./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.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_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/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_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/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_68072d96-3cc9-4cbe-9808-63c2348f6492/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 f6eaec015dd6fdb220ef146938a83a65106037c982563310cbbb34d0417543f1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:14:13,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:14:13,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:14:13,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:14:13,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:14:13,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:14:13,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:14:13,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:14:13,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:14:13,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:14:13,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:14:13,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:14:13,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:14:13,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:14:13,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:14:13,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:14:13,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:14:13,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:14:13,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:14:13,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:14:13,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:14:13,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:14:13,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:14:13,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:14:13,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:14:13,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:14:13,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:14:13,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:14:13,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:14:13,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:14:13,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:14:13,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:14:13,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:14:13,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:14:13,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:14:13,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:14:13,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:14:13,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:14:13,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:14:13,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:14:13,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:14:13,153 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 02:14:13,185 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:14:13,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:14:13,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:14:13,186 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:14:13,187 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:14:13,187 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:14:13,187 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:14:13,188 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:14:13,188 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:14:13,188 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:14:13,189 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:14:13,189 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:14:13,190 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:14:13,190 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:14:13,190 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:14:13,191 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:14:13,191 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:14:13,191 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:14:13,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:14:13,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:14:13,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:14:13,200 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:14:13,200 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:14:13,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:14:13,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:14:13,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:14:13,201 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:14:13,201 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:14:13,202 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:14:13,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:14:13,203 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:14:13,203 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:14:13,203 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:14:13,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:14:13,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:14:13,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:14:13,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:14:13,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:14:13,205 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:14:13,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:14:13,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:14:13,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:14:13,207 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_68072d96-3cc9-4cbe-9808-63c2348f6492/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6eaec015dd6fdb220ef146938a83a65106037c982563310cbbb34d0417543f1 [2021-11-23 02:14:13,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:14:13,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:14:13,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:14:13,516 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:14:13,517 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:14:13,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2021-11-23 02:14:13,601 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/data/0851c7a51/9351ffd30bf94853b1f0e4f65788451e/FLAG7562ae3d9 [2021-11-23 02:14:14,250 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:14:14,251 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2021-11-23 02:14:14,267 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/data/0851c7a51/9351ffd30bf94853b1f0e4f65788451e/FLAG7562ae3d9 [2021-11-23 02:14:14,504 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/data/0851c7a51/9351ffd30bf94853b1f0e4f65788451e [2021-11-23 02:14:14,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:14:14,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:14:14,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:14:14,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:14:14,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:14:14,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:14:14" (1/1) ... [2021-11-23 02:14:14,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dffa074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:14, skipping insertion in model container [2021-11-23 02:14:14,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:14:14" (1/1) ... [2021-11-23 02:14:14,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:14:14,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:14:14,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:14:14,909 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:14:14,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:14:14,996 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:14:14,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:14 WrapperNode [2021-11-23 02:14:14,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:14:14,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:14:14,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:14:14,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:14:15,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:14" (1/1) ... [2021-11-23 02:14:15,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:14" (1/1) ... [2021-11-23 02:14:15,087 INFO L137 Inliner]: procedures = 116, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 128 [2021-11-23 02:14:15,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:14:15,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:14:15,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:14:15,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:14:15,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:14" (1/1) ... [2021-11-23 02:14:15,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:14" (1/1) ... [2021-11-23 02:14:15,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:14" (1/1) ... [2021-11-23 02:14:15,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:14" (1/1) ... [2021-11-23 02:14:15,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:14" (1/1) ... [2021-11-23 02:14:15,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:14" (1/1) ... [2021-11-23 02:14:15,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:14" (1/1) ... [2021-11-23 02:14:15,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:14:15,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:14:15,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:14:15,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:14:15,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:14" (1/1) ... [2021-11-23 02:14:15,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:14:15,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:15,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:14:15,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:14:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-23 02:14:15,236 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-23 02:14:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:14:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:14:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:14:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:14:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:14:15,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:14:15,416 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:14:15,418 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:14:15,481 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-23 02:14:15,841 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:14:15,903 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:14:15,903 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:14:15,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:14:15 BoogieIcfgContainer [2021-11-23 02:14:15,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:14:15,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:14:15,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:14:15,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:14:15,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:14:14" (1/3) ... [2021-11-23 02:14:15,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24033ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:14:15, skipping insertion in model container [2021-11-23 02:14:15,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:14" (2/3) ... [2021-11-23 02:14:15,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24033ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:14:15, skipping insertion in model container [2021-11-23 02:14:15,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:14:15" (3/3) ... [2021-11-23 02:14:15,918 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nondet_free_order-1.i [2021-11-23 02:14:15,923 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:14:15,924 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2021-11-23 02:14:15,982 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:14:15,992 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 02:14:15,993 INFO L340 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2021-11-23 02:14:16,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 129 states have internal predecessors, (136), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:16,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 02:14:16,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:16,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 02:14:16,046 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:16,054 INFO L85 PathProgramCache]: Analyzing trace with hash 218566, now seen corresponding path program 1 times [2021-11-23 02:14:16,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:16,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983111976] [2021-11-23 02:14:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:16,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:16,263 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 02:14:16,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983111976] [2021-11-23 02:14:16,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983111976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:16,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:16,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 02:14:16,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474678265] [2021-11-23 02:14:16,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:16,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:16,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:16,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:16,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:16,313 INFO L87 Difference]: Start difference. First operand has 131 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 129 states have internal predecessors, (136), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:16,439 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2021-11-23 02:14:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:16,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 02:14:16,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:16,450 INFO L225 Difference]: With dead ends: 128 [2021-11-23 02:14:16,451 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 02:14:16,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:16,456 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 44 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:16,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 164 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 02:14:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-23 02:14:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 64 states have (on average 2.0) internal successors, (128), 122 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2021-11-23 02:14:16,499 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 3 [2021-11-23 02:14:16,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:16,499 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2021-11-23 02:14:16,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2021-11-23 02:14:16,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 02:14:16,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:16,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 02:14:16,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:14:16,501 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:16,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:16,502 INFO L85 PathProgramCache]: Analyzing trace with hash 218567, now seen corresponding path program 1 times [2021-11-23 02:14:16,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:16,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154436077] [2021-11-23 02:14:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:16,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:16,543 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 02:14:16,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:16,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154436077] [2021-11-23 02:14:16,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154436077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:16,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:16,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 02:14:16,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700099863] [2021-11-23 02:14:16,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:16,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:16,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:16,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:16,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:16,547 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:16,597 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2021-11-23 02:14:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:16,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 02:14:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:16,600 INFO L225 Difference]: With dead ends: 120 [2021-11-23 02:14:16,600 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 02:14:16,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:16,602 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 122 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:16,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 108 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:14:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 02:14:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-11-23 02:14:16,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 64 states have (on average 1.953125) internal successors, (125), 119 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:16,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2021-11-23 02:14:16,616 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 3 [2021-11-23 02:14:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:16,616 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2021-11-23 02:14:16,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2021-11-23 02:14:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:14:16,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:16,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:16,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:14:16,618 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:16,619 INFO L85 PathProgramCache]: Analyzing trace with hash -8181935, now seen corresponding path program 1 times [2021-11-23 02:14:16,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:16,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765594811] [2021-11-23 02:14:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:16,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:16,682 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 02:14:16,682 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:16,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765594811] [2021-11-23 02:14:16,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765594811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:16,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:16,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:14:16,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662684074] [2021-11-23 02:14:16,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:16,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:16,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:16,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:16,684 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:16,727 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2021-11-23 02:14:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:16,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:14:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:16,730 INFO L225 Difference]: With dead ends: 128 [2021-11-23 02:14:16,730 INFO L226 Difference]: Without dead ends: 128 [2021-11-23 02:14:16,731 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 02:14:16,732 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 7 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:16,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 232 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:14:16,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-23 02:14:16,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2021-11-23 02:14:16,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 120 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2021-11-23 02:14:16,745 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 7 [2021-11-23 02:14:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:16,745 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2021-11-23 02:14:16,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2021-11-23 02:14:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:14:16,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:16,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:16,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:14:16,747 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:16,748 INFO L85 PathProgramCache]: Analyzing trace with hash -8345690, now seen corresponding path program 1 times [2021-11-23 02:14:16,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:16,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676481601] [2021-11-23 02:14:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:16,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:16,805 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 02:14:16,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:16,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676481601] [2021-11-23 02:14:16,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676481601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:16,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:16,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:14:16,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248125871] [2021-11-23 02:14:16,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:16,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:16,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:16,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:16,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:16,812 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:16,911 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2021-11-23 02:14:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:14:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:16,917 INFO L225 Difference]: With dead ends: 120 [2021-11-23 02:14:16,917 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 02:14:16,918 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 02:14:16,921 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 35 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:16,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 159 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:16,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 02:14:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-11-23 02:14:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 119 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:16,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2021-11-23 02:14:16,931 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 7 [2021-11-23 02:14:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:16,932 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2021-11-23 02:14:16,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2021-11-23 02:14:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:14:16,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:16,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:16,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:14:16,934 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:16,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:16,934 INFO L85 PathProgramCache]: Analyzing trace with hash -8345689, now seen corresponding path program 1 times [2021-11-23 02:14:16,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:16,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46343902] [2021-11-23 02:14:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:16,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:16,979 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 02:14:16,980 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:16,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46343902] [2021-11-23 02:14:16,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46343902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:16,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:16,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:14:16,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002900327] [2021-11-23 02:14:16,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:16,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:16,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:16,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:16,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:16,983 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:17,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:17,021 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-11-23 02:14:17,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:14:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:17,023 INFO L225 Difference]: With dead ends: 119 [2021-11-23 02:14:17,023 INFO L226 Difference]: Without dead ends: 119 [2021-11-23 02:14:17,023 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 02:14:17,025 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 117 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:17,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 110 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:14:17,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-23 02:14:17,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-23 02:14:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 65 states have (on average 1.9076923076923078) internal successors, (124), 118 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:17,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2021-11-23 02:14:17,041 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 7 [2021-11-23 02:14:17,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:17,044 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2021-11-23 02:14:17,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2021-11-23 02:14:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:14:17,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:17,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:17,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:14:17,046 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:17,046 INFO L85 PathProgramCache]: Analyzing trace with hash -258716379, now seen corresponding path program 1 times [2021-11-23 02:14:17,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:17,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299066682] [2021-11-23 02:14:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:17,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:17,121 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 02:14:17,122 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:17,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299066682] [2021-11-23 02:14:17,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299066682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:17,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:17,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:14:17,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442040135] [2021-11-23 02:14:17,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:17,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:14:17,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:17,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:14:17,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:14:17,144 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:17,292 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2021-11-23 02:14:17,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:14:17,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 02:14:17,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:17,293 INFO L225 Difference]: With dead ends: 123 [2021-11-23 02:14:17,294 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 02:14:17,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:14:17,306 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 71 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:17,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 265 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:17,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 02:14:17,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-11-23 02:14:17,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.8823529411764706) internal successors, (128), 121 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 128 transitions. [2021-11-23 02:14:17,315 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 128 transitions. Word has length 8 [2021-11-23 02:14:17,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:17,315 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 128 transitions. [2021-11-23 02:14:17,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:17,316 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 128 transitions. [2021-11-23 02:14:17,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:14:17,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:17,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:17,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:14:17,317 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:17,317 INFO L85 PathProgramCache]: Analyzing trace with hash -258716378, now seen corresponding path program 1 times [2021-11-23 02:14:17,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:17,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276034120] [2021-11-23 02:14:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:17,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:17,462 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 02:14:17,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:17,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276034120] [2021-11-23 02:14:17,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276034120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:17,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:17,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:14:17,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535420483] [2021-11-23 02:14:17,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:17,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:14:17,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:14:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:14:17,467 INFO L87 Difference]: Start difference. First operand 122 states and 128 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:17,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:17,567 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2021-11-23 02:14:17,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:14:17,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 02:14:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:17,569 INFO L225 Difference]: With dead ends: 122 [2021-11-23 02:14:17,569 INFO L226 Difference]: Without dead ends: 122 [2021-11-23 02:14:17,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:14:17,573 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 160 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:17,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 249 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:17,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-23 02:14:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-23 02:14:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.8676470588235294) internal successors, (127), 121 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:17,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2021-11-23 02:14:17,600 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 8 [2021-11-23 02:14:17,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:17,600 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2021-11-23 02:14:17,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:17,601 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2021-11-23 02:14:17,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:14:17,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:17,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:17,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:14:17,602 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:17,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2051460876, now seen corresponding path program 1 times [2021-11-23 02:14:17,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:17,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616662527] [2021-11-23 