./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/alternating_list-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/alternating_list-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da856cb29218eae000c82400da3ef1c667e9f55c ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 18:52:29,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:52:29,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:52:29,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:52:29,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:52:29,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:52:29,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:52:29,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:52:29,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:52:29,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:52:29,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:52:29,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:52:29,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:52:29,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:52:29,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:52:29,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:52:29,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:52:29,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:52:29,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:52:29,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:52:29,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:52:29,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:52:29,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:52:29,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:52:29,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:52:29,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:52:29,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:52:29,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:52:29,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:52:29,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:52:29,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:52:29,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:52:29,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:52:29,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:52:29,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:52:29,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:52:29,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:52:29,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:52:29,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:52:29,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:52:29,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:52:29,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2020-12-09 18:52:29,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:52:29,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:52:29,247 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:52:29,247 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:52:29,247 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:52:29,248 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:52:29,248 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 18:52:29,248 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:52:29,248 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:52:29,248 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 18:52:29,248 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 18:52:29,249 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:52:29,249 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 18:52:29,249 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 18:52:29,249 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 18:52:29,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 18:52:29,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 18:52:29,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:52:29,250 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 18:52:29,251 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 18:52:29,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 18:52:29,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 18:52:29,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:52:29,251 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 18:52:29,251 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 18:52:29,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:52:29,252 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 18:52:29,252 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 18:52:29,252 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:52:29,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:52:29,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:52:29,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:52:29,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:52:29,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:52:29,253 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 18:52:29,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 18:52:29,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:52:29,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:52:29,254 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-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da856cb29218eae000c82400da3ef1c667e9f55c [2020-12-09 18:52:29,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:52:29,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:52:29,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:52:29,458 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:52:29,458 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:52:29,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan/../../sv-benchmarks/c/list-properties/alternating_list-2.i [2020-12-09 18:52:29,506 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan/data/9dacc1d03/1907b20d946c4fc88b16b331beedce14/FLAGc33457828 [2020-12-09 18:52:29,898 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:52:29,898 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/sv-benchmarks/c/list-properties/alternating_list-2.i [2020-12-09 18:52:29,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan/data/9dacc1d03/1907b20d946c4fc88b16b331beedce14/FLAGc33457828 [2020-12-09 18:52:30,279 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan/data/9dacc1d03/1907b20d946c4fc88b16b331beedce14 [2020-12-09 18:52:30,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:52:30,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:52:30,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:52:30,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:52:30,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:52:30,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:52:30" (1/1) ... [2020-12-09 18:52:30,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@655e7480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:52:30, skipping insertion in model container [2020-12-09 18:52:30,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:52:30" (1/1) ... [2020-12-09 18:52:30,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:52:30,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:52:30,492 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/sv-benchmarks/c/list-properties/alternating_list-2.i[23574,23587] [2020-12-09 18:52:30,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:52:30,501 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:52:30,531 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/sv-benchmarks/c/list-properties/alternating_list-2.i[23574,23587] [2020-12-09 18:52:30,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:52:30,567 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:52:30,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:52:30 WrapperNode [2020-12-09 18:52:30,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:52:30,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:52:30,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:52:30,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:52:30,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:52:30" (1/1) ... [2020-12-09 18:52:30,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:52:30" (1/1) ... [2020-12-09 18:52:30,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:52:30,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:52:30,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:52:30,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:52:30,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:52:30" (1/1) ... [2020-12-09 18:52:30,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:52:30" (1/1) ... [2020-12-09 18:52:30,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:52:30" (1/1) ... [2020-12-09 18:52:30,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:52:30" (1/1) ... [2020-12-09 18:52:30,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:52:30" (1/1) ... [2020-12-09 18:52:30,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:52:30" (1/1) ... [2020-12-09 18:52:30,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:52:30" (1/1) ... [2020-12-09 18:52:30,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:52:30,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:52:30,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:52:30,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:52:30,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:52:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:52:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 18:52:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 18:52:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 18:52:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 18:52:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 18:52:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 18:52:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 18:52:30,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 18:52:30,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:52:30,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:52:31,055 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:52:31,056 