [2021-11-23 02:15:48,614 INFO L388 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 13 treesize of output 9 [2021-11-23 02:15:48,622 INFO L388 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 13 treesize of output 9 [2021-11-23 02:15:48,628 INFO L388 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 19 treesize of output 1 [2021-11-23 02:15:48,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,640 INFO L388 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 23 treesize of output 22 [2021-11-23 02:15:48,646 INFO L388 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 19 treesize of output 1 [2021-11-23 02:15:48,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,653 INFO L388 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 23 treesize of output 22 [2021-11-23 02:15:48,666 INFO L388 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 [2021-11-23 02:15:48,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,674 INFO L388 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 34 treesize of output 25 [2021-11-23 02:15:48,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,684 INFO L388 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 34 treesize of output 25 [2021-11-23 02:15:48,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:15:48,772 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 02:15:48,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 45 [2021-11-23 02:15:48,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:15:48,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:15:48,876 INFO L388 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 30 treesize of output 21 [2021-11-23 02:15:48,886 INFO L388 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 30 treesize of output 21 [2021-11-23 02:15:48,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:48,913 INFO L388 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 [2021-11-23 02:15:48,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:48,924 INFO L388 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 [2021-11-23 02:15:48,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,935 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:48,996 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:15:48,996 INFO L388 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 31 treesize of output 27 [2021-11-23 02:15:49,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:49,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:49,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:49,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:49,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:49,106 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:15:49,107 INFO L388 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 31 treesize of output 27 [2021-11-23 02:15:49,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:49,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:49,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:49,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:49,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:49,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:49,260 INFO L388 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 0 case distinctions, treesize of input 286 treesize of output 274 [2021-11-23 02:15:49,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,268 INFO L388 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 274 treesize of output 257 [2021-11-23 02:15:49,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,280 INFO L388 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 259 treesize of output 242 [2021-11-23 02:15:49,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,342 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:49,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:49,353 INFO L388 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 257 treesize of output 244 [2021-11-23 02:15:49,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:49,365 INFO L388 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 245 treesize of output 232 [2021-11-23 02:15:49,447 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:15:49,447 INFO L388 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 31 treesize of output 27 [2021-11-23 02:15:49,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:49,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:49,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:49,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:49,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:49,533 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:15:49,534 INFO L388 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 31 treesize of output 27 [2021-11-23 02:15:49,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:49,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:49,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 02:15:49,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:49,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:15:49,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:49,693 INFO L388 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 0 case distinctions, treesize of input 286 treesize of output 274 [2021-11-23 02:15:49,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,701 INFO L388 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 274 treesize of output 257 [2021-11-23 02:15:49,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,711 INFO L388 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 259 treesize of output 242 [2021-11-23 02:15:49,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,770 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:49,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:49,780 INFO L388 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 257 treesize of output 244 [2021-11-23 02:15:49,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:49,790 INFO L388 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 245 treesize of output 232 [2021-11-23 02:15:49,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,874 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:49,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:49,895 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:15:49,896 INFO L388 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 1 case distinctions, treesize of input 247 treesize of output 245 [2021-11-23 02:15:49,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:49,919 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 02:15:49,920 INFO L388 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 1 case distinctions, treesize of input 243 treesize of output 245 [2021-11-23 02:15:50,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:50,036 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:50,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:50,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:50,063 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 02:15:50,063 INFO L388 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 1 case distinctions, treesize of input 247 treesize of output 249 [2021-11-23 02:15:50,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:50,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:50,084 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:15:50,085 INFO L388 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 1 case distinctions, treesize of input 246 treesize of output 244 [2021-11-23 02:15:50,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:50,243 INFO L388 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 0 case distinctions, treesize of input 286 treesize of output 274 [2021-11-23 02:15:50,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:50,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:50,251 INFO L388 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 274 treesize of output 257 [2021-11-23 02:15:50,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:50,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:50,260 INFO L388 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 259 treesize of output 242 [2021-11-23 02:15:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:50,321 INFO L388 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 27 treesize of output 11 [2021-11-23 02:15:50,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:50,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:50,331 INFO L388 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 257 treesize of output 244 [2021-11-23 02:15:50,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:50,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:50,354 INFO L388 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 245 treesize of output 232 [2021-11-23 02:15:50,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:50,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:50,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:50,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:15:50,870 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2021-11-23 02:15:51,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:51,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:51,291 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 02:15:51,296 INFO L158 Benchmark]: Toolchain (without parser) took 64782.77ms. Allocated memory was 109.1MB in the beginning and 243.3MB in the end (delta: 134.2MB). Free memory was 64.3MB in the beginning and 172.9MB in the end (delta: -108.5MB). Peak memory consumption was 25.1MB. Max. memory is 16.1GB. [2021-11-23 02:15:51,296 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 109.1MB. Free memory is still 82.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:15:51,296 INFO L158 Benchmark]: CACSL2BoogieTranslator took 662.41ms. Allocated memory is still 109.1MB. Free memory was 64.2MB in the beginning and 75.8MB in the end (delta: -11.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 02:15:51,297 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.98ms. Allocated memory is still 109.1MB. Free memory was 75.8MB in the beginning and 73.3MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 02:15:51,297 INFO L158 Benchmark]: Boogie Preprocessor took 51.72ms. Allocated memory is still 109.1MB. Free memory was 73.3MB in the beginning and 71.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:15:51,297 INFO L158 Benchmark]: RCFGBuilder took 885.95ms. Allocated memory is still 109.1MB. Free memory was 71.8MB in the beginning and 51.6MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-23 02:15:51,298 INFO L158 Benchmark]: TraceAbstraction took 63110.97ms. Allocated memory was 109.1MB in the beginning and 243.3MB in the end (delta: 134.2MB). Free memory was 51.3MB in the beginning and 172.9MB in the end (delta: -121.6MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2021-11-23 02:15:51,301 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 109.1MB. Free memory is still 82.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 662.41ms. Allocated memory is still 109.1MB. Free memory was 64.2MB in the beginning and 75.8MB in the end (delta: -11.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.98ms. Allocated memory is still 109.1MB. Free memory was 75.8MB in the beginning and 73.3MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.72ms. Allocated memory is still 109.1MB. Free memory was 73.3MB in the beginning and 71.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 885.95ms. Allocated memory is still 109.1MB. Free memory was 71.8MB in the beginning and 51.6MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 63110.97ms. Allocated memory was 109.1MB in the beginning and 243.3MB in the end (delta: 134.2MB). Free memory was 51.3MB in the beginning and 172.9MB in the end (delta: -121.6MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 02:15:51,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V --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 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:15:53,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:15:53,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:15:53,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:15:53,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:15:53,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:15:53,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:15:53,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:15:53,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:15:53,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:15:53,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:15:53,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:15:53,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:15:53,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:15:53,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:15:53,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:15:53,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:15:53,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:15:53,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:15:54,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:15:54,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:15:54,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:15:54,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:15:54,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:15:54,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:15:54,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:15:54,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:15:54,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:15:54,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:15:54,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:15:54,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:15:54,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:15:54,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:15:54,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:15:54,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:15:54,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:15:54,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:15:54,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:15:54,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:15:54,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:15:54,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:15:54,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 