02:14:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:17,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:17,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:17,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616662527] [2021-11-23 02:14:17,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616662527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:17,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:17,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:14:17,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664289354] [2021-11-23 02:14:17,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:17,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:14:17,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:17,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:14:17,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:14:17,679 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:17,767 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2021-11-23 02:14:17,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:14:17,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 02:14:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:17,772 INFO L225 Difference]: With dead ends: 120 [2021-11-23 02:14:17,772 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 02:14:17,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:14:17,774 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 61 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:17,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 212 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 02:14:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-11-23 02:14:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.838235294117647) internal successors, (125), 119 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2021-11-23 02:14:17,791 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 11 [2021-11-23 02:14:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:17,791 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2021-11-23 02:14:17,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2021-11-23 02:14:17,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:14:17,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:17,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:17,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:14:17,792 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:17,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2051460877, now seen corresponding path program 1 times [2021-11-23 02:14:17,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:17,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267154094] [2021-11-23 02:14:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:17,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:17,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:17,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267154094] [2021-11-23 02:14:17,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267154094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:17,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402568749] [2021-11-23 02:14:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:17,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:17,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:17,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:17,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:14:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:17,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:14:17,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:17,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:18,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402568749] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:18,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667297009] [2021-11-23 02:14:18,027 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:14:18,028 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:14:18,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:14:18,038 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:14:18,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:14:18,132 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 02:14:18,183 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 02:14:18,207 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 02:14:18,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,268 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 21 treesize of output 20 [2021-11-23 02:14:18,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,307 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 21 treesize of output 20 [2021-11-23 02:14:18,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:14:18,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,442 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 28 treesize of output 30 [2021-11-23 02:14:18,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,471 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 28 treesize of output 30 [2021-11-23 02:14:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 02:14:18,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 02:14:18,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-11-23 02:14:18,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:18,864 INFO L354 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2021-11-23 02:14:18,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 333 treesize of output 313 [2021-11-23 02:14:18,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:18,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:18,929 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 02:14:18,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 329 treesize of output 324 [2021-11-23 02:14:19,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:19,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:19,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:19,213 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 02:14:19,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 448 treesize of output 410 [2021-11-23 02:14:19,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:19,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:19,334 INFO L354 Elim1Store]: treesize reduction 220, result has 15.7 percent of original size [2021-11-23 02:14:19,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 440 treesize of output 385 [2021-11-23 02:14:19,559 INFO L354 Elim1Store]: treesize reduction 88, result has 17.0 percent of original size [2021-11-23 02:14:19,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 411 treesize of output 403 [2021-11-23 02:14:19,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:19,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:19,799 INFO L354 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2021-11-23 02:14:19,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 333 treesize of output 313 [2021-11-23 02:14:19,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:19,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:19,857 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 02:14:19,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 329 treesize of output 324 [2021-11-23 02:14:19,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:19,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:20,057 INFO L354 Elim1Store]: treesize reduction 220, result has 15.7 percent of original size [2021-11-23 02:14:20,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 448 treesize of output 389 [2021-11-23 02:14:20,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:20,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:20,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:20,161 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 02:14:20,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 445 treesize of output 407 [2021-11-23 02:14:20,290 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 02:14:20,301 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 02:14:20,419 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 02:14:20,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 411 treesize of output 399 [2021-11-23 02:14:20,532 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:14:22,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2184#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (<= |#NULL.offset| 0) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (< (select |#length| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 8)) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-23 02:14:22,089 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:14:22,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:14:22,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2021-11-23 02:14:22,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057753060] [2021-11-23 02:14:22,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:14:22,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:14:22,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:22,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:14:22,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:14:22,091 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:22,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:22,126 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-11-23 02:14:22,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:14:22,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 02:14:22,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:22,128 INFO L225 Difference]: With dead ends: 121 [2021-11-23 02:14:22,128 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 02:14:22,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:14:22,130 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 10 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:22,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 332 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:14:22,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 02:14:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-23 02:14:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 69 states have (on average 1.826086956521739) internal successors, (126), 120 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2021-11-23 02:14:22,140 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 11 [2021-11-23 02:14:22,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:22,140 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2021-11-23 02:14:22,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:22,140 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2021-11-23 02:14:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 02:14:22,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:22,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:22,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:22,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:22,361 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:22,362 INFO L85 PathProgramCache]: Analyzing trace with hash -834298677, now seen corresponding path program 1 times [2021-11-23 02:14:22,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:22,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834979103] [2021-11-23 02:14:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:22,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:22,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:22,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834979103] [2021-11-23 02:14:22,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834979103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:22,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131919841] [2021-11-23 02:14:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:22,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:22,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:22,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:22,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:14:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:22,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:14:22,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:22,559 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 02:14:22,565 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 02:14:22,610 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:14:22,611 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 02:14:22,620 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:14:22,620 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 02:14:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:22,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:22,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131919841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:22,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111366663] [2021-11-23 02:14:22,851 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:14:22,851 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:14:22,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:14:22,852 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:14:22,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:14:22,874 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 02:14:22,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 02:14:22,904 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 02:14:22,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:22,925 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 21 treesize of output 20 [2021-11-23 02:14:22,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:22,934 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 21 treesize of output 20 [2021-11-23 02:14:22,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:22,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:14:22,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:22,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:22,996 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 28 treesize of output 30 [2021-11-23 02:14:23,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,022 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 28 treesize of output 30 [2021-11-23 02:14:23,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,066 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-11-23 02:14:23,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 84 [2021-11-23 02:14:23,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2021-11-23 02:14:23,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-23 02:14:23,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:23,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:23,226 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:14:23,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 362 treesize of output 306 [2021-11-23 02:14:23,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:23,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:23,269 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 02:14:23,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 358 treesize of output 353 [2021-11-23 02:14:23,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:23,430 INFO L354 Elim1Store]: treesize reduction 216, result has 15.3 percent of original size [2021-11-23 02:14:23,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 458 treesize of output 384 [2021-11-23 02:14:23,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:23,537 INFO L354 Elim1Store]: treesize reduction 180, result has 14.7 percent of original size [2021-11-23 02:14:23,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 401 treesize of output 365 [2021-11-23 02:14:23,681 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-23 02:14:23,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 398 treesize of output 394 [2021-11-23 02:14:23,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:23,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:23,899 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:14:23,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 362 treesize of output 306 [2021-11-23 02:14:23,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:23,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:23,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:23,943 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 02:14:23,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 358 treesize of output 353 [2021-11-23 02:14:24,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:24,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:24,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:24,113 INFO L354 Elim1Store]: treesize reduction 216, result has 15.3 percent of original size [2021-11-23 02:14:24,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 458 treesize of output 384 [2021-11-23 02:14:24,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:24,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:24,190 INFO L354 Elim1Store]: treesize reduction 180, result has 14.7 percent of original size [2021-11-23 02:14:24,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 401 treesize of output 365 [2021-11-23 02:14:24,364 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 02:14:24,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 398 treesize of output 388 [2021-11-23 02:14:24,486 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:14:25,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [111366663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:25,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:14:25,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 15 [2021-11-23 02:14:25,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454524352] [2021-11-23 02:14:25,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:25,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:14:25,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:25,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:14:25,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:14:25,608 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:26,218 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2021-11-23 02:14:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:14:26,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 02:14:26,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:26,220 INFO L225 Difference]: With dead ends: 120 [2021-11-23 02:14:26,220 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 02:14:26,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:14:26,221 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 114 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:26,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 240 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:14:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 02:14:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-11-23 02:14:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 69 states have (on average 1.8115942028985508) internal successors, (125), 119 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2021-11-23 02:14:26,225 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 12 [2021-11-23 02:14:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:26,225 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2021-11-23 02:14:26,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2021-11-23 02:14:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:14:26,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:26,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:26,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:26,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:14:26,429 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash 388637000, now seen corresponding path program 2 times [2021-11-23 02:14:26,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:26,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728698367] [2021-11-23 02:14:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:26,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:14:26,502 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:26,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728698367] [2021-11-23 02:14:26,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728698367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:26,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:26,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:14:26,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538782791] [2021-11-23 02:14:26,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:26,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:14:26,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:26,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:14:26,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:14:26,504 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:26,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:26,541 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-11-23 02:14:26,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:14:26,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 02:14:26,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:26,542 INFO L225 Difference]: With dead ends: 119 [2021-11-23 02:14:26,543 INFO L226 Difference]: Without dead ends: 119 [2021-11-23 02:14:26,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:14:26,544 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 223 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:26,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 109 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:14:26,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-23 02:14:26,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-23 02:14:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 69 states have (on average 1.7971014492753623) internal successors, (124), 118 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2021-11-23 02:14:26,548 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 15 [2021-11-23 02:14:26,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:26,549 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2021-11-23 02:14:26,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2021-11-23 02:14:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:14:26,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:26,550 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:26,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:14:26,551 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:26,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:26,551 INFO L85 PathProgramCache]: Analyzing trace with hash -837150459, now seen corresponding path program 1 times [2021-11-23 02:14:26,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:26,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033131205] [2021-11-23 02:14:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:26,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:14:26,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:26,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033131205] [2021-11-23 02:14:26,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033131205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:26,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:26,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:14:26,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628694701] [2021-11-23 02:14:26,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:26,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:26,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:26,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:26,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:26,617 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:26,680 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2021-11-23 02:14:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:26,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 02:14:26,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:26,682 INFO L225 Difference]: With dead ends: 116 [2021-11-23 02:14:26,682 INFO L226 Difference]: Without dead ends: 116 [2021-11-23 02:14:26,682 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 02:14:26,683 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 22 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:26,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 149 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-23 02:14:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-11-23 02:14:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 69 states have (on average 1.7536231884057971) internal successors, (121), 115 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2021-11-23 02:14:26,688 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 16 [2021-11-23 02:14:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:26,688 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2021-11-23 02:14:26,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2021-11-23 02:14:26,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:14:26,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:26,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:26,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:14:26,689 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:26,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:26,690 INFO L85 PathProgramCache]: Analyzing trace with hash -837150458, now seen corresponding path program 1 times [2021-11-23 02:14:26,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:26,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478339636] [2021-11-23 02:14:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:26,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:14:26,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:26,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478339636] [2021-11-23 02:14:26,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478339636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:26,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:26,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:14:26,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589726226] [2021-11-23 02:14:26,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:26,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:14:26,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:26,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:14:26,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:14:26,781 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:26,867 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-11-23 02:14:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:14:26,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 02:14:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:26,869 INFO L225 Difference]: With dead ends: 109 [2021-11-23 02:14:26,869 INFO L226 Difference]: Without dead ends: 109 [2021-11-23 02:14:26,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:14:26,870 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 301 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:26,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 78 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-23 02:14:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-23 02:14:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 69 states have (on average 1.6521739130434783) internal successors, (114), 108 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-11-23 02:14:26,876 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 16 [2021-11-23 02:14:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:26,876 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-11-23 02:14:26,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:26,877 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-11-23 02:14:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:14:26,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:26,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:26,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:14:26,878 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:26,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:26,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1714902765, now seen corresponding path program 1 times [2021-11-23 02:14:26,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:26,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514078893] [2021-11-23 02:14:26,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:26,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:14:26,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:26,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514078893] [2021-11-23 02:14:26,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514078893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:26,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:26,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:14:26,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892758522] [2021-11-23 02:14:26,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:26,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:14:26,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:26,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:14:26,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:14:26,959 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:27,041 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-11-23 02:14:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:14:27,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 02:14:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:27,045 INFO L225 Difference]: With dead ends: 104 [2021-11-23 02:14:27,045 INFO L226 Difference]: Without dead ends: 104 [2021-11-23 02:14:27,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:14:27,046 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 282 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:27,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 66 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-23 02:14:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-23 02:14:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 69 states have (on average 1.5797101449275361) internal successors, (109), 103 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-11-23 02:14:27,050 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 20 [2021-11-23 02:14:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:27,051 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-11-23 02:14:27,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:27,051 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-11-23 02:14:27,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:14:27,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:27,052 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:27,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:14:27,052 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:27,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:27,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1714863783, now seen corresponding path program 1 times [2021-11-23 02:14:27,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:27,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481642642] [2021-11-23 02:14:27,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:27,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:14:27,173 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:27,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481642642] [2021-11-23 02:14:27,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481642642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:27,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:27,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:14:27,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724798572] [2021-11-23 02:14:27,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:27,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:14:27,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:27,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:14:27,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:14:27,175 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:27,259 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-11-23 02:14:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:14:27,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 02:14:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:27,260 INFO L225 Difference]: With dead ends: 99 [2021-11-23 02:14:27,260 INFO L226 Difference]: Without dead ends: 99 [2021-11-23 02:14:27,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:14:27,263 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 355 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:27,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 68 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-23 