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 18:52:31,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:52:31 BoogieIcfgContainer [2020-12-09 18:52:31,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:52:31,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:52:31,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:52:31,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:52:31,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:52:30" (1/3) ... [2020-12-09 18:52:31,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@266fc0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:52:31, skipping insertion in model container [2020-12-09 18:52:31,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:52:30" (2/3) ... [2020-12-09 18:52:31,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@266fc0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:52:31, skipping insertion in model container [2020-12-09 18:52:31,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:52:31" (3/3) ... [2020-12-09 18:52:31,065 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-12-09 18:52:31,078 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:52:31,081 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 30 error locations. [2020-12-09 18:52:31,088 INFO L253 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2020-12-09 18:52:31,102 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:52:31,102 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 18:52:31,102 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:52:31,102 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:52:31,102 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:52:31,102 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:52:31,102 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:52:31,102 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:52:31,113 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-12-09 18:52:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 18:52:31,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:31,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 18:52:31,118 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:31,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:31,122 INFO L82 PathProgramCache]: Analyzing trace with hash 5236202, now seen corresponding path program 1 times [2020-12-09 18:52:31,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:31,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950000044] [2020-12-09 18:52:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:52:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:52:31,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950000044] [2020-12-09 18:52:31,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:52:31,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:52:31,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056257009] [2020-12-09 18:52:31,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 18:52:31,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:52:31,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 18:52:31,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 18:52:31,243 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 2 states. [2020-12-09 18:52:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:52:31,253 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-12-09 18:52:31,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 18:52:31,254 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 18:52:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:52:31,260 INFO L225 Difference]: With dead ends: 65 [2020-12-09 18:52:31,260 INFO L226 Difference]: Without dead ends: 62 [2020-12-09 18:52:31,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 18:52:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-09 18:52:31,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-09 18:52:31,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-09 18:52:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-12-09 18:52:31,285 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 4 [2020-12-09 18:52:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:52:31,286 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-12-09 18:52:31,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 18:52:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-12-09 18:52:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 18:52:31,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:31,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 18:52:31,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 18:52:31,287 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:31,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:31,287 INFO L82 PathProgramCache]: Analyzing trace with hash 162286604, now seen corresponding path program 1 times [2020-12-09 18:52:31,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:31,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293038432] [2020-12-09 18:52:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:52:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:52:31,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293038432] [2020-12-09 18:52:31,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:52:31,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:52:31,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664888996] [2020-12-09 18:52:31,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:52:31,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:52:31,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:52:31,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:52:31,344 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 4 states. [2020-12-09 18:52:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:52:31,445 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-12-09 18:52:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:52:31,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 18:52:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:52:31,448 INFO L225 Difference]: With dead ends: 82 [2020-12-09 18:52:31,448 INFO L226 Difference]: Without dead ends: 82 [2020-12-09 18:52:31,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:52:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-09 18:52:31,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-12-09 18:52:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-09 18:52:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-12-09 18:52:31,457 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 5 [2020-12-09 18:52:31,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:52:31,457 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-12-09 18:52:31,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:52:31,458 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-12-09 18:52:31,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 18:52:31,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:31,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 18:52:31,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 18:52:31,459 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:31,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:31,459 INFO L82 PathProgramCache]: Analyzing trace with hash 162286605, now seen corresponding path program 1 times [2020-12-09 18:52:31,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:31,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809002581] [2020-12-09 18:52:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:52:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:52:31,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809002581] [2020-12-09 18:52:31,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:52:31,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:52:31,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625567216] [2020-12-09 18:52:31,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:52:31,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:52:31,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:52:31,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:52:31,521 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 4 states. [2020-12-09 18:52:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:52:31,615 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-12-09 18:52:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:52:31,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 18:52:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:52:31,616 INFO L225 Difference]: With dead ends: 85 [2020-12-09 18:52:31,617 INFO L226 Difference]: Without dead ends: 85 [2020-12-09 18:52:31,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:52:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-09 18:52:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2020-12-09 18:52:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-09 18:52:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-12-09 18:52:31,623 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 5 [2020-12-09 18:52:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:52:31,623 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-12-09 18:52:31,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:52:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-12-09 18:52:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 18:52:31,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:31,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:52:31,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 18:52:31,624 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:31,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:31,624 INFO L82 PathProgramCache]: Analyzing trace with hash -235219718, now seen corresponding path program 1 times [2020-12-09 18:52:31,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:31,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358897731] [2020-12-09 18:52:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:52:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:52:31,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358897731] [2020-12-09 