02:15:54,061 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:15:54,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:15:54,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:15:54,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:15:54,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:15:54,063 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:15:54,063 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:15:54,064 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:15:54,064 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:15:54,064 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:15:54,064 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:15:54,065 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:15:54,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:15:54,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:15:54,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:15:54,066 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:15:54,067 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:15:54,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:15:54,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:15:54,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:15:54,068 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:15:54,068 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:15:54,068 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:15:54,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:15:54,069 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:15:54,069 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:15:54,069 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:15:54,069 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:15:54,070 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:15:54,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:15:54,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:15:54,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:15:54,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:15:54,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:15:54,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:15:54,072 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:15:54,072 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:15:54,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:15:54,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:15:54,073 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda [2021-11-23 02:15:54,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:15:54,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:15:54,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:15:54,528 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:15:54,529 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:15:54,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-simple/dll2n_append_equal.i [2021-11-23 02:15:54,615 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/data/9f3c76e92/e6864680f01b47d2967ba0d3f441b346/FLAG007352ad1 [2021-11-23 02:15:55,231 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:15:55,232 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/sv-benchmarks/c/list-simple/dll2n_append_equal.i [2021-11-23 02:15:55,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/data/9f3c76e92/e6864680f01b47d2967ba0d3f441b346/FLAG007352ad1 [2021-11-23 02:15:55,562 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/data/9f3c76e92/e6864680f01b47d2967ba0d3f441b346 [2021-11-23 02:15:55,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:15:55,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:15:55,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:15:55,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:15:55,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:15:55,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:15:55" (1/1) ... [2021-11-23 02:15:55,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77cfda98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:55, skipping insertion in model container [2021-11-23 02:15:55,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:15:55" (1/1) ... [2021-11-23 02:15:55,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:15:55,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:15:56,136 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/sv-benchmarks/c/list-simple/dll2n_append_equal.i[24333,24346] [2021-11-23 02:15:56,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:15:56,165 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:15:56,251 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/sv-benchmarks/c/list-simple/dll2n_append_equal.i[24333,24346] [2021-11-23 02:15:56,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:15:56,310 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:15:56,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:56 WrapperNode [2021-11-23 02:15:56,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:15:56,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:15:56,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:15:56,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:15:56,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:56" (1/1) ... [2021-11-23 02:15:56,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:56" (1/1) ... [2021-11-23 02:15:56,407 INFO L137 Inliner]: procedures = 130, calls = 37, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 126 [2021-11-23 02:15:56,408 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:15:56,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:15:56,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:15:56,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:15:56,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:56" (1/1) ... [2021-11-23 02:15:56,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:56" (1/1) ... [2021-11-23 02:15:56,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:56" (1/1) ... [2021-11-23 02:15:56,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:56" (1/1) ... [2021-11-23 02:15:56,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:56" (1/1) ... [2021-11-23 02:15:56,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:56" (1/1) ... [2021-11-23 02:15:56,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:56" (1/1) ... [2021-11-23 02:15:56,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:15:56,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:15:56,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:15:56,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:15:56,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:56" (1/1) ... [2021-11-23 02:15:56,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:15:56,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:56,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:15:56,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:15:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 02:15:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-23 02:15:56,601 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-23 02:15:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:15:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:15:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:15:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:15:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:15:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:15:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 02:15:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:15:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:15:56,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:15:56,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:15:56,776 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:15:56,778 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:15:57,327 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:15:57,334 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:15:57,334 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 02:15:57,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:15:57 BoogieIcfgContainer [2021-11-23 02:15:57,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:15:57,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:15:57,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:15:57,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:15:57,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:15:55" (1/3) ... [2021-11-23 02:15:57,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d37418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:15:57, skipping insertion in model container [2021-11-23 02:15:57,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:56" (2/3) ... [2021-11-23 02:15:57,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d37418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:15:57, skipping insertion in model container [2021-11-23 02:15:57,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:15:57" (3/3) ... [2021-11-23 02:15:57,346 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2021-11-23 02:15:57,352 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:15:57,353 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-11-23 02:15:57,399 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:15:57,407 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:15:57,407 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-11-23 02:15:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 93 states have internal predecessors, (106), 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) [2021-11-23 02:15:57,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:15:57,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:57,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:57,434 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:15:57,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:57,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1815348631, now seen corresponding path program 1 times [2021-11-23 02:15:57,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:15:57,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881619314] [2021-11-23 02:15:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:57,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:15:57,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:15:57,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:15:57,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:15:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:57,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:15:57,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:57,660 INFO L388 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 [2021-11-23 02:15:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:57,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:57,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:15:57,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881619314] [2021-11-23 02:15:57,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881619314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:15:57,709 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:15:57,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:15:57,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179432211] [2021-11-23 02:15:57,712 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:15:57,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:15:57,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:15:57,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:15:57,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:15:57,750 INFO L87 Difference]: Start difference. First operand has 97 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 93 states have internal predecessors, (106), 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 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:57,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:57,980 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2021-11-23 02:15:57,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:15:57,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:15:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:57,992 INFO L225 Difference]: With dead ends: 94 [2021-11-23 02:15:57,992 INFO L226 Difference]: Without dead ends: 91 [2021-11-23 02:15:57,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:15:57,999 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 10 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:58,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:15:58,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-23 02:15:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-23 02:15:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.88) internal successors, (94), 87 states have internal predecessors, (94), 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) [2021-11-23 02:15:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2021-11-23 02:15:58,050 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 7 [2021-11-23 02:15:58,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:58,051 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2021-11-23 02:15:58,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:58,051 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2021-11-23 02:15:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:15:58,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:58,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:58,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:58,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:15:58,267 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:15:58,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:58,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1815348632, now seen corresponding path program 1 times [2021-11-23 02:15:58,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:15:58,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128004715] [2021-11-23 