02:14:27,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-23 02:14:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 69 states have (on average 1.5072463768115942) internal successors, (104), 98 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-11-23 02:14:27,267 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 20 [2021-11-23 02:14:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:27,268 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-11-23 02:14:27,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-11-23 02:14:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:14:27,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:27,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:27,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:14:27,270 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:27,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1714864999, now seen corresponding path program 1 times [2021-11-23 02:14:27,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:27,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760946799] [2021-11-23 02:14:27,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:27,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:27,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:27,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760946799] [2021-11-23 02:14:27,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760946799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:27,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786452410] [2021-11-23 02:14:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:27,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:27,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:27,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:27,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:14:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:27,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 02:14:27,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:27,526 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 02:14:27,571 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:14:27,571 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 12 treesize of output 14 [2021-11-23 02:14:27,663 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 02:14:27,663 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 02:14:27,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:14:27,776 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 02:14:27,777 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 02:14:27,888 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:14:27,889 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 2 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:14:27,965 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 02:14:27,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 46 [2021-11-23 02:14:28,061 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 02:14:28,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 44 treesize of output 24 [2021-11-23 02:14:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:28,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:28,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786452410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:28,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542545243] [2021-11-23 02:14:28,576 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 02:14:28,577 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:14:28,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:14:28,577 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:14:28,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:14:28,610 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 02:14:28,626 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 02:14:28,635 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 02:14:28,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,651 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 21 treesize of output 20 [2021-11-23 02:14:28,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,663 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 21 treesize of output 20 [2021-11-23 02:14:28,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:14:28,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,728 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 28 treesize of output 30 [2021-11-23 02:14:28,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,752 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 28 treesize of output 30 [2021-11-23 02:14:28,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 02:14:28,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 02:14:28,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2021-11-23 02:14:28,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:28,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:28,928 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:14:28,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 310 [2021-11-23 02:14:28,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:28,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:28,966 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:14:28,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 311 treesize of output 306 [2021-11-23 02:14:29,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:29,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:29,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:29,122 INFO L354 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2021-11-23 02:14:29,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 435 treesize of output 408 [2021-11-23 02:14:29,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:29,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:29,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:29,197 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-23 02:14:29,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 427 treesize of output 372 [2021-11-23 02:14:29,354 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 02:14:29,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 393 treesize of output 381 [2021-11-23 02:14:29,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:29,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:29,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:29,545 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:14:29,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 310 [2021-11-23 02:14:29,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:29,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:29,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:29,585 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:14:29,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 311 treesize of output 306 [2021-11-23 02:14:29,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:29,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:29,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:29,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:29,736 INFO L354 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2021-11-23 02:14:29,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 435 treesize of output 408 [2021-11-23 02:14:29,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:29,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:29,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:29,814 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-23 02:14:29,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 427 treesize of output 372 [2021-11-23 02:14:29,912 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 02:14:29,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 02:14:29,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:29,951 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 21 treesize of output 20 [2021-11-23 02:14:29,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:29,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 02:14:30,195 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 02:14:30,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 393 treesize of output 381 [2021-11-23 02:14:30,283 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:14:33,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4034#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0)) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) 1) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 02:14:33,127 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:14:33,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:14:33,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2021-11-23 02:14:33,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817651335] [2021-11-23 02:14:33,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:14:33,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 02:14:33,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:33,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 02:14:33,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 02:14:33,130 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:33,496 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-11-23 02:14:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:14:33,496 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 02:14:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:33,497 INFO L225 Difference]: With dead ends: 94 [2021-11-23 02:14:33,498 INFO L226 Difference]: Without dead ends: 94 [2021-11-23 02:14:33,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 02:14:33,501 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 93 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:33,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1058 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 221 Invalid, 0 Unknown, 131 Unchecked, 0.2s Time] [2021-11-23 02:14:33,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-23 02:14:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-23 02:14:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.434782608695652) internal successors, (99), 93 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:33,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-11-23 02:14:33,508 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 20 [2021-11-23 02:14:33,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:33,508 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-11-23 02:14:33,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-11-23 02:14:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:14:33,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:33,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:33,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:33,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:33,728 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:33,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:33,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1621169541, now seen corresponding path program 1 times [2021-11-23 02:14:33,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:33,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409388367] [2021-11-23 02:14:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:33,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:14:33,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:33,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409388367] [2021-11-23 02:14:33,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409388367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:33,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:33,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:14:33,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287215171] [2021-11-23 02:14:33,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:33,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:14:33,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:33,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:14:33,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:14:33,867 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:33,975 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-11-23 02:14:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:14:33,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 02:14:33,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:33,979 INFO L225 Difference]: With dead ends: 89 [2021-11-23 02:14:33,979 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 02:14:33,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:14:33,980 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 316 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:33,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 32 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 02:14:33,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-23 02:14:33,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 88 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2021-11-23 02:14:33,984 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 21 [2021-11-23 02:14:33,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:33,984 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2021-11-23 02:14:33,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:33,984 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2021-11-23 02:14:33,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:14:33,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:33,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:33,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:14:33,986 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:33,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:33,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1621207275, now seen corresponding path program 1 times [2021-11-23 02:14:33,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:33,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462129922] [2021-11-23 02:14:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:33,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:34,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:34,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462129922] [2021-11-23 02:14:34,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462129922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:34,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986757028] [2021-11-23 02:14:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:34,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:34,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:34,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:34,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:14:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:34,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 02:14:34,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:34,244 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 02:14:34,295 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 02:14:34,296 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 02:14:34,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 02:14:34,365 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 02:14:34,366 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-23 02:14:34,445 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 02:14:34,446 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-11-23 02:14:34,535 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 02:14:34,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 56 [2021-11-23 02:14:34,624 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 02:14:34,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 29 [2021-11-23 02:14:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:34,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:38,036 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (<= (+ (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) 1) |c_#StackHeapBarrier|)) is different from false [2021-11-23 02:14:38,083 INFO L354 Elim1Store]: treesize reduction 83, result has 30.8 percent of original size [2021-11-23 02:14:38,084 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 51 [2021-11-23 02:14:38,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:38,099 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 51 treesize of output 67 [2021-11-23 02:14:38,146 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 6 treesize of output 4 [2021-11-23 02:14:38,218 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 4 [2021-11-23 02:14:38,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:38,239 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 19 treesize of output 23 [2021-11-23 02:14:38,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:38,297 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 76 treesize of output 92 [2021-11-23 02:14:38,604 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:14:38,605 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 44 treesize of output 43 [2021-11-23 02:14:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 02:14:38,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986757028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:38,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [410151973] [2021-11-23 02:14:38,639 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 02:14:38,639 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:14:38,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:14:38,640 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:14:38,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:14:38,659 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 02:14:38,675 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 02:14:38,683 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 02:14:38,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,699 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 21 treesize of output 20 [2021-11-23 02:14:38,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,712 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 21 treesize of output 20 [2021-11-23 02:14:38,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:14:38,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,762 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 28 treesize of output 30 [2021-11-23 02:14:38,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,774 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 28 treesize of output 30 [2021-11-23 02:14:38,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,820 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-23 02:14:38,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 84 [2021-11-23 02:14:38,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,839 INFO L354 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2021-11-23 02:14:38,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 84 [2021-11-23 02:14:38,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-11-23 02:14:38,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:38,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:38,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,003 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 02:14:39,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 335 treesize of output 322 [2021-11-23 02:14:39,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:39,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,047 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-23 02:14:39,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 331 treesize of output 335 [2021-11-23 02:14:39,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:39,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,216 INFO L354 Elim1Store]: treesize reduction 218, result has 14.8 percent of original size [2021-11-23 02:14:39,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 475 treesize of output 382 [2021-11-23 02:14:39,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:39,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,307 INFO L354 Elim1Store]: treesize reduction 238, result has 16.2 percent of original size [2021-11-23 02:14:39,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 464 treesize of output 440 [2021-11-23 02:14:39,447 INFO L354 Elim1Store]: treesize reduction 188, result has 10.0 percent of original size [2021-11-23 02:14:39,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 433 treesize of output 412 [2021-11-23 02:14:39,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:39,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,664 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-23 02:14:39,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 335 treesize of output 339 [2021-11-23 02:14:39,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:39,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,708 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 02:14:39,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 331 treesize of output 318 [2021-11-23 02:14:39,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:39,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,880 INFO L354 Elim1Store]: treesize reduction 218, result has 14.8 percent of original size [2021-11-23 02:14:39,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 475 treesize of output 382 [2021-11-23 02:14:39,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:39,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:39,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:39,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:39,982 INFO L354 Elim1Store]: treesize reduction 238, result has 16.2 percent of original size [2021-11-23 02:14:39,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 480 treesize of output 456 [2021-11-23 02:14:40,077 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 02:14:40,083 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 02:14:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:40,112 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 21 treesize of output 20 [2021-11-23 02:14:40,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:40,123 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 21 treesize of output 20 [2021-11-23 02:14:40,367 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-11-23 02:14:40,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 482 treesize of output 473 [2021-11-23 02:14:40,465 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:14:43,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4581#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) 1) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |#StackHeapBarrier| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 02:14:43,690 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:14:43,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:14:43,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2021-11-23 02:14:43,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273172532] [2021-11-23 02:14:43,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:14:43,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 02:14:43,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:43,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 02:14:43,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1038, Unknown=2, NotChecked=66, Total=1260 [2021-11-23 02:14:43,692 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:43,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:43,976 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-11-23 02:14:43,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:14:43,977 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 02:14:43,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:43,978 INFO L225 Difference]: With dead ends: 126 [2021-11-23 02:14:43,978 INFO L226 Difference]: Without dead ends: 126 [2021-11-23 02:14:43,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=161, Invalid=1101, Unknown=2, NotChecked=68, Total=1332 [2021-11-23 02:14:43,979 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 72 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:43,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 613 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 300 Invalid, 0 Unknown, 319 Unchecked, 0.2s Time] [2021-11-23 02:14:43,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-23 02:14:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2021-11-23 02:14:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 122 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2021-11-23 02:14:43,984 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 21 [2021-11-23 02:14:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:43,985 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2021-11-23 02:14:43,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2021-11-23 02:14:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 02:14:43,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:43,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:44,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:44,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 02:14:44,205 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:44,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:44,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1283351963, now seen corresponding path program 1 times [2021-11-23 02:14:44,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:44,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291501304] [2021-11-23 02:14:44,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:44,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:14:44,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:44,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291501304] [2021-11-23 02:14:44,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291501304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:44,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:44,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:14:44,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040404260] [2021-11-23 02:14:44,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:44,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:14:44,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:44,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:14:44,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:14:44,300 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:44,437 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2021-11-23 02:14:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:14:44,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 02:14:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:44,438 INFO L225 Difference]: With dead ends: 122 [2021-11-23 02:14:44,438 INFO L226 Difference]: Without dead ends: 122 [2021-11-23 02:14:44,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:14:44,439 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 178 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:44,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 161 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:44,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-23 02:14:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-23 02:14:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 103 states have (on average 1.3009708737864079) internal successors, (134), 121 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 134 transitions. [2021-11-23 02:14:44,443 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 134 transitions. Word has length 22 [2021-11-23 02:14:44,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:44,444 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 134 transitions. [2021-11-23 02:14:44,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 134 transitions. [2021-11-23 02:14:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 02:14:44,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:44,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:44,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:14:44,445 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:44,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1282182171, now seen corresponding path program 1 times [2021-11-23 02:14:44,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:44,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669660894] [2021-11-23 02:14:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:44,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:44,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:44,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669660894] [2021-11-23 02:14:44,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669660894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:44,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534145949] [2021-11-23 02:14:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:44,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:44,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:44,573 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:44,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:14:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:44,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 02:14:44,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:44,658 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 02:14:44,695 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 02:14:44,696 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 02:14:44,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:14:44,746 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 02:14:44,747 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 1 case distinctions, treesize of input 52 treesize of output 51 [2021-11-23 02:14:44,829 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 02:14:44,830 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-11-23 02:14:44,912 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 02:14:44,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 56 [2021-11-23 02:14:44,985 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 02:14:44,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 29 [2021-11-23 02:14:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:44,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:45,166 INFO L354 Elim1Store]: treesize reduction 5, result has 88.9 percent of original size [2021-11-23 02:14:45,166 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 49 treesize of output 48 [2021-11-23 02:14:51,534 INFO L354 Elim1Store]: treesize reduction 93, result has 22.5 percent of original size [2021-11-23 02:14:51,534 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 39 [2021-11-23 02:14:51,542 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:14:51,542 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 35 treesize of output 33 [2021-11-23 02:14:51,546 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 40 treesize of output 36 [2021-11-23 02:14:51,549 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 32 treesize of output 28 [2021-11-23 02:14:51,661 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:14:51,662 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 25 treesize of output 24 [2021-11-23 02:14:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:51,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534145949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:51,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1000656600] [2021-11-23 02:14:51,677 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-23 02:14:51,678 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:14:51,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:14:51,678 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:14:51,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:14:51,694 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 02:14:51,712 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 02:14:51,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 02:14:51,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,743 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 21 treesize of output 20 [2021-11-23 02:14:51,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,751 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 21 treesize of output 20 [2021-11-23 02:14:51,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:14:51,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,812 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 28 treesize of output 30 [2021-11-23 02:14:51,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,824 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 28 treesize of output 30 [2021-11-23 02:14:51,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,866 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-11-23 02:14:51,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 84 [2021-11-23 02:14:51,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-11-23 02:14:51,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 