18:52:31,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:52:31,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:52:31,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330876946] [2020-12-09 18:52:31,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:52:31,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:52:31,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:52:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:52:31,653 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 3 states. [2020-12-09 18:52:31,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:52:31,664 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2020-12-09 18:52:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:52:31,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-09 18:52:31,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:52:31,666 INFO L225 Difference]: With dead ends: 122 [2020-12-09 18:52:31,666 INFO L226 Difference]: Without dead ends: 122 [2020-12-09 18:52:31,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:52:31,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-09 18:52:31,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 85. [2020-12-09 18:52:31,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-09 18:52:31,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2020-12-09 18:52:31,672 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 11 [2020-12-09 18:52:31,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:52:31,672 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2020-12-09 18:52:31,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:52:31,672 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2020-12-09 18:52:31,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 18:52:31,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:31,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:52:31,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 18:52:31,673 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:31,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:31,674 INFO L82 PathProgramCache]: Analyzing trace with hash -235527548, now seen corresponding path program 1 times [2020-12-09 18:52:31,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:31,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307162568] [2020-12-09 18:52:31,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:52:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:52:31,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307162568] [2020-12-09 18:52:31,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:52:31,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 18:52:31,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172961048] [2020-12-09 18:52:31,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:52:31,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:52:31,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:52:31,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:52:31,729 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 5 states. [2020-12-09 18:52:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:52:31,831 INFO L93 Difference]: Finished difference Result 105 states and 119 transitions. [2020-12-09 18:52:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:52:31,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 18:52:31,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:52:31,833 INFO L225 Difference]: With dead ends: 105 [2020-12-09 18:52:31,833 INFO L226 Difference]: Without dead ends: 105 [2020-12-09 18:52:31,833 INFO L677 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 [2020-12-09 18:52:31,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-09 18:52:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2020-12-09 18:52:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-09 18:52:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-12-09 18:52:31,838 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 11 [2020-12-09 18:52:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:52:31,838 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-12-09 18:52:31,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:52:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-12-09 18:52:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 18:52:31,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:31,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:52:31,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 18:52:31,839 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:31,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1257210621, now seen corresponding path program 1 times [2020-12-09 18:52:31,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:31,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360512812] [2020-12-09 18:52:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:52:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:52:31,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360512812] [2020-12-09 18:52:31,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:52:31,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:52:31,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918334909] [2020-12-09 18:52:31,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:52:31,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:52:31,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:52:31,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:52:31,872 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 4 states. [2020-12-09 18:52:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:52:31,931 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-12-09 18:52:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:52:31,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 18:52:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:52:31,932 INFO L225 Difference]: With dead ends: 91 [2020-12-09 18:52:31,932 INFO L226 Difference]: Without dead ends: 91 [2020-12-09 18:52:31,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:52:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-09 18:52:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-12-09 18:52:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-09 18:52:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2020-12-09 18:52:31,937 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 12 [2020-12-09 18:52:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:52:31,937 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2020-12-09 18:52:31,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:52:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2020-12-09 18:52:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 18:52:31,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:31,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:52:31,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 18:52:31,938 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:31,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1257213090, now seen corresponding path program 1 times [2020-12-09 18:52:31,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:31,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818047221] [2020-12-09 18:52:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:52:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:52:31,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818047221] [2020-12-09 18:52:31,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:52:31,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:52:31,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125533982] [2020-12-09 18:52:31,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:52:31,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:52:31,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:52:31,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:52:31,975 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 5 states. [2020-12-09 18:52:32,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:52:32,032 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2020-12-09 18:52:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 18:52:32,033 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 18:52:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:52:32,033 INFO L225 Difference]: With dead ends: 95 [2020-12-09 18:52:32,033 INFO L226 Difference]: Without dead ends: 95 [2020-12-09 18:52:32,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 18:52:32,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-09 18:52:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-12-09 18:52:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-09 18:52:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-12-09 18:52:32,038 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 12 [2020-12-09 18:52:32,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:52:32,038 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-12-09 18:52:32,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:52:32,038 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-12-09 18:52:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 18:52:32,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:32,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:52:32,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 18:52:32,039 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:32,039 INFO L82 PathProgramCache]: Analyzing trace with hash 318900274, now seen corresponding path program 1 times [2020-12-09 18:52:32,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:32,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044066256] [2020-12-09 18:52:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:52:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:52:32,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044066256] [2020-12-09 18:52:32,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:52:32,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:52:32,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947879015] [2020-12-09 18:52:32,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 