02:15:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:58,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:15:58,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:15:58,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:15:58,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:15:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:58,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:15:58,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:58,411 INFO L388 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 [2021-11-23 02:15:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:58,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:58,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:15:58,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128004715] [2021-11-23 02:15:58,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128004715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:15:58,560 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:15:58,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-23 02:15:58,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61430439] [2021-11-23 02:15:58,561 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:15:58,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:15:58,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:15:58,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:15:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:15:58,566 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2021-11-23 02:15:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:58,998 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-11-23 02:15:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:15:59,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 7 [2021-11-23 02:15:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:59,002 INFO L225 Difference]: With dead ends: 88 [2021-11-23 02:15:59,002 INFO L226 Difference]: Without dead ends: 88 [2021-11-23 02:15:59,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:15:59,004 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:59,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:15:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-23 02:15:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-23 02:15:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 50 states have (on average 1.82) internal successors, (91), 84 states have internal predecessors, (91), 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) [2021-11-23 02:15:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2021-11-23 02:15:59,018 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 7 [2021-11-23 02:15:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:59,019 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2021-11-23 02:15:59,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2021-11-23 02:15:59,019 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2021-11-23 02:15:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:15:59,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:59,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:59,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:59,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:15:59,233 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:15:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:59,234 INFO L85 PathProgramCache]: Analyzing trace with hash 927333361, now seen corresponding path program 1 times [2021-11-23 02:15:59,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:15:59,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659240693] [2021-11-23 02:15:59,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:59,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:15:59,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:15:59,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:15:59,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:15:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:59,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:15:59,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:59,378 INFO L388 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 [2021-11-23 02:15:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:59,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:00,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:16:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659240693] [2021-11-23 02:16:00,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659240693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:00,041 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:00,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-23 02:16:00,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297632481] [2021-11-23 02:16:00,041 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:00,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:16:00,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:16:00,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:16:00,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:16:00,043 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:16:01,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:01,236 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2021-11-23 02:16:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:16:01,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-23 02:16:01,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:01,240 INFO L225 Difference]: With dead ends: 91 [2021-11-23 02:16:01,240 INFO L226 Difference]: Without dead ends: 91 [2021-11-23 02:16:01,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:16:01,242 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 32 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:01,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 299 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 02:16:01,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-23 02:16:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-11-23 02:16:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.78) internal successors, (89), 82 states have internal predecessors, (89), 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) [2021-11-23 02:16:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2021-11-23 02:16:01,267 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 14 [2021-11-23 02:16:01,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:01,267 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2021-11-23 02:16:01,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:16:01,268 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2021-11-23 02:16:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:16:01,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:01,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:01,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:01,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:16:01,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:16:01,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:01,482 INFO L85 PathProgramCache]: Analyzing trace with hash 927333360, now seen corresponding path program 1 times [2021-11-23 02:16:01,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:16:01,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134474681] [2021-11-23 02:16:01,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:01,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:16:01,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:16:01,485 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:16:01,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:16:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:01,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:16:01,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:01,611 INFO L388 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 [2021-11-23 02:16:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:01,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:01,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:16:01,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134474681] [2021-11-23 02:16:01,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134474681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:01,779 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:01,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 02:16:01,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303635283] [2021-11-23 02:16:01,780 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:01,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:16:01,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:16:01,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:16:01,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:16:01,782 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-23 02:16:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:02,253 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-11-23 02:16:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:16:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 14 [2021-11-23 02:16:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:02,255 INFO L225 Difference]: With dead ends: 89 [2021-11-23 02:16:02,255 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 02:16:02,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:16:02,257 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 14 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:02,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 283 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:16:02,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 02:16:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2021-11-23 02:16:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.74) internal successors, (87), 80 states have internal predecessors, (87), 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) [2021-11-23 02:16:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2021-11-23 02:16:02,266 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 14 [2021-11-23 02:16:02,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:02,271 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2021-11-23 02:16:02,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-23 02:16:02,272 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2021-11-23 02:16:02,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:16:02,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:02,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:02,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:02,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:16:02,482 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:16:02,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:02,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1763306156, now seen corresponding path program 1 times [2021-11-23 02:16:02,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:16:02,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808824555] [2021-11-23 02:16:02,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:02,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:16:02,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:16:02,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:16:02,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:16:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:02,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:16:02,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:02,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:02,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:16:02,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808824555] [2021-11-23 02:16:02,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808824555] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:02,664 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:02,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 02:16:02,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118990427] [2021-11-23 02:16:02,665 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:02,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:16:02,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:16:02,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:16:02,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:16:02,666 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-11-23 02:16:02,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:02,706 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2021-11-23 02:16:02,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:16:02,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 16 [2021-11-23 02:16:02,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:02,708 INFO L225 Difference]: With dead ends: 95 [2021-11-23 02:16:02,708 INFO L226 Difference]: Without dead ends: 95 [2021-11-23 02:16:02,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:16:02,710 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 18 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:02,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 254 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:16:02,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-23 02:16:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-11-23 02:16:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 88 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:16:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2021-11-23 02:16:02,720 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 16 [2021-11-23 02:16:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:02,720 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-11-23 02:16:02,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-11-23 02:16:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2021-11-23 02:16:02,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:16:02,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:02,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:02,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:02,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:16:02,922 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:16:02,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:02,923 INFO L85 PathProgramCache]: Analyzing trace with hash 958467140, now seen corresponding path program 1 times [2021-11-23 02:16:02,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:16:02,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219781781] [2021-11-23 