32 [2021-11-23 02:14:51,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:51,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:51,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:52,001 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:14:52,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 310 [2021-11-23 02:14:52,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:52,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:52,043 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:14:52,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 311 treesize of output 306 [2021-11-23 02:14:52,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:52,195 INFO L354 Elim1Store]: treesize reduction 208, result has 15.8 percent of original size [2021-11-23 02:14:52,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 447 treesize of output 388 [2021-11-23 02:14:52,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:52,258 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 02:14:52,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 444 treesize of output 408 [2021-11-23 02:14:52,406 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-23 02:14:52,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 405 treesize of output 399 [2021-11-23 02:14:52,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:52,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:52,588 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:14:52,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 310 [2021-11-23 02:14:52,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:52,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:52,638 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:14:52,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 311 treesize of output 306 [2021-11-23 02:14:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:52,806 INFO L354 Elim1Store]: treesize reduction 208, result has 15.8 percent of original size [2021-11-23 02:14:52,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 447 treesize of output 388 [2021-11-23 02:14:52,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:52,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:52,890 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 02:14:52,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 444 treesize of output 408 [2021-11-23 02:14:52,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 02:14:52,987 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 02:14:53,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,021 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 21 treesize of output 20 [2021-11-23 02:14:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,031 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 21 treesize of output 20 [2021-11-23 02:14:53,277 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-23 02:14:53,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 405 treesize of output 399 [2021-11-23 02:14:53,367 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:14:56,981 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5253#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) 1) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| 0)) (not (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 02:14:56,981 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:14:56,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:14:56,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2021-11-23 02:14:56,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975760661] [2021-11-23 02:14:56,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:14:56,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:14:56,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:56,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:14:56,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=991, Unknown=4, NotChecked=0, Total=1190 [2021-11-23 02:14:56,983 INFO L87 Difference]: Start difference. First operand 122 states and 134 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:57,327 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2021-11-23 02:14:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:14:57,327 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 02:14:57,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:57,328 INFO L225 Difference]: With dead ends: 123 [2021-11-23 02:14:57,328 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 02:14:57,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=237, Invalid=1241, Unknown=4, NotChecked=0, Total=1482 [2021-11-23 02:14:57,329 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 12 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:57,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 633 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 340 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2021-11-23 02:14:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 02:14:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-23 02:14:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 104 states have (on average 1.2980769230769231) internal successors, (135), 122 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2021-11-23 02:14:57,333 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 22 [2021-11-23 02:14:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:57,334 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2021-11-23 02:14:57,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2021-11-23 02:14:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:14:57,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:57,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:57,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:57,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:57,536 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:14:57,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:57,537 INFO L85 PathProgramCache]: Analyzing trace with hash -863443528, now seen corresponding path program 1 times [2021-11-23 02:14:57,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:57,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643546587] [2021-11-23 02:14:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:57,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:57,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:57,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643546587] [2021-11-23 02:14:57,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643546587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:57,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867893573] [2021-11-23 02:14:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:57,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:57,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:57,697 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:57,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:14:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:57,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 02:14:57,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:57,812 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:14:57,812 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 11 treesize of output 11 [2021-11-23 02:14:57,887 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 21 treesize of output 17 [2021-11-23 02:14:57,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:57,909 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 27 treesize of output 23 [2021-11-23 02:14:58,083 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:14:58,083 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 02:14:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:58,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:58,234 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 13 treesize of output 11 [2021-11-23 02:14:58,236 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 24 treesize of output 22 [2021-11-23 02:14:58,244 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 14 treesize of output 12 [2021-11-23 02:14:58,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,253 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 6 treesize of output 4 [2021-11-23 02:14:58,306 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:14:58,307 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 13 treesize of output 12 [2021-11-23 02:14:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:58,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867893573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:58,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1233732390] [2021-11-23 02:14:58,327 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:14:58,327 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:14:58,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:14:58,328 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:14:58,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:14:58,343 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 02:14:58,357 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 02:14:58,363 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 02:14:58,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,379 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 21 treesize of output 20 [2021-11-23 02:14:58,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,388 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 21 treesize of output 20 [2021-11-23 02:14:58,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:14:58,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,441 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 28 treesize of output 30 [2021-11-23 02:14:58,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,453 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 28 treesize of output 30 [2021-11-23 02:14:58,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,500 INFO L354 Elim1Store]: treesize reduction 123, result has 10.9 percent of original size [2021-11-23 02:14:58,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 105 [2021-11-23 02:14:58,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,537 INFO L354 Elim1Store]: treesize reduction 111, result has 11.9 percent of original size [2021-11-23 02:14:58,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 92 [2021-11-23 02:14:58,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 40 [2021-11-23 02:14:58,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:58,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:58,700 INFO L354 Elim1Store]: treesize reduction 138, result has 16.9 percent of original size [2021-11-23 02:14:58,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 363 treesize of output 350 [2021-11-23 02:14:58,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:58,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:58,751 INFO L354 Elim1Store]: treesize reduction 134, result has 11.8 percent of original size [2021-11-23 02:14:58,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 359 treesize of output 342 [2021-11-23 02:14:58,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:58,912 INFO L354 Elim1Store]: treesize reduction 302, result has 12.2 percent of original size [2021-11-23 02:14:58,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 536 treesize of output 428 [2021-11-23 02:14:58,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:58,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:58,971 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 02:14:58,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 509 treesize of output 437 [2021-11-23 02:14:59,114 INFO L354 Elim1Store]: treesize reduction 216, result has 8.9 percent of original size [2021-11-23 02:14:59,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 470 treesize of output 441 [2021-11-23 02:14:59,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:59,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:59,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:59,283 INFO L354 Elim1Store]: treesize reduction 126, result has 17.1 percent of original size [2021-11-23 02:14:59,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 363 treesize of output 354 [2021-11-23 02:14:59,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:59,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:59,337 INFO L354 Elim1Store]: treesize reduction 148, result has 10.8 percent of original size [2021-11-23 02:14:59,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 359 treesize of output 336 [2021-11-23 02:14:59,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:59,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:59,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:59,480 INFO L354 Elim1Store]: treesize reduction 208, result has 15.8 percent of original size [2021-11-23 02:14:59,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 536 treesize of output 417 [2021-11-23 02:14:59,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:59,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:59,563 INFO L354 Elim1Store]: treesize reduction 270, result has 12.3 percent of original size [2021-11-23 02:14:59,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 533 treesize of output 456 [2021-11-23 02:14:59,653 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 02:14:59,659 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 02:14:59,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:59,691 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 21 treesize of output 20 [2021-11-23 02:14:59,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:59,703 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 21 treesize of output 20 [2021-11-23 02:14:59,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:59,847 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:14:59,848 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 21 [2021-11-23 02:15:00,050 INFO L354 Elim1Store]: treesize reduction 202, result has 14.8 percent of original size [2021-11-23 02:15:00,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 470 treesize of output 455 [2021-11-23 02:15:00,126 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:04,144 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5690#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| 0)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 02:15:04,144 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:04,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:15:04,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 22 [2021-11-23 02:15:04,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238983730] [2021-11-23 02:15:04,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:04,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 02:15:04,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 02:15:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1350, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:15:04,145 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand has 23 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:04,550 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2021-11-23 02:15:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:15:04,551 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 02:15:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:04,552 INFO L225 Difference]: With dead ends: 125 [2021-11-23 02:15:04,552 INFO L226 Difference]: Without dead ends: 125 [2021-11-23 02:15:04,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=327, Invalid=1929, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 02:15:04,553 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 266 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:04,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 420 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 286 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2021-11-23 02:15:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-23 02:15:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2021-11-23 02:15:04,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 104 states have (on average 1.2788461538461537) internal successors, (133), 121 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2021-11-23 02:15:04,569 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 25 [2021-11-23 02:15:04,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:04,569 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2021-11-23 02:15:04,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:04,569 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2021-11-23 02:15:04,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:15:04,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:04,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:04,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:04,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:04,797 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:15:04,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:04,798 INFO L85 PathProgramCache]: Analyzing trace with hash -863874504, now seen corresponding path program 1 times [2021-11-23 02:15:04,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:04,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281267411] [2021-11-23 02:15:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:04,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:04,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:04,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281267411] [2021-11-23 02:15:04,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281267411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:04,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633849335] [2021-11-23 02:15:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:04,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:04,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:04,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:04,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:15:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:05,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 02:15:05,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:05,034 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 02:15:05,069 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 02:15:05,069 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 02:15:05,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:15:05,125 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 02:15:05,125 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 1 case distinctions, treesize of input 52 treesize of output 51 [2021-11-23 02:15:05,225 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 02:15:05,225 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-11-23 02:15:05,320 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-11-23 02:15:05,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 61 [2021-11-23 02:15:06,147 INFO L354 Elim1Store]: treesize reduction 106, result has 15.2 percent of original size [2021-11-23 02:15:06,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 50 [2021-11-23 02:15:06,281 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:15:06,281 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 02:15:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:06,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:07,000 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 02:15:07,859 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 02:15:07,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:07,890 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 100 treesize of output 104 [2021-11-23 02:15:28,006 INFO L354 Elim1Store]: treesize reduction 166, result has 30.5 percent of original size [2021-11-23 02:15:28,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 108 [2021-11-23 02:15:28,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:28,035 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 108 treesize of output 124 [2021-11-23 02:15:28,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:28,050 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 124 treesize of output 140 [2021-11-23 02:15:28,174 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 4 [2021-11-23 02:15:28,229 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 6 treesize of output 4 [2021-11-23 02:15:28,322 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 4 [2021-11-23 02:15:28,356 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:15:28,356 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 15 treesize of output 9 [2021-11-23 02:15:28,486 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 6 treesize of output 4 [2021-11-23 02:15:28,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:28,510 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 19 treesize of output 23 [2021-11-23 02:15:28,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:28,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 169 [2021-11-23 02:15:30,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:30,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 135 [2021-11-23 02:15:30,769 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:15:30,769 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 25 treesize of output 24 [2021-11-23 02:15:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 02:15:30,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633849335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:15:30,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009974653] [2021-11-23 02:15:30,793 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:15:30,793 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:15:30,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:15:30,794 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:15:30,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:15:30,813 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 02:15:30,835 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 02:15:30,842 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 02:15:30,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,861 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 21 treesize of output 20 [2021-11-23 02:15:30,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,870 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 21 treesize of output 20 [2021-11-23 02:15:30,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:15:30,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,922 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 28 treesize of output 30 [2021-11-23 02:15:30,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 02:15:30,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,981 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-11-23 02:15:30,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 84 [2021-11-23 02:15:30,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-11-23 02:15:31,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-11-23 02:15:31,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,084 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 02:15:31,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 369 treesize of output 364 [2021-11-23 02:15:31,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,130 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:15:31,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 365 treesize of output 309 [2021-11-23 02:15:31,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,301 INFO L354 Elim1Store]: treesize reduction 170, result has 17.1 percent of original size [2021-11-23 02:15:31,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 453 treesize of output 379 [2021-11-23 02:15:31,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,379 INFO L354 Elim1Store]: treesize reduction 158, result has 16.4 percent of original size [2021-11-23 02:15:31,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 396 treesize of output 369 [2021-11-23 02:15:31,539 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 02:15:31,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 393 treesize of output 381 [2021-11-23 02:15:31,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,710 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:15:31,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 369 treesize of output 313 [2021-11-23 02:15:31,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,752 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 02:15:31,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 365 treesize of output 360 [2021-11-23 02:15:31,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,920 INFO L354 Elim1Store]: treesize reduction 170, result has 17.1 percent of original size [2021-11-23 02:15:31,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 453 treesize of output 379 [2021-11-23 02:15:31,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:31,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:31,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:32,009 INFO L354 Elim1Store]: treesize reduction 158, result has 16.4 percent of original size [2021-11-23 02:15:32,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 396 treesize of output 369 [2021-11-23 02:15:32,095 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 02:15:32,101 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 02:15:32,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,132 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 21 treesize of output 20 [2021-11-23 02:15:32,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,143 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 21 treesize of output 20 [2021-11-23 02:15:32,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:32,293 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:15:32,294 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 21 [2021-11-23 02:15:32,467 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 02:15:32,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 393 treesize of output 381 [2021-11-23 02:15:32,555 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:36,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6140#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (or (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| 0)) (not (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 02:15:36,841 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:36,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:15:36,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 23 [2021-11-23 02:15:36,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995437148] [2021-11-23 02:15:36,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:36,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 02:15:36,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:36,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 02:15:36,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1380, Unknown=19, NotChecked=154, Total=1722 [2021-11-23 02:15:36,843 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:41,143 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (.cse2 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse1 (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1)) (.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0))) (and (or (and (not (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0)) (not (= 0 .cse0))) (not .cse1)) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_58| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_58| 4)))) (= (select |c_#valid| .cse2) 1) (= .cse0 1) (not (= .cse2 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) .cse1 (= (select |c_#valid| .cse3) 1) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (not (= .cse3 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (<= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 02:15:42,007 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0))) (and (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_58| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_58| 4)))) (= (select |c_#valid| .cse0) 1) (not (= .