02:16:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:02,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:16:02,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:16:02,926 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:16:02,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:16:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:03,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:16:03,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:03,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:03,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:16:03,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219781781] [2021-11-23 02:16:03,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219781781] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:03,180 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:03,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:16:03,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886443599] [2021-11-23 02:16:03,181 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:03,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:03,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:16:03,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:03,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:03,182 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:16:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:03,229 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2021-11-23 02:16:03,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:16:03,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-23 02:16:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:03,233 INFO L225 Difference]: With dead ends: 93 [2021-11-23 02:16:03,233 INFO L226 Difference]: Without dead ends: 93 [2021-11-23 02:16:03,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:03,234 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:03,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 172 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:16:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-23 02:16:03,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-11-23 02:16:03,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 87 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:16:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-11-23 02:16:03,243 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 17 [2021-11-23 02:16:03,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:03,243 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-11-23 02:16:03,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:16:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-11-23 02:16:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:16:03,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:03,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:03,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:03,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:16:03,459 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:16:03,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:03,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1367704317, now seen corresponding path program 1 times [2021-11-23 02:16:03,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:16:03,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565170527] [2021-11-23 02:16:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:03,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:16:03,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:16:03,461 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:16:03,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 02:16:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:03,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:16:03,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:03,670 INFO L388 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 [2021-11-23 02:16:03,932 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 02:16:03,932 INFO L388 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 18 treesize of output 23 [2021-11-23 02:16:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:03,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:04,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:16:04,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565170527] [2021-11-23 02:16:04,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565170527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:04,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1386771052] [2021-11-23 02:16:04,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:04,412 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:16:04,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:16:04,414 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:16:04,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 02:16:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:04,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:16:04,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:04,697 INFO L388 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 [2021-11-23 02:16:04,860 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 02:16:04,861 INFO L388 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 19 treesize of output 24 [2021-11-23 02:16:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:04,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:05,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1386771052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:05,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613247582] [2021-11-23 02:16:05,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:05,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:05,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:05,361 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:05,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:16:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:05,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:16:05,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:05,634 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:16:05,634 INFO L388 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 23 treesize of output 30 [2021-11-23 02:16:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:05,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:57,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613247582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:57,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:16:57,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 10, 7, 9, 9] total 21 [2021-11-23 02:16:57,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045049409] [2021-11-23 02:16:57,384 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:57,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 02:16:57,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:16:57,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 02:16:57,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=367, Unknown=22, NotChecked=0, Total=462 [2021-11-23 02:16:57,387 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 22 states, 21 states have (on average 3.619047619047619) internal successors, (76), 17 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:16:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:58,098 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2021-11-23 02:16:58,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:16:58,099 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.619047619047619) internal successors, (76), 17 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 32 [2021-11-23 02:16:58,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:58,100 INFO L225 Difference]: With dead ends: 103 [2021-11-23 02:16:58,100 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 02:16:58,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 16 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=115, Invalid=565, Unknown=22, NotChecked=0, Total=702 [2021-11-23 02:16:58,102 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 8 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:58,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 698 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 0 Unknown, 352 Unchecked, 0.4s Time] [2021-11-23 02:16:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 02:16:58,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-11-23 02:16:58,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 64 states have (on average 1.625) internal successors, (104), 94 states have internal predecessors, (104), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:16:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2021-11-23 02:16:58,111 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 32 [2021-11-23 02:16:58,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:58,112 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2021-11-23 02:16:58,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.619047619047619) internal successors, (76), 17 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:16:58,113 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2021-11-23 02:16:58,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:16:58,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:58,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:58,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:58,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:58,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:58,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:58,720 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:16:58,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:58,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1367704316, now seen corresponding path program 1 times [2021-11-23 02:16:58,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:16:58,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833062451] [2021-11-23 02:16:58,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:58,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:16:58,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:16:58,723 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:16:58,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 02:16:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:58,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:16:58,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:58,912 INFO L388 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 [2021-11-23 02:16:58,918 INFO L388 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 [2021-11-23 02:16:59,445 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:16:59,445 INFO L388 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 31 treesize of output 33 [2021-11-23 02:16:59,461 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:16:59,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-23 02:16:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:59,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:04,706 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ BitVec 32))) (or (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ bv12 32)))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10|)) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4|) .cse0))) (exists ((|v_node_create_~temp~0#1.base_55| (_ BitVec 32))) (and (let ((.cse1 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ bv12 32)))) (or (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4|) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_55| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_55|))))))) is different from true [2021-11-23 02:17:09,888 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_56| (_ BitVec 32)) (|v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ BitVec 32))) (or (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ bv12 32)))) (and (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_56| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10|)) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4|) .cse0))) (exists ((|v_node_create_~temp~0#1.base_55| (_ BitVec 32))) (and (let ((.cse1 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ bv12 32)))) (or (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4|) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_55| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_55|))))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_56|))))) is different from false [2021-11-23 02:17:11,904 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_56| (_ BitVec 32)) (|v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ BitVec 32))) (or (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ bv12 32)))) (and (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_56| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10|)) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4|) .cse0))) (exists ((|v_node_create_~temp~0#1.base_55| (_ BitVec 32))) (and (let ((.cse1 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ bv12 32)))) (or (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4|) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_55| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_55|))))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_56|))))) is different from true [2021-11-23 02:17:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-23 02:17:14,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:17:14,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833062451] [2021-11-23 02:17:14,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833062451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:14,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1460684869] [2021-11-23 02:17:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:14,174 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:17:14,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:17:14,180 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:17:14,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 02:17:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:14,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:17:14,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:14,487 INFO L388 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 [2021-11-23 02:17:14,495 INFO L388 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 [2021-11-23 02:17:14,916 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:17:14,917 INFO L388 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 28 treesize of output 30 [2021-11-23 02:17:14,938 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:17:14,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 02:17:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:17:15,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:17,347 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_63| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv12 32) |c_ULTIMATE.start_dll_create_~head~0#1.offset|))) (and (bvule (bvadd (_ bv8 32) |c_ULTIMATE.start_dll_create_~head~0#1.offset|) .