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= (select |c_#valid| .cse1) 1) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (<= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 02:15:42,691 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (let ((.cse1 (select .cse2 0)) (.cse0 (select (store .cse2 (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_58| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_58| 4)))) (= (select |c_#valid| .cse0) 1) (= (select |c_#valid| .cse1) 1) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse0)) (<= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) is different from false [2021-11-23 02:15:46,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:46,071 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2021-11-23 02:15:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:15:46,074 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 02:15:46,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:46,075 INFO L225 Difference]: With dead ends: 123 [2021-11-23 02:15:46,075 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 02:15:46,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=218, Invalid=1846, Unknown=26, NotChecked=460, Total=2550 [2021-11-23 02:15:46,076 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 32 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:46,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 907 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 350 Invalid, 0 Unknown, 396 Unchecked, 0.2s Time] [2021-11-23 02:15:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 02:15:46,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-23 02:15:46,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 105 states have (on average 1.276190476190476) internal successors, (134), 122 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2021-11-23 02:15:46,088 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 25 [2021-11-23 02:15:46,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:46,088 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2021-11-23 02:15:46,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2021-11-23 02:15:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:15:46,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:46,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:46,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:46,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 02:15:46,312 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:15:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:46,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1316510608, now seen corresponding path program 2 times [2021-11-23 02:15:46,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:46,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033840643] [2021-11-23 02:15:46,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:46,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:46,357 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:46,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033840643] [2021-11-23 02:15:46,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033840643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:15:46,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:15:46,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:15:46,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193408735] [2021-11-23 02:15:46,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:15:46,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:15:46,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:15:46,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:15:46,359 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:46,379 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-11-23 02:15:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:15:46,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 02:15:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:46,380 INFO L225 Difference]: With dead ends: 80 [2021-11-23 02:15:46,380 INFO L226 Difference]: Without dead ends: 80 [2021-11-23 02:15:46,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:15:46,381 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:46,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 84 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:15:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-23 02:15:46,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-23 02:15:46,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 79 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-11-23 02:15:46,387 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 25 [2021-11-23 02:15:46,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:46,387 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-11-23 02:15:46,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:46,387 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-11-23 02:15:46,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:15:46,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:46,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:46,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 02:15:46,390 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:15:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:46,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1974051295, now seen corresponding path program 1 times [2021-11-23 02:15:46,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:46,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072738625] [2021-11-23 02:15:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:46,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:46,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:46,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072738625] [2021-11-23 02:15:46,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072738625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:46,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335097957] [2021-11-23 02:15:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:46,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:46,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:46,725 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:46,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:15:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:46,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 02:15:46,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:46,801 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 02:15:46,855 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:15:46,857 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 02:15:46,939 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 02:15:46,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 02:15:46,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 02:15:47,015 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 02:15:47,016 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 02:15:47,081 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 02:15:47,081 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2021-11-23 02:15:47,177 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 02:15:47,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 60 [2021-11-23 02:15:47,306 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 02:15:47,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 36 [2021-11-23 02:15:47,334 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:15:47,334 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 02:15:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:47,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:50,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:50,264 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 91 treesize of output 95 [2021-11-23 02:15:51,952 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (= (select (store (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 02:15:51,993 INFO L354 Elim1Store]: treesize reduction 93, result has 22.5 percent of original size [2021-11-23 02:15:51,994 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 39 [2021-11-23 02:15:52,001 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:15:52,001 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 35 treesize of output 29 [2021-11-23 02:15:52,004 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 40 treesize of output 36 [2021-11-23 02:15:52,006 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 32 treesize of output 28 [2021-11-23 02:15:52,046 INFO L354 Elim1Store]: treesize reduction 93, result has 22.5 percent of original size [2021-11-23 02:15:52,046 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 40 [2021-11-23 02:15:52,068 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-23 02:15:52,070 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 40 treesize of output 44 [2021-11-23 02:15:52,085 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 26 treesize of output 22 [2021-11-23 02:15:52,125 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-11-23 02:15:52,125 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 50 treesize of output 58 [2021-11-23 02:15:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 02:15:52,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335097957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:15:52,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [755987140] [2021-11-23 02:15:52,461 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-23 02:15:52,462 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:15:52,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:15:52,462 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:15:52,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:15:52,474 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 02:15:52,489 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 02:15:52,495 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 02:15:52,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,524 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 21 treesize of output 20 [2021-11-23 02:15:52,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,535 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 21 treesize of output 20 [2021-11-23 02:15:52,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:15:52,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,589 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 28 treesize of output 30 [2021-11-23 02:15:52,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,603 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 28 treesize of output 30 [2021-11-23 02:15:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,646 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-11-23 02:15:52,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 84 [2021-11-23 02:15:52,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2021-11-23 02:15:52,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2021-11-23 02:15:52,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:52,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:52,783 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:15:52,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 308 treesize of output 303 [2021-11-23 02:15:52,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:52,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:52,827 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:15:52,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 304 treesize of output 299 [2021-11-23 02:15:52,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:52,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:52,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:52,995 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-23 02:15:52,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 428 treesize of output 369 [2021-11-23 02:15:53,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:53,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:53,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:53,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:53,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:53,088 INFO L354 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2021-11-23 02:15:53,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 425 treesize of output 398 [2021-11-23 02:15:53,207 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-23 02:15:53,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 386 treesize of output 382 [2021-11-23 02:15:53,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:53,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:53,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:53,349 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:15:53,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 308 treesize of output 303 [2021-11-23 02:15:53,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:53,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:53,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:53,379 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:15:53,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 304 treesize of output 299 [2021-11-23 02:15:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:53,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:53,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:53,526 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-23 02:15:53,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 428 treesize of output 369 [2021-11-23 02:15:53,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:53,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:53,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:53,582 INFO L354 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2021-11-23 02:15:53,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 425 treesize of output 398 [2021-11-23 02:15:53,665 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 02:15:53,675 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 02:15:53,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:53,706 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 21 treesize of output 20 [2021-11-23 02:15:53,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:53,725 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 21 treesize of output 20 [2021-11-23 02:15:53,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:53,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:53,869 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:15:53,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 28 [2021-11-23 02:15:54,044 INFO L354 Elim1Store]: treesize reduction 88, result has 17.0 percent of original size [2021-11-23 02:15:54,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 386 treesize of output 380 [2021-11-23 02:15:54,125 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:59,060 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6776#(and (or (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| |#StackHeapBarrier|) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| 0)) (not (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= 0 (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 02:15:59,060 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:59,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:15:59,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 35 [2021-11-23 02:15:59,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189140734] [2021-11-23 02:15:59,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:59,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 02:15:59,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:59,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 02:15:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2666, Unknown=4, NotChecked=106, Total=3080 [2021-11-23 02:15:59,063 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:00,379 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2021-11-23 02:16:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:16:00,380 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 02:16:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:00,381 INFO L225 Difference]: With dead ends: 79 [2021-11-23 02:16:00,381 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 02:16:00,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=381, Invalid=3525, Unknown=4, NotChecked=122, Total=4032 [2021-11-23 02:16:00,383 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 41 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:00,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 648 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 251 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2021-11-23 02:16:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 02:16:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-23 02:16:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 78 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-11-23 02:16:00,387 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 26 [2021-11-23 02:16:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:00,387 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-11-23 02:16:00,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:00,387 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-11-23 02:16:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:16:00,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:00,388 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:00,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 02:16:00,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-23 02:16:00,601 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:16:00,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:00,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1973620319, now seen corresponding path program 1 times [2021-11-23 02:16:00,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:00,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140153013] [2021-11-23 02:16:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:00,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:00,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:00,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140153013] [2021-11-23 02:16:00,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140153013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:00,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606522598] [2021-11-23 02:16:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:00,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:00,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:00,770 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:00,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:16:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:00,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 02:16:00,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:00,837 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 02:16:00,866 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:16:00,866 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 12 treesize of output 14 [2021-11-23 02:16:00,912 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:16:00,912 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 11 treesize of output 11 [2021-11-23 02:16:00,959 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 16 treesize of output 12 [2021-11-23 02:16:00,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:16:00,978 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 18 treesize of output 18 [2021-11-23 02:16:01,071 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:16:01,072 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 21 treesize of output 27 [2021-11-23 02:16:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:01,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:01,329 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 29 treesize of output 25 [2021-11-23 02:16:01,352 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 13 treesize of output 11 [2021-11-23 02:16:01,353 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 24 treesize of output 22 [2021-11-23 02:16:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:01,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606522598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:01,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1726120110] [2021-11-23 02:16:01,446 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-23 02:16:01,446 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:01,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:01,447 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:01,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:01,461 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 02:16:01,475 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 02:16:01,484 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 02:16:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,506 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 21 treesize of output 20 [2021-11-23 02:16:01,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,514 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 21 treesize of output 20 [2021-11-23 02:16:01,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:16:01,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,557 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 28 treesize of output 30 [2021-11-23 02:16:01,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,566 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 28 treesize of output 30 [2021-11-23 02:16:01,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,596 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-23 02:16:01,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 84 [2021-11-23 02:16:01,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2021-11-23 02:16:01,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-23 02:16:01,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:01,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:01,721 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:16:01,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 369 treesize of output 313 [2021-11-23 02:16:01,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:01,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:01,753 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 02:16:01,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 365 treesize of output 360 [2021-11-23 02:16:01,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:01,884 INFO L354 Elim1Store]: treesize reduction 216, result has 15.3 percent of original size [2021-11-23 02:16:01,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 465 treesize of output 391 [2021-11-23 02:16:01,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:01,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:01,947 INFO L354 Elim1Store]: treesize reduction 180, result has 14.7 percent of original size [2021-11-23 02:16:01,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 408 treesize of output 372 [2021-11-23 02:16:02,099 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 02:16:02,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 405 treesize of output 393 [2021-11-23 02:16:02,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:02,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:02,232 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 02:16:02,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 369 treesize of output 364 [2021-11-23 02:16:02,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:02,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:02,262 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:16:02,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 365 treesize of output 309 [2021-11-23 02:16:02,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:02,430 INFO L354 Elim1Store]: treesize reduction 216, result has 15.3 percent of original size [2021-11-23 02:16:02,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 465 treesize of output 391 [2021-11-23 02:16:02,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:02,533 INFO L354 Elim1Store]: treesize reduction 180, result has 14.7 percent of original size [2021-11-23 02:16:02,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 408 treesize of output 372 [2021-11-23 02:16:02,616 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 02:16:02,624 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 02:16:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 02:16:02,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,665 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 21 treesize of output 20 [2021-11-23 02:16:02,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:02,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:02,815 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:16:02,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 28 [2021-11-23 02:16:02,978 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 02:16:02,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 405 treesize of output 393 [2021-11-23 02:16:03,046 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:07,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7144#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= 0 (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (<= 0 |#NULL.offset|) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| 0)) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 02:16:07,377 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:07,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:07,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2021-11-23 02:16:07,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911871250] [2021-11-23 02:16:07,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:07,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 02:16:07,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:07,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 02:16:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 02:16:07,380 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 24 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:07,868 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2021-11-23 02:16:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:16:07,869 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 02:16:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:07,869 INFO L225 Difference]: With dead ends: 81 [2021-11-23 02:16:07,869 INFO L226 Difference]: Without dead ends: 81 [2021-11-23 02:16:07,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=339, Invalid=2013, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 02:16:07,871 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 374 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:07,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 353 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 397 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2021-11-23 02:16:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-23 02:16:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-11-23 02:16:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-11-23 02:16:07,874 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 26 [2021-11-23 02:16:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:07,875 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-11-23 02:16:07,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:07,875 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-11-23 02:16:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:16:07,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:07,875 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:07,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:08,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:08,076 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:16:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:08,077 INFO L85 PathProgramCache]: Analyzing trace with hash -317804833, now seen corresponding path program 1 times [2021-11-23 02:16:08,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:08,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900672798] [2021-11-23 02:16:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:08,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:08,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:08,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900672798] [2021-11-23 02:16:08,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900672798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:08,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13286454] [2021-11-23 02:16:08,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:08,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:08,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:08,370 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:08,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:16:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:08,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 02:16:08,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:08,421 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 02:16:08,487 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:16:08,488 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 02:16:08,579 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 02:16:08,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 02:16:08,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 02:16:08,677 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 02:16:08,678 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-23 02:16:08,762 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 02:16:08,763 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2021-11-23 02:16:08,862 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 02:16:08,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 60 [2021-11-23 02:16:09,017 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 02:16:09,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 36 [2021-11-23 02:16:09,047 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:16:09,047 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 02:16:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:09,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:09,156 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 6 treesize of output 4 [2021-11-23 02:16:09,791 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))) is different from false [2021-11-23 02:16:10,644 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (= (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) is different from false [2021-11-23 02:16:10,678 INFO L354 Elim1Store]: treesize reduction 83, result has 30.8 percent of original size [2021-11-23 02:16:10,678 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 50 [2021-11-23 02:16:10,693 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-23 02:16:10,693 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 50 treesize of output 58 [2021-11-23 02:16:10,723 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 4 [2021-11-23 02:16:10,769 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:16:10,769 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 15 treesize of output 9 [2021-11-23 02:16:10,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:16:10,815 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 58 treesize of output 76 [2021-11-23 02:16:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 02:16:11,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13286454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:11,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235013062] [2021-11-23 02:16:11,106 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-23 02:16:11,106 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:11,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:11,107 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:11,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:11,126 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 02:16:11,143 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 02:16:11,150 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 02:16:11,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,180 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 21 treesize of output 20 [2021-11-23 02:16:11,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,189 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 21 treesize of output 20 [2021-11-23 02:16:11,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:16:11,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,243 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 28 treesize of output 30 [2021-11-23 02:16:11,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,254 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 28 treesize of output 30 [2021-11-23 02:16:11,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,286 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-11-23 02:16:11,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 84 [2021-11-23 02:16:11,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-11-23 02:16:11,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-11-23 02:16:11,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:11,409 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 02:16:11,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 353 treesize of output 348 [2021-11-23 02:16:11,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:11,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,444 INFO L354 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2021-11-23 02:16:11,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 349 treesize of output 323 [2021-11-23 02:16:11,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:11,565 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 02:16:11,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 472 treesize of output 428 [2021-11-23 02:16:11,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:11,634 INFO L354 Elim1Store]: treesize reduction 220, result has 15.7 percent of original size [2021-11-23 02:16:11,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 464 treesize of output 405 [2021-11-23 02:16:11,741 INFO L354 Elim1Store]: treesize reduction 88, result has 17.0 percent of original size [2021-11-23 02:16:11,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 435 treesize of output 419 [2021-11-23 02:16:11,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:11,895 INFO L354 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2021-11-23 02:16:11,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 353 treesize of output 327 [2021-11-23 02:16:11,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:11,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:11,957 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 02:16:11,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 349 treesize of output 344 [2021-11-23 02:16:12,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:12,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:12,129 INFO L354 Elim1Store]: treesize reduction 220, result has 15.7 percent of original size [2021-11-23 02:16:12,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 472 treesize of output 409 [2021-11-23 02:16:12,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:12,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:12,193 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 02:16:12,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 469 treesize of output 425 [2021-11-23 02:16:12,265 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 02:16:12,274 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 02:16:12,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:12,313 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 21 treesize of output 20 [2021-11-23 02:16:12,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:12,329 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 21 treesize of output 20 [2021-11-23 02:16:12,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:12,510 INFO L354 Elim1Store]: treesize reduction 28, result has 55.6 percent of original size [2021-11-23 02:16:12,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 31 treesize of output 53 [2021-11-23 02:16:12,679 INFO L354 Elim1Store]: treesize reduction 88, result has 17.0 percent of original size [2021-11-23 02:16:12,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 435 treesize of output 419 [2021-11-23 02:16:12,743 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:17,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7521#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| 0)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (or (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1)) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 02:16:17,903 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:17,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:17,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2021-11-23 02:16:17,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574789275] [2021-11-23 02:16:17,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:17,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 02:16:17,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:17,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 02:16:17,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=2349, Unknown=2, NotChecked=202, Total=2862 [2021-11-23 02:16:17,905 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:21,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:21,348 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2021-11-23 02:16:21,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:16:21,348 