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_63| (_ bv12 32)) |c_ULTIMATE.start_dll_create_~head~0#1.base|)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_63|))))))) is different from false [2021-11-23 02:17:29,179 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_64| (_ BitVec 32)) (|v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_63| (_ BitVec 32))) (and (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_6| (_ bv12 32)))) (or (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_6|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_63| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_12|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_63|))))))) (let ((.cse1 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_6| (_ bv12 32)))) (and (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_6|) .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_64| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_12|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_64|)))))) is different from false [2021-11-23 02:17:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:17:30,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1460684869] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:30,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996082378] [2021-11-23 02:17:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:30,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:30,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:30,199 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:30,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:17:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:30,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:17:30,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:30,313 INFO L388 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 [2021-11-23 02:17:30,796 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:17:30,796 INFO L388 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 30 treesize of output 32 [2021-11-23 02:17:30,819 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:17:30,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-11-23 02:17:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:17:30,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:46,948 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_8| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_72| (_ BitVec 32)) (|v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_14| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_72|))))) (exists ((|v_node_create_~temp~0#1.base_55| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_55|)))) (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_8| (_ bv12 32)))) (or (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_8|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_55| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_14|))))))) (let ((.cse1 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_8| (_ bv12 32)))) (and (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_8|) .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_72| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_14|)))))) is different from false [2021-11-23 02:17:47,687 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:17:47,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-23 02:17:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:17:50,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996082378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:50,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:17:50,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 24 [2021-11-23 02:17:50,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060902145] [2021-11-23 02:17:50,144 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:17:50,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:17:50,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:17:50,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:17:50,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=324, Unknown=15, NotChecked=200, Total=600 [2021-11-23 02:17:50,147 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 25 states, 24 states have (on average 3.125) internal successors, (75), 19 states have internal predecessors, (75), 4 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 02:17:56,499 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (forall ((|v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_8| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_72| (_ BitVec 32)) (|v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_14| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_72|))))) (exists ((|v_node_create_~temp~0#1.base_55| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_55|)))) (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_8| (_ bv12 32)))) (or (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_8|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_55| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_14|))))))) (let ((.cse1 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_8| (_ bv12 32)))) (and (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_8|) .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_72| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_14|)))))) (= |c_#length| |c_old(#length)|) (forall ((|v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_64| (_ BitVec 32)) (|v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_63| (_ BitVec 32))) (and (let ((.cse2 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_6| (_ bv12 32)))) (or (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_6|) .cse2)) (not (bvule .cse2 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_63| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_12|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_63|))))))) (let ((.cse3 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_6| (_ bv12 32)))) (and (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_6|) .cse3) (bvule .cse3 (select (store |c_#length| |v_node_create_~temp~0#1.base_64| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_12|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_64|)))))) (forall ((|v_node_create_~temp~0#1.base_56| (_ BitVec 32)) (|v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ BitVec 32))) (or (let ((.cse4 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ bv12 32)))) (and (bvule .cse4 (select (store |c_#length| |v_node_create_~temp~0#1.base_56| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10|)) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4|) .cse4))) (exists ((|v_node_create_~temp~0#1.base_55| (_ BitVec 32))) (and (let ((.cse5 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ bv12 32)))) (or (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4|) .cse5)) (not (bvule .cse5 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_55| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_55|))))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_56|)))))) is different from false [2021-11-23 02:18:10,865 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))))) (forall ((|v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ BitVec 32))) (or (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ bv12 32)))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10|)) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4|) .cse0))) (exists ((|v_node_create_~temp~0#1.base_55| (_ BitVec 32))) (and (let ((.cse1 (bvadd |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4| (_ bv12 32)))) (or (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_create_~head~0#1.offset_BEFORE_CALL_4|) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_55| (_ bv12 32)) |v_ULTIMATE.start_dll_create_~head~0#1.base_BEFORE_CALL_10|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_55|))))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |c_node_create_#res#1.base|)) (_ bv1 1))) (= (select |c_#length| |c_node_create_#res#1.base|) (_ bv12 32)) (= |c_node_create_#res#1.offset| (_ bv0 32))) is different from false [2021-11-23 02:18:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:11,563 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2021-11-23 02:18:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:18:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.125) internal successors, (75), 19 states have internal predecessors, (75), 4 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2021-11-23 02:18:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:11,566 INFO L225 Difference]: With dead ends: 111 [2021-11-23 02:18:11,566 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 02:18:11,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 7 IntricatePredicates, 1 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 57.0s TimeCoverageRelationStatistics Valid=113, Invalid=543, Unknown=22, NotChecked=378, Total=1056 [2021-11-23 02:18:11,568 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 17 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 797 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:11,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 649 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 797 Unchecked, 0.6s Time] [2021-11-23 02:18:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 02:18:11,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2021-11-23 02:18:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.5492957746478873) internal successors, (110), 101 states have internal predecessors, (110), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:18:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-11-23 02:18:11,577 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 32 [2021-11-23 02:18:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:11,578 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-11-23 02:18:11,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.125) internal successors, (75), 19 states have internal predecessors, (75), 4 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 02:18:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-11-23 02:18:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:18:11,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:11,581 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:11,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:11,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:12,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:12,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:18:12,208 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:18:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1122646220, now seen corresponding path program 1 times [2021-11-23 02:18:12,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:18:12,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132201019] [2021-11-23 02:18:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:12,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:18:12,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:18:12,210 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:18:12,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 02:18:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:12,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:18:12,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:18:12,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:18:12,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:18:12,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132201019] [2021-11-23 02:18:12,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132201019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:12,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2102929837] [2021-11-23 02:18:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:12,743 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:18:12,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:18:12,744 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:18:12,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 02:18:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:12,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:18:12,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:18:13,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:18:13,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2102929837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:13,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922665671] [2021-11-23 02:18:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:13,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:13,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:13,170 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:13,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 02:18:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:13,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:18:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:18:13,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:18:13,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922665671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:13,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:18:13,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 7 [2021-11-23 02:18:13,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477751066] [2021-11-23 02:18:13,551 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:13,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:18:13,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:18:13,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:18:13,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:18:13,552 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:18:13,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:13,951 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2021-11-23 02:18:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:18:13,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2021-11-23 02:18:13,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:13,954 INFO L225 Difference]: With dead ends: 106 [2021-11-23 02:18:13,954 INFO L226 Difference]: Without dead ends: 106 [2021-11-23 02:18:13,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:18:13,955 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 148 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:13,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 330 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:18:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-23 02:18:13,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-11-23 02:18:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.5217391304347827) internal successors, (105), 99 states have internal predecessors, (105), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:18:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2021-11-23 02:18:13,962 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 46 [2021-11-23 02:18:13,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:13,963 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2021-11-23 02:18:13,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:18:13,964 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2021-11-23 02:18:13,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:18:13,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:13,966 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:13,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:14,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:14,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:14,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:18:14,585 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:18:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash 186649324, now seen corresponding path program 1 times [2021-11-23 02:18:14,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:18:14,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257158026] [2021-11-23 02:18:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:14,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:18:14,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:18:14,587 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:18:14,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 02:18:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:14,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:18:14,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:14,816 INFO L388 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 [2021-11-23 02:18:14,858 INFO L388 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 13 treesize of output 11 [2021-11-23 02:18:15,058 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:18:15,058 INFO L388 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 23 treesize of output 30 [2021-11-23 02:18:15,350 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:18:15,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-11-23 02:18:15,624 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-23 02:18:15,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 59 [2021-11-23 02:18:16,626 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-23 02:18:16,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 58 [2021-11-23 02:18:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:18:18,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 7 refuted. 15 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:55,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:18:55,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257158026] [2021-11-23 02:18:55,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257158026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:55,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1026973516] [2021-11-23 02:18:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:55,583 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:18:55,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:18:55,584 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:18:55,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 02:18:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:55,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:18:55,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:56,146 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 02:18:56,146 INFO L388 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 14 treesize of output 19 [2021-11-23 02:18:56,471 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:18:56,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 02:18:56,716 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-23 02:18:56,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 37 [2021-11-23 02:18:57,447 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:18:57,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 40 [2021-11-23 02:18:59,880 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-11-23 02:18:59,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 75 [2021-11-23 02:19:00,927 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:19:00,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 48 [2021-11-23 02:19:01,271 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-11-23 02:19:01,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2021-11-23 02:19:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:19:01,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:19:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:19:09,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1026973516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:09,540 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:19:09,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [11, 10] total 27 [2021-11-23 02:19:09,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398494479] [2021-11-23 02:19:09,540 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:09,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:19:09,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:19:09,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:19:09,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=614, Unknown=14, NotChecked=0, Total=756 [2021-11-23 02:19:09,542 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand has 15 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 02:19:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:16,320 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2021-11-23 02:19:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:19:16,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 47 [2021-11-23 02:19:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:16,322 INFO L225 Difference]: With dead ends: 109 [2021-11-23 02:19:16,322 INFO L226 Difference]: Without dead ends: 109 [2021-11-23 02:19:16,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 142 SyntacticMatches, 16 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=157, Invalid=756, Unknown=17, NotChecked=0, Total=930 [2021-11-23 02:19:16,324 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 12 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:16,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 409 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 129 Invalid, 0 Unknown, 150 Unchecked, 0.5s Time] [2021-11-23 02:19:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-23 02:19:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-11-23 02:19:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 69 states have (on average 1.5072463768115942) internal successors, (104), 98 states have internal predecessors, (104), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:19:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2021-11-23 02:19:16,332 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 47 [2021-11-23 02:19:16,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:16,332 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2021-11-23 02:19:16,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 02:19:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2021-11-23 02:19:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:19:16,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:16,335 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:16,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:19:16,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:19:16,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:19:16,740 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:19:16,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:16,740 INFO L85 PathProgramCache]: Analyzing trace with hash 186649325, now seen corresponding path program 1 times [2021-11-23 02:19:16,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:19:16,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535587042] [2021-11-23 02:19:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:16,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:19:16,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:19:16,742 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:19:16,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 02:19:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:16,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:19:16,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:19:16,967 INFO L388 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 [2021-11-23 02:19:17,000 INFO L388 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 [2021-11-23 02:19:17,098 INFO L388 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 17 treesize of output 15 [2021-11-23 02:19:17,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-23 02:19:17,414 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:19:17,415 INFO L388 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 25 treesize of output 27 [2021-11-23 02:19:17,425 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:19:17,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 02:19:17,709 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:19:17,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-11-23 02:19:18,087 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:19:18,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2021-11-23 02:19:19,333 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-23 02:19:19,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 32 [2021-11-23 02:19:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:19:19,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:19:22,343 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_2|))) (or (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_6|)) (not (bvule |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_2| .cse0)) (exists ((|v_node_create_~temp~0#1.base_138| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_2|) (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_138| (_ bv12 32)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_6|))))))) is different from false [2021-11-23 02:19:24,859 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_139| (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_2|))) (or (not (bvule |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_2| .cse0)) (exists ((|v_node_create_~temp~0#1.base_138| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_2|) (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_138| (_ bv12 32)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_6|)))) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_139| (_ bv12 32)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_6|))))) is different from false [2021-11-23 02:21:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 8 times theorem prover too weak. 0 trivial. 16 not checked. [2021-11-23 02:21:30,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:21:30,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535587042] [2021-11-23 02:21:30,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535587042] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:21:30,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1638537612] [2021-11-23 02:21:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:30,287 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:21:30,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:21:30,296 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:21:30,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 02:21:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:30,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 02:21:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:21:30,755 INFO L388 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 [2021-11-23 02:21:31,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-23 02:21:31,330 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:21:31,330 INFO L388 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 15 treesize of output 17 [2021-11-23 02:21:32,057 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:21:32,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 02:21:36,652 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:21:36,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-11-23 02:21:39,664 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:21:39,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 02:21:40,028 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:21:40,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 37 [2021-11-23 02:21:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:21:40,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:25:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 24 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:25:03,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1638537612] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:25:03,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:25:03,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 