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 02:16:21,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:21,349 INFO L225 Difference]: With dead ends: 77 [2021-11-23 02:16:21,349 INFO L226 Difference]: Without dead ends: 77 [2021-11-23 02:16:21,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=385, Invalid=3161, Unknown=2, NotChecked=234, Total=3782 [2021-11-23 02:16:21,351 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 45 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:21,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 523 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 155 Invalid, 0 Unknown, 144 Unchecked, 0.1s Time] [2021-11-23 02:16:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-23 02:16:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-23 02:16:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.173913043478261) internal successors, (81), 76 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-11-23 02:16:21,354 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 26 [2021-11-23 02:16:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:21,354 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-11-23 02:16:21,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-11-23 02:16:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:16:21,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:21,355 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:21,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:21,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:21,556 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:16:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash -318235809, now seen corresponding path program 1 times [2021-11-23 02:16:21,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:21,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706888395] [2021-11-23 02:16:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:21,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:21,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706888395] [2021-11-23 02:16:21,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706888395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539202281] [2021-11-23 02:16:21,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:21,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:21,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:21,745 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:21,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:16:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:21,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 02:16:21,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:21,813 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 02:16:21,844 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:16:21,845 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 12 treesize of output 14 [2021-11-23 02:16:21,896 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 02:16:21,896 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 02:16:21,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:16:21,964 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 02:16:21,965 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-11-23 02:16:22,032 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 02:16:22,033 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 34 [2021-11-23 02:16:22,137 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-11-23 02:16:22,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 56 [2021-11-23 02:16:22,316 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-11-23 02:16:22,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 48 [2021-11-23 02:16:22,422 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:16:22,422 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 21 treesize of output 27 [2021-11-23 02:16:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:22,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:22,692 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 27 treesize of output 23 [2021-11-23 02:16:23,443 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)))) is different from false [2021-11-23 02:17:04,620 INFO L354 Elim1Store]: treesize reduction 83, result has 30.8 percent of original size [2021-11-23 02:17:04,621 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 59 [2021-11-23 02:17:04,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:04,646 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 59 treesize of output 75 [2021-11-23 02:17:04,710 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 4 [2021-11-23 02:17:04,773 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:17:04,774 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 15 treesize of output 9 [2021-11-23 02:17:04,825 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 6 treesize of output 4 [2021-11-23 02:17:04,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:04,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 117 [2021-11-23 02:17:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:17:05,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539202281] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:05,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [469502547] [2021-11-23 02:17:05,232 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-23 02:17:05,232 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:17:05,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:17:05,233 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:17:05,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:17:05,252 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 02:17:05,274 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 02:17:05,281 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 02:17:05,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,299 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 21 treesize of output 20 [2021-11-23 02:17:05,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,310 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 21 treesize of output 20 [2021-11-23 02:17:05,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:17:05,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,368 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 28 treesize of output 30 [2021-11-23 02:17:05,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,380 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 28 treesize of output 30 [2021-11-23 02:17:05,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,413 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-23 02:17:05,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 84 [2021-11-23 02:17:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2021-11-23 02:17:05,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-11-23 02:17:05,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:05,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:05,541 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 02:17:05,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 369 treesize of output 364 [2021-11-23 02:17:05,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:05,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:05,570 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:17:05,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 365 treesize of output 309 [2021-11-23 02:17:05,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:05,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:05,693 INFO L354 Elim1Store]: treesize reduction 170, result has 17.1 percent of original size [2021-11-23 02:17:05,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 453 treesize of output 379 [2021-11-23 02:17:05,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:05,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:05,756 INFO L354 Elim1Store]: treesize reduction 158, result has 16.4 percent of original size [2021-11-23 02:17:05,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 396 treesize of output 369 [2021-11-23 02:17:05,873 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 02:17:05,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 393 treesize of output 381 [2021-11-23 02:17:05,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:05,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:05,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:06,008 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:17:06,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 369 treesize of output 313 [2021-11-23 02:17:06,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:06,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:06,056 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 02:17:06,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 365 treesize of output 360 [2021-11-23 02:17:06,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:06,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:06,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:06,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:06,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:06,198 INFO L354 Elim1Store]: treesize reduction 170, result has 17.1 percent of original size [2021-11-23 02:17:06,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 453 treesize of output 379 [2021-11-23 02:17:06,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:06,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:06,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:06,267 INFO L354 Elim1Store]: treesize reduction 158, result has 16.4 percent of original size [2021-11-23 02:17:06,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 396 treesize of output 369 [2021-11-23 02:17:06,333 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 02:17:06,341 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 02:17:06,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:06,366 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 21 treesize of output 20 [2021-11-23 02:17:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:06,378 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 21 treesize of output 20 [2021-11-23 02:17:06,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:06,532 INFO L354 Elim1Store]: treesize reduction 28, result has 55.6 percent of original size [2021-11-23 02:17:06,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 31 treesize of output 53 [2021-11-23 02:17:06,708 INFO L354 Elim1Store]: treesize reduction 88, result has 17.0 percent of original size [2021-11-23 02:17:06,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 393 treesize of output 385 [2021-11-23 02:17:06,784 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:17:12,194 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7894#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (or (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| 0)) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 02:17:12,194 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:17:12,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:17:12,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2021-11-23 02:17:12,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882621599] [2021-11-23 02:17:12,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:17:12,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 02:17:12,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:12,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 02:17:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2158, Unknown=33, NotChecked=96, Total=2550 [2021-11-23 02:17:12,196 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:17:13,121 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (and (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)))) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_85| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_85| 4)))) (not (= (select .cse0 0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store .cse0 (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (<= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 02:17:14,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:14,790 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-11-23 02:17:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 02:17:14,791 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 02:17:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:14,792 INFO L225 Difference]: With dead ends: 76 [2021-11-23 02:17:14,792 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 02:17:14,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=369, Invalid=3144, Unknown=35, NotChecked=234, Total=3782 [2021-11-23 02:17:14,794 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 52 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:14,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 731 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 250 Invalid, 0 Unknown, 207 Unchecked, 0.2s Time] [2021-11-23 02:17:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 02:17:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-23 02:17:14,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:17:14,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-11-23 02:17:14,797 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 26 [2021-11-23 02:17:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:14,798 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-11-23 02:17:14,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:17:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-11-23 02:17:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:17:14,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:14,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:14,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:14,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 02:17:14,999 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:17:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:14,999 INFO L85 PathProgramCache]: Analyzing trace with hash -286879734, now seen corresponding path program 1 times [2021-11-23 02:17:15,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:15,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93993362] [2021-11-23 02:17:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:15,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:17:15,342 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:15,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93993362] [2021-11-23 02:17:15,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93993362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:15,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158997445] [2021-11-23 02:17:15,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:15,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:15,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:15,344 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:15,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:17:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:15,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 02:17:15,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:15,409 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 02:17:15,464 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:17:15,464 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 02:17:15,548 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 02:17:15,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 02:17:15,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 02:17:15,664 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 02:17:15,664 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 02:17:15,758 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 02:17:15,759 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2021-11-23 02:17:15,868 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 02:17:15,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 60 [2021-11-23 02:17:16,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:16,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:16,089 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-11-23 02:17:16,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 60 [2021-11-23 02:17:16,468 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:17:16,468 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 1 case distinctions, treesize of input 20 treesize of output 22 [2021-11-23 02:17:16,580 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:17:16,581 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 25 treesize of output 30 [2021-11-23 02:17:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:17:16,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:17,790 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (let ((.cse0 (select .cse1 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (and (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) .cse0) 1) (not (= .cse0 (select .cse1 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))))))) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 02:17:19,092 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1)) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)))))))) is different from false [2021-11-23 02:17:19,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:19,146 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 177 treesize of output 181 [2021-11-23 02:17:21,232 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)))) (forall ((v_prenex_7 Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (let ((.cse1 (store (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) v_prenex_7 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse1 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (select .cse1 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)))) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 02:17:21,426 INFO L354 Elim1Store]: treesize reduction 249, result has 30.4 percent of original size [2021-11-23 02:17:21,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 297 treesize of output 165 [2021-11-23 02:17:21,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:21,453 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 165 treesize of output 181 [2021-11-23 02:17:21,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:21,470 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 181 treesize of output 195 [2021-11-23 02:17:21,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:21,487 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 195 treesize of output 211 [2021-11-23 02:17:21,641 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 6 treesize of output 4 [2021-11-23 02:17:21,718 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 6 treesize of output 4 [2021-11-23 02:17:21,789 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 6 treesize of output 4 [2021-11-23 02:17:21,874 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:17:21,874 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 15 treesize of output 9 [2021-11-23 02:17:21,959 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 4 [2021-11-23 02:17:22,114 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 4 [2021-11-23 02:17:22,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:22,160 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 19 treesize of output 23 [2021-11-23 02:17:22,315 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 4 [2021-11-23 02:17:22,413 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:17:22,414 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 15 treesize of output 9 [2021-11-23 02:17:22,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:22,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 147 [2021-11-23 02:17:22,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:22,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 206 [2021-11-23 02:17:23,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:23,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:17:23,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 160 treesize of output 338 [2021-11-23 02:17:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 02:17:31,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158997445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76720135] [2021-11-23 02:17:31,551 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-23 02:17:31,552 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:17:31,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:17:31,552 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:17:31,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:17:31,565 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 02:17:31,580 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 02:17:31,586 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 02:17:31,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,601 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 21 treesize of output 20 [2021-11-23 02:17:31,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,609 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 21 treesize of output 20 [2021-11-23 02:17:31,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:17:31,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,656 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 28 treesize of output 30 [2021-11-23 02:17:31,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,665 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 28 treesize of output 30 [2021-11-23 02:17:31,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 02:17:31,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 02:17:31,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2021-11-23 02:17:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:31,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:31,798 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:17:31,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 310 [2021-11-23 02:17:31,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:31,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:31,827 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:17:31,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 311 treesize of output 306 [2021-11-23 02:17:31,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:31,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:31,951 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-23 02:17:31,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 435 treesize of output 376 [2021-11-23 02:17:31,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:31,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:31,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:32,011 INFO L354 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2021-11-23 02:17:32,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 432 treesize of output 405 [2021-11-23 02:17:32,113 INFO L354 Elim1Store]: treesize reduction 88, result has 17.0 percent of original size [2021-11-23 02:17:32,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 393 treesize of output 385 [2021-11-23 02:17:32,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:32,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:32,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:32,248 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:17:32,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 310 [2021-11-23 02:17:32,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:32,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:32,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:32,277 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:17:32,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 311 treesize of output 306 [2021-11-23 02:17:32,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:32,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:32,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:32,396 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-23 02:17:32,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 435 treesize of output 376 [2021-11-23 02:17:32,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:32,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:32,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:32,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:32,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:32,453 INFO L354 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2021-11-23 02:17:32,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 432 treesize of output 405 [2021-11-23 02:17:32,522 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 02:17:32,530 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 02:17:32,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:32,557 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 21 treesize of output 20 [2021-11-23 02:17:32,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:32,566 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 21 treesize of output 20 [2021-11-23 02:17:32,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:32,691 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:17:32,691 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 21 [2021-11-23 02:17:32,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:17:32,814 INFO L354 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2021-11-23 02:17:32,814 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-23 02:17:32,950 INFO L354 Elim1Store]: treesize reduction 88, result has 17.0 percent of original size [2021-11-23 02:17:32,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 393 treesize of output 385 [2021-11-23 02:17:33,015 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:17:38,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8296#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| 0)) (not (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= 0 (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)))' at error location [2021-11-23 02:17:38,470 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:17:38,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:17:38,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 40 [2021-11-23 02:17:38,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381858693] [2021-11-23 02:17:38,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:17:38,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 02:17:38,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:38,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 02:17:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=3114, Unknown=3, NotChecked=348, Total=3782 [2021-11-23 02:17:38,473 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 42 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:06,418 WARN L227 SmtUtils]: Spent 27.77s on a formula simplification. DAG size of input: 71 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:18:07,698 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1)) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)))))))) (forall ((|v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_68| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_68|) 0)) (and (not (= |v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_68| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_68| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (= (select |c_#valid| .cse1) 1) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= (select |c_#valid| .cse2) 1) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse2)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse2)) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_92| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_92| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 02:18:08,628 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1)) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)))))))) (= (select |c_#valid| .cse1) 1) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= (select |c_#valid| .cse2) 1) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse2)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse2)) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_92| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_92| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 02:18:09,324 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (let ((.cse1 (select .cse4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse0 (select (store .cse4 (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= (select |c_#valid| .cse0) 1) (= (select |c_#valid| .cse1) 1) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (let ((.cse3 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (let ((.cse2 (select .cse3 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (and (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) .cse2) 1) (not (= .cse2 (select .cse3 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))))))) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse0)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse1)) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_92| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_92| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse0)) (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) is different from false [2021-11-23 02:18:09,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:09,617 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2021-11-23 02:18:09,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:18:09,618 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-23 02:18:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:09,618 INFO L225 Difference]: With dead ends: 75 [2021-11-23 02:18:09,618 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 02:18:09,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 41.6s TimeCoverageRelationStatistics Valid=382, Invalid=3926, Unknown=6, NotChecked=798, Total=5112 [2021-11-23 02:18:09,620 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 51 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:09,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 620 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 169 Invalid, 0 Unknown, 279 Unchecked, 0.1s Time] [2021-11-23 02:18:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 02:18:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-23 02:18:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.144927536231884) internal successors, (79), 74 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-11-23 02:18:09,623 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 28 [2021-11-23 02:18:09,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:09,623 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-11-23 02:18:09,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:09,624 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-11-23 02:18:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:18:09,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:09,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:09,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:09,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 02:18:09,833 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:18:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash -241197764, now seen corresponding path program 1 times [2021-11-23 02:18:09,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:09,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501943798] [2021-11-23 02:18:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:09,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:10,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:10,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501943798] [2021-11-23 02:18:10,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501943798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:18:10,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165281121] [2021-11-23 02:18:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:10,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:10,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:10,173 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:10,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:18:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:10,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 02:18:10,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:10,227 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 02:18:10,278 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:18:10,278 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 02:18:10,363 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 02:18:10,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 02:18:10,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 02:18:10,466 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 02:18:10,466 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-23 02:18:10,534 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 02:18:10,535 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2021-11-23 