12, 10] total 35 [2021-11-23 02:25:03,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766696722] [2021-11-23 02:25:03,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:03,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:25:03,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:25:03,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:25:03,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=877, Unknown=95, NotChecked=130, Total=1260 [2021-11-23 02:25:03,758 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:25:04,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:04,351 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2021-11-23 02:25:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:25:04,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-11-23 02:25:04,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:04,354 INFO L225 Difference]: With dead ends: 105 [2021-11-23 02:25:04,354 INFO L226 Difference]: Without dead ends: 105 [2021-11-23 02:25:04,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 143 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 278.2s TimeCoverageRelationStatistics Valid=158, Invalid=877, Unknown=95, NotChecked=130, Total=1260 [2021-11-23 02:25:04,356 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 7 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:25:04,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 400 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 141 Unchecked, 0.6s Time] [2021-11-23 02:25:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-23 02:25:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-11-23 02:25:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 97 states have internal predecessors, (103), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:25:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2021-11-23 02:25:04,361 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 47 [2021-11-23 02:25:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:04,362 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2021-11-23 02:25:04,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:25:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2021-11-23 02:25:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 02:25:04,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:04,363 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 02:25:04,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-23 02:25:04,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-23 02:25:04,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:25:04,768 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:25:04,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:04,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1277544876, now seen corresponding path program 1 times [2021-11-23 02:25:04,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:25:04,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989028111] [2021-11-23 02:25:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:04,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:25:04,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:25:04,771 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:25:04,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 02:25:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:04,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:25:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:25:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:25:05,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:25:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:25:05,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:25:05,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989028111] [2021-11-23 02:25:05,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989028111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:25:05,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [313612083] [2021-11-23 02:25:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:05,569 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:25:05,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:25:05,570 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:25:05,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 02:25:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:05,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:25:05,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:25:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:25:06,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:25:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:25:06,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [313612083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:25:06,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876848988] [2021-11-23 02:25:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:06,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:25:06,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:25:06,323 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:25:06,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 02:25:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:06,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:25:06,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:25:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:25:06,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:25:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:25:06,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876848988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:25:06,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:25:06,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-23 02:25:06,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193474637] [2021-11-23 02:25:06,910 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:25:06,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:25:06,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:25:06,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:25:06,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:25:06,912 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 02:25:07,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:07,031 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-11-23 02:25:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:25:07,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2021-11-23 02:25:07,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:07,047 INFO L225 Difference]: With dead ends: 96 [2021-11-23 02:25:07,047 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 02:25:07,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:25:07,049 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 68 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:25:07,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 290 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:25:07,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 02:25:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-23 02:25:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 64 states have (on average 1.484375) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:25:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-11-23 02:25:07,059 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 48 [2021-11-23 02:25:07,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:07,060 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-11-23 02:25:07,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 02:25:07,061 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-11-23 02:25:07,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:25:07,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:07,068 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:07,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 02:25:07,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-23 02:25:07,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 02:25:07,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:25:07,689 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:25:07,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:07,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1018625491, now seen corresponding path program 1 times [2021-11-23 02:25:07,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:25:07,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983198397] [2021-11-23 02:25:07,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:07,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:25:07,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:25:07,692 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:25:07,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 02:25:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:07,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:25:07,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:25:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:25:07,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:25:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:25:08,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:25:08,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983198397] [2021-11-23 02:25:08,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983198397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:08,030 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:25:08,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:25:08,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271371530] [2021-11-23 02:25:08,031 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:08,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:25:08,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:25:08,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:25:08,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:25:08,033 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:25:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:08,337 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2021-11-23 02:25:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:25:08,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-11-23 02:25:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:08,340 INFO L225 Difference]: With dead ends: 106 [2021-11-23 02:25:08,340 INFO L226 Difference]: Without dead ends: 106 [2021-11-23 02:25:08,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:25:08,344 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 55 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:25:08,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 83 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:25:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-23 02:25:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-11-23 02:25:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 64 states have (on average 1.453125) internal successors, (93), 88 states have internal predecessors, (93), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:25:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-11-23 02:25:08,349 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 49 [2021-11-23 02:25:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:08,350 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-11-23 02:25:08,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:25:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-11-23 02:25:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:25:08,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:08,352 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:08,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 02:25:08,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:25:08,560 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:25:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:08,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1018625490, now seen corresponding path program 1 times [2021-11-23 02:25:08,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:25:08,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202925959] [2021-11-23 02:25:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:08,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:25:08,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:25:08,563 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:25:08,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 02:25:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:08,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:25:08,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:25:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:25:09,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:25:09,174 INFO L388 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 8 treesize of output 6 [2021-11-23 02:25:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:25:09,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:25:09,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202925959] [2021-11-23 02:25:09,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202925959] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:09,533 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:25:09,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-23 02:25:09,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686282393] [2021-11-23 02:25:09,533 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:09,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:25:09,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:25:09,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:25:09,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:25:09,535 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:25:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:09,927 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2021-11-23 02:25:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:25:09,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2021-11-23 02:25:09,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:09,930 INFO L225 Difference]: With dead ends: 92 [2021-11-23 02:25:09,930 INFO L226 Difference]: Without dead ends: 92 [2021-11-23 02:25:09,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:25:09,931 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 230 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:25:09,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 119 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:25:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-23 02:25:09,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-23 02:25:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.421875) internal successors, (91), 86 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:25:09,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2021-11-23 02:25:09,938 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 49 [2021-11-23 02:25:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:09,939 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2021-11-23 02:25:09,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:25:09,939 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2021-11-23 02:25:09,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 02:25:09,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:09,941 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:09,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 02:25:10,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:25:10,156 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-23 02:25:10,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:10,156 INFO L85 PathProgramCache]: Analyzing trace with hash 353447346, now seen corresponding path program 1 times [2021-11-23 02:25:10,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:25:10,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590689188] [2021-11-23 02:25:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:10,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:25:10,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:25:10,159 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:25:10,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 02:25:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 02:25:10,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:25:10,643 INFO L388 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 [2021-11-23 02:25:11,049 INFO L388 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 [2021-11-23 02:25:11,597 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 02:25:11,597 INFO L388 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 33 treesize of output 17 [2021-11-23 02:25:25,474 WARN L227 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 81 DAG size of output: 35 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:25:25,475 INFO L354 Elim1Store]: treesize reduction 304, result has 16.7 percent of original size [2021-11-23 02:25:25,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 99 [2021-11-23 02:25:25,616 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-23 02:25:25,617 INFO L388 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 97 treesize of output 108 [2021-11-23 02:25:27,131 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 02:25:27,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 46 [2021-11-23 02:25:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:25:27,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:25:39,388 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_8| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_8|)))) (_ bv1 1))) (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_209| (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_199| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_209| |c_#StackHeapBarrier|) (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_209|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_209| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209| (store (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209|) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) (bvadd (_ bv8 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) |v_node_create_~temp~0#1.offset_199| v_DerPreprocessor_1)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_8|)))) (_ bv1 1)))))))) is different from false [2021-11-23 02:25:42,084 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_10| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_209| (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_199| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_209| |c_#StackHeapBarrier|) (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_209|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_209| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209| (store (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209|) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) (bvadd (_ bv8 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) |v_node_create_~temp~0#1.offset_199| v_DerPreprocessor_1)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_8|)))) (_ bv1 1)))))) (= (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) |c_node_create_~temp~0#1.offset| v_DerPreprocessor_2)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_8|)))))) (_ bv0 1)))) is different from false [2021-11-23 02:25:44,319 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_209| (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_199| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_209| |c_#StackHeapBarrier|) (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_209|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_209| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209| (store (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209|) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) (bvadd (_ bv8 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) |v_node_create_~temp~0#1.offset_199| v_DerPreprocessor_1)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_8|)))) (_ bv1 1)))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) (bvadd |c_node_create_~temp~0#1.offset| (_ bv8 32)) (_ bv0 32)) |c_node_create_~temp~0#1.offset| v_DerPreprocessor_2)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_8|))))) (_ bv1 1))))) is different from false [2021-11-23 02:25:46,610 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|node_create_~temp~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_209| (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_199| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_209| |c_#StackHeapBarrier|) (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_209|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_209| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209| (store (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209|) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) (bvadd (_ bv8 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) |v_node_create_~temp~0#1.offset_199| v_DerPreprocessor_1)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_8|)))) (_ bv1 1)))))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) (bvadd (_ bv4 32) |node_create_~temp~0#1.offset|) (_ bv0 32)) (bvadd |node_create_~temp~0#1.offset| (_ bv8 32)) (_ bv0 32)) |node_create_~temp~0#1.offset| v_DerPreprocessor_2)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_8|))))))))))) is different from false [2021-11-23 02:26:38,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4486 treesize of output 4450 [2021-11-23 02:26:38,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:26:38,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590689188] [2021-11-23 02:26:38,203 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 02:26:38,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1864002887] [2021-11-23 02:26:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:38,204 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:26:38,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:26:38,205 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:26:38,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac0a7a0d-ae4f-4102-8d38-9cdb9c2a2af9/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 02:26:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:38,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 02:26:38,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:38,944 INFO L388 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 [2021-11-23 02:26:46,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 02:26:47,395 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-23 02:26:47,395 INFO L388 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 3 case distinctions, treesize of input 63 treesize of output 59 [2021-11-23 02:26:47,485 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-23 02:26:47,485 INFO L388 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 56 treesize of output 67 [2021-11-23 02:26:50,594 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 02:26:50,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 46 [2021-11-23 02:26:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:26:50,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:05,701 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_209| (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_199| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_209| |c_#StackHeapBarrier|) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_209| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209| (store (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209|) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) (bvadd (_ bv8 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) |v_node_create_~temp~0#1.offset_199| v_DerPreprocessor_1)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10|)))))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_209|)))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10|)))) (_ bv1 1))))) is different from false [2021-11-23 02:27:08,306 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12| (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32))) (or (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_209| (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_199| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_209| |c_#StackHeapBarrier|) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_209| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209| (store (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209|) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) (bvadd (_ bv8 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) |v_node_create_~temp~0#1.offset_199| v_DerPreprocessor_1)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10|)))))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_209|)))))) (= (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) |c_node_create_~temp~0#1.offset| v_DerPreprocessor_4)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10|)))))) (_ bv0 1)))) is different from false [2021-11-23 02:27:10,499 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10| (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_209| (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_199| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_209| |c_#StackHeapBarrier|) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_209| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209| (store (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209|) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) (bvadd (_ bv8 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) |v_node_create_~temp~0#1.offset_199| v_DerPreprocessor_1)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10|)))))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_209|)))))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) (bvadd |c_node_create_~temp~0#1.offset| (_ bv8 32)) (_ bv0 32)) |c_node_create_~temp~0#1.offset| v_DerPreprocessor_4)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10|))))))))) is different from false [2021-11-23 02:27:12,693 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10| (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|node_create_~temp~0#1.offset| (_ BitVec 32))) (or (= (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) (bvadd (_ bv4 32) |node_create_~temp~0#1.offset|) (_ bv0 32)) (bvadd |node_create_~temp~0#1.offset| (_ bv8 32)) (_ bv0 32)) |node_create_~temp~0#1.offset| v_DerPreprocessor_4)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10|)))))))) (_ bv1 1)) (_ bv0 1)) (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_209| (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_199| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_209| |c_#StackHeapBarrier|) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_209| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209| (store (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209|) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) (bvadd (_ bv8 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) |v_node_create_~temp~0#1.offset_199| v_DerPreprocessor_1)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10|)))))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_209|)))))))) is different from false [2021-11-23 02:27:14,915 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10| (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|node_create_~temp~0#1.offset| (_ BitVec 32))) (or (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_209| (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_199| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_209| |c_#StackHeapBarrier|) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_209| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209| (store (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_209|) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) (bvadd (_ bv8 32) |v_node_create_~temp~0#1.offset_199|) (_ bv0 32)) |v_node_create_~temp~0#1.offset_199| v_DerPreprocessor_1)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10|)))))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_209|)))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) (bvadd (_ bv4 32) |node_create_~temp~0#1.offset|) (_ bv0 32)) (bvadd |node_create_~temp~0#1.offset| (_ bv8 32)) (_ bv0 32)) |node_create_~temp~0#1.offset| v_DerPreprocessor_4)) |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_dll_append_~head#1.offset_BEFORE_CALL_10|))))))))) (_ bv1 1))))) is different from false [2021-11-23 02:27:53,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1056 treesize of output 1036