02:18:10,607 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 02:18:10,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 60 [2021-11-23 02:18:10,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:10,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:10,768 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-11-23 02:18:10,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 60 [2021-11-23 02:18:11,015 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:18:11,015 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 1 case distinctions, treesize of input 20 treesize of output 22 [2021-11-23 02:18:11,099 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:18:11,099 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 25 treesize of output 30 [2021-11-23 02:18:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:11,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:12,154 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (let ((.cse1 (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))) (and (not (= (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) .cse1)) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) .cse1) 1)))) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 02:18:12,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:12,167 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 101 treesize of output 105 [2021-11-23 02:18:13,055 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) is different from false [2021-11-23 02:18:15,155 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (let ((.cse0 (store (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (store (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (select (store (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))))))) is different from false [2021-11-23 02:18:15,301 INFO L354 Elim1Store]: treesize reduction 249, result has 30.4 percent of original size [2021-11-23 02:18:15,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 169 [2021-11-23 02:18:15,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:15,316 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 169 treesize of output 185 [2021-11-23 02:18:15,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:15,333 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 185 treesize of output 199 [2021-11-23 02:18:15,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:15,350 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 199 treesize of output 215 [2021-11-23 02:18:15,513 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 6 treesize of output 4 [2021-11-23 02:18:15,566 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 6 treesize of output 4 [2021-11-23 02:18:15,646 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 6 treesize of output 4 [2021-11-23 02:18:15,740 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 8 treesize of output 4 [2021-11-23 02:18:15,810 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:18:15,810 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 15 treesize of output 9 [2021-11-23 02:18:15,928 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 4 [2021-11-23 02:18:15,965 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:18:15,965 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 15 treesize of output 9 [2021-11-23 02:18:16,083 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 4 [2021-11-23 02:18:16,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:16,122 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 19 treesize of output 23 [2021-11-23 02:18:16,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:16,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:16,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 145 treesize of output 209 [2021-11-23 02:18:19,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:19,527 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 51 treesize of output 69 [2021-11-23 02:18:19,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:19,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 154 [2021-11-23 02:18:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 02:18:20,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165281121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:20,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1799423641] [2021-11-23 02:18:20,459 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-23 02:18:20,459 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:18:20,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:18:20,460 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:18:20,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:18:20,475 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 02:18:20,486 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 02:18:20,490 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 02:18:20,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,506 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 21 treesize of output 20 [2021-11-23 02:18:20,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,514 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 21 treesize of output 20 [2021-11-23 02:18:20,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:18:20,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,565 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 28 treesize of output 30 [2021-11-23 02:18:20,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,578 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 28 treesize of output 30 [2021-11-23 02:18:20,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,614 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-23 02:18:20,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 84 [2021-11-23 02:18:20,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2021-11-23 02:18:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-23 02:18:20,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:20,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:20,724 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:18:20,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 375 treesize of output 313 [2021-11-23 02:18:20,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:20,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:20,755 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 02:18:20,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 371 treesize of output 366 [2021-11-23 02:18:20,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:20,879 INFO L354 Elim1Store]: treesize reduction 216, result has 14.6 percent of original size [2021-11-23 02:18:20,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 475 treesize of output 435 [2021-11-23 02:18:20,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:20,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:20,955 INFO L354 Elim1Store]: treesize reduction 216, result has 15.3 percent of original size [2021-11-23 02:18:20,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 467 treesize of output 391 [2021-11-23 02:18:21,070 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-23 02:18:21,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 398 treesize of output 394 [2021-11-23 02:18:21,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:21,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:21,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:21,199 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 02:18:21,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 375 treesize of output 370 [2021-11-23 02:18:21,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:21,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:21,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:21,229 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 02:18:21,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 371 treesize of output 309 [2021-11-23 02:18:21,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:21,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:21,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:21,369 INFO L354 Elim1Store]: treesize reduction 216, result has 15.3 percent of original size [2021-11-23 02:18:21,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 475 treesize of output 395 [2021-11-23 02:18:21,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:21,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:21,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:21,436 INFO L354 Elim1Store]: treesize reduction 180, result has 14.7 percent of original size [2021-11-23 02:18:21,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 412 treesize of output 372 [2021-11-23 02:18:21,519 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 02:18:21,524 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 02:18:21,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:21,549 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 21 treesize of output 20 [2021-11-23 02:18:21,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:21,559 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 21 treesize of output 20 [2021-11-23 02:18:21,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:21,677 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:18:21,677 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 21 [2021-11-23 02:18:21,807 INFO L354 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-11-23 02:18:21,807 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 5 case distinctions, treesize of input 30 treesize of output 53 [2021-11-23 02:18:21,981 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 02:18:21,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 398 treesize of output 388 [2021-11-23 02:18:22,054 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:18:28,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8695#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|)) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| |#StackHeapBarrier|) (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| 0)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 02:18:28,083 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:18:28,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:18:28,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2021-11-23 02:18:28,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178326536] [2021-11-23 02:18:28,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:28,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 02:18:28,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 02:18:28,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=3216, Unknown=3, NotChecked=354, Total=3906 [2021-11-23 02:18:28,085 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 43 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:29,237 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (forall ((|v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_73| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_73|) 0)) (and (not (= |v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_73| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_99| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_99| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse1)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 02:18:30,125 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_99| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_99| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse1)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 02:18:30,845 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (store .cse0 (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_99| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_99| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse1)) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (let ((.cse3 (select .cse2 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))) (and (not (= (select .cse2 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) .cse3)) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) .cse3) 1)))) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) is different from false [2021-11-23 02:18:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:31,090 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-11-23 02:18:31,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:18:31,090 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-23 02:18:31,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:31,091 INFO L225 Difference]: With dead ends: 74 [2021-11-23 02:18:31,091 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 02:18:31,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=401, Invalid=4039, Unknown=6, NotChecked=810, Total=5256 [2021-11-23 02:18:31,093 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 52 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:31,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 814 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 225 Invalid, 0 Unknown, 272 Unchecked, 0.1s Time] [2021-11-23 02:18:31,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 02:18:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-23 02:18:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-11-23 02:18:31,097 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 28 [2021-11-23 02:18:31,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:31,097 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-11-23 02:18:31,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-11-23 02:18:31,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:18:31,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:31,098 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:31,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:31,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 02:18:31,325 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:18:31,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:31,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2024849166, now seen corresponding path program 1 times [2021-11-23 02:18:31,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:31,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79264850] [2021-11-23 02:18:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:31,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:31,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:31,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79264850] [2021-11-23 02:18:31,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79264850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:18:31,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342485382] [2021-11-23 02:18:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:31,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:31,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:31,624 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:31,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:18:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:31,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 02:18:31,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:31,694 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 02:18:31,747 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 02:18:31,747 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 02:18:31,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:18:31,814 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 02:18:31,814 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-11-23 02:18:31,866 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 02:18:31,866 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 34 [2021-11-23 02:18:31,926 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 02:18:31,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 51 [2021-11-23 02:18:32,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:32,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:32,051 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-11-23 02:18:32,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 57 treesize of output 51 [2021-11-23 02:18:32,247 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:18:32,247 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 36 treesize of output 42 [2021-11-23 02:18:32,531 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-11-23 02:18:32,531 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 54 treesize of output 71 [2021-11-23 02:18:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:33,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:33,342 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 37 treesize of output 33 [2021-11-23 02:18:34,091 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (and (not (= (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))))) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 02:18:34,975 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 02:18:37,068 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (select (store (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))))) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 02:18:37,154 INFO L354 Elim1Store]: treesize reduction 166, result has 30.5 percent of original size [2021-11-23 02:18:37,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 108 [2021-11-23 02:18:37,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:37,169 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 108 treesize of output 124 [2021-11-23 02:18:37,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:37,183 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 124 treesize of output 140 [2021-11-23 02:18:37,290 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 4 [2021-11-23 02:18:37,345 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 6 treesize of output 4 [2021-11-23 02:18:37,395 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 6 treesize of output 4 [2021-11-23 02:18:37,426 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:18:37,426 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 15 treesize of output 9 [2021-11-23 02:18:37,461 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 6 treesize of output 4 [2021-11-23 02:18:37,585 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:18:37,585 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 15 treesize of output 9 [2021-11-23 02:18:37,610 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 4 [2021-11-23 02:18:37,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:37,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 138 [2021-11-23 02:18:38,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:18:38,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 138 [2021-11-23 02:18:38,510 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:18:38,510 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 25 treesize of output 24 [2021-11-23 02:18:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 02:18:38,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342485382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:38,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460550110] [2021-11-23 02:18:38,536 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-23 02:18:38,536 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:18:38,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:18:38,537 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:18:38,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:18:38,549 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 02:18:38,565 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 02:18:38,571 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 02:18:38,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,585 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 21 treesize of output 20 [2021-11-23 02:18:38,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,592 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 21 treesize of output 20 [2021-11-23 02:18:38,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:18:38,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,640 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 28 treesize of output 30 [2021-11-23 02:18:38,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,649 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 28 treesize of output 30 [2021-11-23 02:18:38,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,680 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-23 02:18:38,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 84 [2021-11-23 02:18:38,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,692 INFO L354 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2021-11-23 02:18:38,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 84 [2021-11-23 02:18:38,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 02:18:38,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:38,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:38,806 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-23 02:18:38,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 342 treesize of output 346 [2021-11-23 02:18:38,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:38,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:38,838 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 02:18:38,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 338 treesize of output 325 [2021-11-23 02:18:38,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:38,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:38,977 INFO L354 Elim1Store]: treesize reduction 246, result has 13.4 percent of original size [2021-11-23 02:18:38,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 482 treesize of output 450 [2021-11-23 02:18:38,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:38,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:38,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:39,053 INFO L354 Elim1Store]: treesize reduction 218, result has 14.8 percent of original size [2021-11-23 02:18:39,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 466 treesize of output 385 [2021-11-23 02:18:39,176 INFO L354 Elim1Store]: treesize reduction 188, result has 10.0 percent of original size [2021-11-23 02:18:39,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 424 treesize of output 401 [2021-11-23 02:18:39,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:39,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:39,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:39,318 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-23 02:18:39,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 342 treesize of output 346 [2021-11-23 02:18:39,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:39,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:39,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:39,349 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 02:18:39,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 338 treesize of output 325 [2021-11-23 02:18:39,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:39,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:39,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:39,513 INFO L354 Elim1Store]: treesize reduction 218, result has 14.8 percent of original size [2021-11-23 02:18:39,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 482 treesize of output 389 [2021-11-23 02:18:39,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:39,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:39,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:39,599 INFO L354 Elim1Store]: treesize reduction 246, result has 13.4 percent of original size [2021-11-23 02:18:39,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 471 treesize of output 439 [2021-11-23 02:18:39,656 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 02:18:39,665 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 02:18:39,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:39,685 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 21 treesize of output 20 [2021-11-23 02:18:39,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:39,698 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 21 treesize of output 20 [2021-11-23 02:18:39,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:39,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:39,821 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:18:39,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 28 [2021-11-23 02:18:39,924 INFO L354 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-11-23 02:18:39,925 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 5 case distinctions, treesize of input 30 treesize of output 53 [2021-11-23 02:18:40,114 INFO L354 Elim1Store]: treesize reduction 192, result has 8.1 percent of original size [2021-11-23 02:18:40,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 424 treesize of output 397 [2021-11-23 02:18:40,172 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:18:46,512 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9092#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= 0 (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (<= 0 |#NULL.offset|) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| 0)) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 02:18:46,513 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:18:46,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:18:46,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 37 [2021-11-23 02:18:46,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012083655] [2021-11-23 02:18:46,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:46,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-23 02:18:46,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:46,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-23 02:18:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2779, Unknown=3, NotChecked=330, Total=3422 [2021-11-23 02:18:46,515 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 38 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:19:44,574 WARN L227 SmtUtils]: Spent 14.64s on a formula simplification. DAG size of input: 61 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:20:24,073 WARN L227 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 50 DAG size of output: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:20:24,926 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (and (not (= (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))))) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_106| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_106| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) is different from false [2021-11-23 02:20:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:25,287 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-11-23 02:20:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:20:25,287 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-23 02:20:25,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:25,288 INFO L225 Difference]: With dead ends: 72 [2021-11-23 02:20:25,288 INFO L226 Difference]: Without dead ends: 72 [2021-11-23 02:20:25,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 109.1s TimeCoverageRelationStatistics Valid=419, Invalid=3798, Unknown=89, NotChecked=524, Total=4830 [2021-11-23 02:20:25,289 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 91 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:25,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 593 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 373 Invalid, 0 Unknown, 246 Unchecked, 0.2s Time] [2021-11-23 02:20:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-23 02:20:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-23 02:20:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:20:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-11-23 02:20:25,293 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 29 [2021-11-23 02:20:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:25,293 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-11-23 02:20:25,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:20:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-11-23 02:20:25,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:20:25,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:25,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:20:25,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:20:25,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:20:25,509 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:20:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:25,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1979167196, now seen corresponding path program 1 times [2021-11-23 02:20:25,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:20:25,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233245146] [2021-11-23 02:20:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:25,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:20:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:20:25,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:20:25,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233245146] [2021-11-23 02:20:25,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233245146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:20:25,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449720923] [2021-11-23 02:20:25,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:25,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:20:25,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:20:25,910 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:20:25,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 02:20:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:25,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 02:20:25,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:20:25,972 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 02:20:26,020 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:20:26,020 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 02:20:26,099 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 02:20:26,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 02:20:26,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 02:20:26,192 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 02:20:26,192 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 02:20:26,261 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 02:20:26,262 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2021-11-23 02:20:26,336 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 02:20:26,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 60 [2021-11-23 02:20:26,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:26,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:26,490 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-11-23 02:20:26,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 60 [2021-11-23 02:20:26,999 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:20:26,999 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 53 treesize of output 59 [2021-11-23 02:20:28,240 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:20:28,240 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 25 treesize of output 30 [2021-11-23 02:20:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:20:28,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:20:30,844 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (= (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (select (store (store |c_#valid| (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) 0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) 1) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 02:20:32,862 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (= (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (select (store (store |c_#valid| (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) 0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) 1))) is different from false [2021-11-23 02:20:32,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:20:32,903 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 177 treesize of output 181 [2021-11-23 02:20:34,996 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (let ((.cse1 (store (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse1 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (select .cse1 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)))) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 02:20:35,148 INFO L354 Elim1Store]: treesize reduction 249, result has 30.4 percent of original size [2021-11-23 02:20:35,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 297 treesize of output 165 [2021-11-23 02:20:35,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:20:35,165 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 165 treesize of output 181 [2021-11-23 02:20:35,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:20:35,181 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 181 treesize of output 197 [2021-11-23 02:20:35,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:20:35,200 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 197 treesize of output 211 [2021-11-23 02:20:35,370 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 4 [2021-11-23 02:20:35,458 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 4 [2021-11-23 02:20:35,526 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 6 treesize of output 4 [2021-11-23 02:20:35,605 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 6 treesize of output 4 [2021-11-23 02:20:35,630 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:20:35,630 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 15 treesize of output 9 [2021-11-23 02:20:35,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:20:35,760 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 19 treesize of output 23 [2021-11-23 02:20:35,790 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 6 treesize of output 4 [2021-11-23 02:20:35,889 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 4 [2021-11-23 02:20:35,965 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:20:35,965 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 15 treesize of output 9 [2021-11-23 02:20:36,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:20:36,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:20:36,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 143 treesize of output 259 [2021-11-23 02:20:45,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:20:45,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 101 [2021-11-23 02:20:45,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:20:45,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 233 [2021-11-23 02:20:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 02:20:52,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449720923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:20:52,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2011661417] [2021-11-23 02:20:52,625 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-23 02:20:52,626 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:20:52,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:20:52,626 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:20:52,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:20:52,641 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 02:20:52,656 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 02:20:52,662 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 02:20:52,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,673 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 21 treesize of output 20 [2021-11-23 02:20:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,680 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 21 treesize of output 20 [2021-11-23 02:20:52,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:20:52,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,722 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 28 treesize of output 30 [2021-11-23 02:20:52,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,733 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 28 treesize of output 30 [2021-11-23 02:20:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,785 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-11-23 02:20:52,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 84 [2021-11-23 02:20:52,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2021-11-23 02:20:52,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 44 [2021-11-23 02:20:52,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:20:52,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,908 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 02:20:52,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 380 treesize of output 324 [2021-11-23 02:20:52,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:20:52,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,944 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 02:20:52,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 376 treesize of output 356 [2021-11-23 02:20:52,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:52,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:20:53,077 INFO L354 Elim1Store]: treesize reduction 228, result has 15.2 percent of original size [2021-11-23 02:20:53,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 459 treesize of output 385 [2021-11-23 02:20:53,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:53,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:53,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:20:53,143 INFO L354 Elim1Store]: treesize reduction 180, result has 14.7 percent of original size [2021-11-23 02:20:53,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 402 treesize of output 364 [2021-11-23 02:20:53,253 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 02:20:53,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 404 treesize of output 394 [2021-11-23 02:20:53,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:20:53,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:53,386 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 02:20:53,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 380 treesize of output 324 [2021-11-23 02:20:53,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:53,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:20:53,420 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 02:20:53,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 376 treesize of output 356 [2021-11-23 02:20:53,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:53,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:53,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:20:53,558 INFO L354 Elim1Store]: treesize reduction 228, result has 15.2 percent of original size [2021-11-23 02:20:53,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 459 treesize of output 385 [2021-11-23 02:20:53,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:53,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:20:53,629 INFO L354 Elim1Store]: treesize reduction 180, result has 14.7 percent of original size [2021-11-23 02:20:53,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 402 treesize of output 364 [2021-11-23 02:20:53,690 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 02:20:53,696 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 02:20:53,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:53,721 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 21 treesize of output 20 [2021-11-23 02:20:53,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:20:53,732 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 21 treesize of output 20 [2021-11-23 02:20:53,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:20:53,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:20:53,847 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:20:53,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 28 [2021-11-23 02:20:53,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:20:53,971 INFO L354 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2021-11-23 02:20:53,971 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-23 02:20:54,101 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 02:20:54,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 404 treesize of output 394 [2021-11-23 02:20:54,162 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:21:00,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9493#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| 0)) (not (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= 0 (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)))' at error location [2021-11-23 02:21:00,533 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:21:00,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:21:00,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2021-11-23 02:21:00,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890537833] [2021-11-23 02:21:00,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:21:00,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 02:21:00,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:00,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 02:21:00,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=3338, Unknown=3, NotChecked=360, Total=4032 [2021-11-23 02:21:00,535 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:21:31,384 WARN L227 SmtUtils]: Spent 30.57s on a formula simplification. DAG size of input: 65 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:21:32,745 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_83| Int)) (or (and (not (= |v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_83| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_83| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (not (= (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_83|) 0)))) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= (select |c_#valid| .cse0) 1) (not (= .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= (select |c_#valid| .cse1) 1) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_113| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_113| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse1)) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (= (let ((.cse2 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (select (store (store |c_#valid| (select .cse2 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) 0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select .cse2 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) 1))) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 02:21:33,752 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= (select |c_#valid| .cse0) 1) (not (= .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= (select |c_#valid| .cse1) 1) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_113| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_113| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse1)) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (= (let ((.cse2 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (select (store (store |c_#valid| (select .cse2 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) 0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select .cse2 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) 1))) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 02:21:34,572 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (let ((.cse2 (select .cse3 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse1 (select (store .cse3 (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (= (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (select (store (store |c_#valid| (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) 0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) 1) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (= (select |c_#valid| .cse1) 1) (= (select |c_#valid| .cse2) 1) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_113| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_113| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse1)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse2)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse2)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)) (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) is different from false [2021-11-23 02:21:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:34,866 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-11-23 02:21:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:21:34,867 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-23 02:21:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:34,868 INFO L225 Difference]: With dead ends: 71 [2021-11-23 02:21:34,868 INFO L226 Difference]: Without dead ends: 71 [2021-11-23 02:21:34,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 47.7s TimeCoverageRelationStatistics Valid=410, Invalid=4300, Unknown=6, NotChecked=834, Total=5550 [2021-11-23 02:21:34,869 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 45 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:34,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 778 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 254 Invalid, 0 Unknown, 233 Unchecked, 0.2s Time] [2021-11-23 02:21:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-23 02:21:34,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-23 02:21:34,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:21:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-11-23 02:21:34,873 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 29 [2021-11-23 02:21:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:34,873 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-11-23 02:21:34,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:21:34,874 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-11-23 02:21:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:21:34,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:34,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:34,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:21:35,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:21:35,085 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:21:35,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:35,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1570009666, now seen corresponding path program 1 times [2021-11-23 02:21:35,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:35,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921304561] [2021-11-23 02:21:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:35,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:21:35,556 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:35,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921304561] [2021-11-23 02:21:35,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921304561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:21:35,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026397680] [2021-11-23 02:21:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:35,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:21:35,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:21:35,557 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:21:35,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 02:21:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:35,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 02:21:35,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:21:35,614 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 02:21:35,648 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:21:35,648 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 02:21:35,716 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 02:21:35,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 02:21:35,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 02:21:35,795 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 02:21:35,795 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-23 02:21:35,861 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 02:21:35,861 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2021-11-23 02:21:35,934 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 02:21:35,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 60 [2021-11-23 02:21:36,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:21:36,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:21:36,096 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-11-23 02:21:36,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 60 [2021-11-23 02:21:36,537 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:21:36,537 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 46 treesize of output 52 [2021-11-23 02:21:37,499 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:21:37,499 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 25 treesize of output 30 [2021-11-23 02:21:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:21:37,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:21:38,733 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (= 1 (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (select (store (store |c_#valid| (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) 0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))))))) is different from false [2021-11-23 02:21:38,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:21:38,745 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 101 treesize of output 105 [2021-11-23 02:21:39,945 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) is different from false [2021-11-23 02:22:29,311 INFO L354 Elim1Store]: treesize reduction 249, result has 30.4 percent of original size [2021-11-23 02:22:29,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 169 [2021-11-23 02:22:29,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:22:29,327 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 169 treesize of output 183 [2021-11-23 02:22:29,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:22:29,344 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 183 treesize of output 199 [2021-11-23 02:22:29,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:22:29,361 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 199 treesize of output 215 [2021-11-23 02:22:29,531 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 6 treesize of output 4 [2021-11-23 02:22:29,606 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 6 treesize of output 4 [2021-11-23 02:22:29,693 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 4 [2021-11-23 02:22:29,772 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 4 [2021-11-23 02:22:29,836 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 4 [2021-11-23 02:22:29,876 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:22:29,877 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 15 treesize of output 9 [2021-11-23 02:22:30,000 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 4 [2021-11-23 02:22:30,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:22:30,035 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 19 treesize of output 23 [2021-11-23 02:22:30,120 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 6 treesize of output 4 [2021-11-23 02:22:30,185 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:22:30,185 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 15 treesize of output 9 [2021-11-23 02:22:30,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:22:30,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 159 [2021-11-23 02:22:30,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:22:30,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:22:30,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 176 treesize of output 354 [2021-11-23 02:22:37,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:22:37,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 166 [2021-11-23 02:22:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 02:22:38,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026397680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:22:38,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1195783346] [2021-11-23 02:22:38,821 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-23 02:22:38,821 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:22:38,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:22:38,821 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:22:38,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:22:38,842 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 02:22:38,853 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 02:22:38,857 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 02:22:38,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:38,871 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 21 treesize of output 20 [2021-11-23 02:22:38,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:38,878 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 21 treesize of output 20 [2021-11-23 02:22:38,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:38,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 02:22:38,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:38,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:38,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 02:22:38,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:38,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:38,953 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 28 treesize of output 30 [2021-11-23 02:22:38,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:38,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:38,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 02:22:38,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:38,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:38,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 02:22:39,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-11-23 02:22:39,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:22:39,098 INFO L354 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2021-11-23 02:22:39,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 326 treesize of output 306 [2021-11-23 02:22:39,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:22:39,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,133 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 02:22:39,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 317 [2021-11-23 02:22:39,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:22:39,269 INFO L354 Elim1Store]: treesize reduction 220, result has 15.7 percent of original size [2021-11-23 02:22:39,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 441 treesize of output 382 [2021-11-23 02:22:39,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:22:39,328 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 02:22:39,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 438 treesize of output 400 [2021-11-23 02:22:39,460 INFO L354 Elim1Store]: treesize reduction 88, result has 17.0 percent of original size [2021-11-23 02:22:39,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 404 treesize of output 398 [2021-11-23 02:22:39,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:22:39,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,604 INFO L354 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2021-11-23 02:22:39,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 326 treesize of output 306 [2021-11-23 02:22:39,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:22:39,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,639 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 02:22:39,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 317 [2021-11-23 02:22:39,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:22:39,773 INFO L354 Elim1Store]: treesize reduction 220, result has 15.7 percent of original size [2021-11-23 02:22:39,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 441 treesize of output 382 [2021-11-23 02:22:39,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:22:39,835 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 02:22:39,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 438 treesize of output 400 [2021-11-23 02:22:39,889 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 02:22:39,898 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 02:22:39,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,925 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 21 treesize of output 20 [2021-11-23 02:22:39,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:22:39,934 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 21 treesize of output 20 [2021-11-23 02:22:40,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:22:40,083 INFO L354 Elim1Store]: treesize reduction 28, result has 55.6 percent of original size [2021-11-23 02:22:40,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 31 treesize of output 53 [2021-11-23 02:22:40,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:22:40,222 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-23 02:22:40,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 39 treesize of output 48 [2021-11-23 02:22:40,372 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 02:22:40,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 404 treesize of output 394 [2021-11-23 02:22:40,431 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:22:47,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9890#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|)) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| |#StackHeapBarrier|) (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| 0)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 02:22:47,018 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:22:47,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:22:47,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 40 [2021-11-23 02:22:47,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054459834] [2021-11-23 02:22:47,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:22:47,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 02:22:47,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:47,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 02:22:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=3306, Unknown=35, NotChecked=238, Total=3906 [2021-11-23 02:22:47,021 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:22:54,047 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_120| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_120| 4)))) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (store .cse1 (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1) (<= 0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (<= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse2)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse2)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) is different from false [2021-11-23 02:22:54,863 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_120| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_120| 4)))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse1)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 02:22:55,571 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (= 1 (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (select (store (store |c_#valid| (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) 0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))))))) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_120| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_120| 4)))) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (store .cse1 (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse2)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse2)) (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) is different from false [2021-11-23 02:23:05,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:05,108 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-11-23 02:23:05,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 02:23:05,108 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-23 02:23:05,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:05,109 INFO L225 Difference]: With dead ends: 70 [2021-11-23 02:23:05,109 INFO L226 Difference]: Without dead ends: 70 [2021-11-23 02:23:05,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 76.6s TimeCoverageRelationStatistics Valid=424, Invalid=4242, Unknown=46, NotChecked=690, Total=5402 [2021-11-23 02:23:05,110 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 43 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:05,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 688 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 289 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2021-11-23 02:23:05,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-23 02:23:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-23 02:23:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:23:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-11-23 02:23:05,113 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 29 [2021-11-23 02:23:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:05,113 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-11-23 02:23:05,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:23:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-11-23 02:23:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 02:23:05,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:05,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:05,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:23:05,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:05,325 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-11-23 02:23:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:05,326 INFO L85 PathProgramCache]: Analyzing trace with hash -813510611, now seen corresponding path program 1 times [2021-11-23 02:23:05,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:05,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390817857] [2021-11-23 02:23:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:05,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:23:05,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390817857] [2021-11-23 02:23:05,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390817857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:23:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821871100] [2021-11-23 02:23:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:05,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:05,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:23:05,951 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:23:05,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68072d96-3cc9-4cbe-9808-63c2348f6492/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 02:23:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:05,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 02:23:06,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:23:06,238 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 02:23:06,302 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 02:23:06,302 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 55 [2021-11-23 02:23:06,411 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-23 02:23:06,411 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 65 [2021-11-23 02:23:06,509 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 02:23:06,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 128 treesize of output 83 [2021-11-23 02:23:06,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:23:06,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:23:06,712 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-11-23 02:23:06,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 113 treesize of output 83 [2021-11-23 02:23:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:23:07,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:23:10,424 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (let ((.cse0 (store (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select .cse2 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) 0)) (.cse1 (select .cse2 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (or (and (not (= (select .cse0 .cse1) 1)) (not (= .cse1 0))) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (= |c_ULTIMATE.start_main_old_#valid#1| (store .cse0 .cse1 0)))))) is different from false [2021-11-23 02:23:12,495 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (let ((.cse2 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (let ((.cse0 (store (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select .cse2 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) 0)) (.cse1 (select .cse2 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (= (store .cse0 .cse1 0) |c_ULTIMATE.start_main_old_#valid#1|) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (not (= .cse1 0)) (not (= (select .cse0 .cse1) 1))))))) is different from false [2021-11-23 02:23:43,726 INFO L354 Elim1Store]: treesize reduction 83, result has 30.8 percent of original size [2021-11-23 02:23:43,726 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 389 treesize of output 125 [2021-11-23 02:23:43,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:23:43,741 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 125 treesize of output 133 [2021-11-23 02:23:43,794 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 6 treesize of output 4 [2021-11-23 02:23:43,855 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 4 [2021-11-23 02:23:43,910 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:23:43,911 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 15 treesize of output 9 [2021-11-23 02:23:44,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:23:44,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:23:44,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 298 treesize of output 462