18:52:32,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:52:32,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 18:52:32,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:52:32,080 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 6 states. [2020-12-09 18:52:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:52:32,168 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2020-12-09 18:52:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 18:52:32,169 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-09 18:52:32,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:52:32,169 INFO L225 Difference]: With dead ends: 96 [2020-12-09 18:52:32,169 INFO L226 Difference]: Without dead ends: 96 [2020-12-09 18:52:32,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-09 18:52:32,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-09 18:52:32,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-12-09 18:52:32,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-09 18:52:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2020-12-09 18:52:32,173 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 13 [2020-12-09 18:52:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:52:32,173 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2020-12-09 18:52:32,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 18:52:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2020-12-09 18:52:32,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 18:52:32,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:32,174 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:52:32,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 18:52:32,174 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:32,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:32,175 INFO L82 PathProgramCache]: Analyzing trace with hash 7986565, now seen corresponding path program 1 times [2020-12-09 18:52:32,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:32,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910149262] [2020-12-09 18:52:32,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:52:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:52:32,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910149262] [2020-12-09 18:52:32,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:52:32,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:52:32,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982904] [2020-12-09 18:52:32,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:52:32,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:52:32,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:52:32,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:52:32,212 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 5 states. [2020-12-09 18:52:32,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:52:32,314 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2020-12-09 18:52:32,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 18:52:32,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-09 18:52:32,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:52:32,315 INFO L225 Difference]: With dead ends: 98 [2020-12-09 18:52:32,315 INFO L226 Difference]: Without dead ends: 98 [2020-12-09 18:52:32,315 INFO L677 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 [2020-12-09 18:52:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-09 18:52:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-12-09 18:52:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-09 18:52:32,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-12-09 18:52:32,318 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 13 [2020-12-09 18:52:32,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:52:32,318 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-12-09 18:52:32,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:52:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-12-09 18:52:32,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 18:52:32,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:32,319 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:52:32,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 18:52:32,319 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:32,320 INFO L82 PathProgramCache]: Analyzing trace with hash 7986566, now seen corresponding path program 1 times [2020-12-09 18:52:32,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:32,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524289686] [2020-12-09 18:52:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:52:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:52:32,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524289686] [2020-12-09 18:52:32,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:52:32,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:52:32,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974581363] [2020-12-09 18:52:32,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:52:32,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:52:32,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:52:32,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:52:32,360 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 5 states. [2020-12-09 18:52:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:52:32,476 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-12-09 18:52:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 18:52:32,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-09 18:52:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:52:32,477 INFO L225 Difference]: With dead ends: 109 [2020-12-09 18:52:32,477 INFO L226 Difference]: Without dead ends: 109 [2020-12-09 18:52:32,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 18:52:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-09 18:52:32,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 76. [2020-12-09 18:52:32,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-09 18:52:32,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2020-12-09 18:52:32,480 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 13 [2020-12-09 18:52:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:52:32,481 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2020-12-09 18:52:32,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:52:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2020-12-09 18:52:32,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 18:52:32,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:32,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:52:32,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 18:52:32,482 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:32,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1293601699, now seen corresponding path program 1 times [2020-12-09 18:52:32,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:32,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439838892] [2020-12-09 18:52:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:52:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:52:32,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439838892] [2020-12-09 18:52:32,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:52:32,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:52:32,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420871710] [2020-12-09 18:52:32,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:52:32,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:52:32,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:52:32,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:52:32,548 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 5 states. [2020-12-09 18:52:32,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:52:32,643 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-12-09 18:52:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:52:32,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 18:52:32,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:52:32,645 INFO L225 Difference]: With dead ends: 91 [2020-12-09 18:52:32,645 INFO L226 Difference]: Without dead ends: 87 [2020-12-09 18:52:32,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 18:52:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-09 18:52:32,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-12-09 18:52:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-09 18:52:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2020-12-09 18:52:32,649 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 14 [2020-12-09 18:52:32,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:52:32,649 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2020-12-09 18:52:32,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:52:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2020-12-09 18:52:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 18:52:32,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:32,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:52:32,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 18:52:32,650 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:32,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:32,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1295974052, now seen corresponding path program 1 times [2020-12-09 18:52:32,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:32,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024123168] [2020-12-09 18:52:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:52:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:52:32,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024123168] [2020-12-09 18:52:32,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:52:32,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:52:32,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426989878] [2020-12-09 18:52:32,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:52:32,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:52:32,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:52:32,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:52:32,696 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand 5 states. [2020-12-09 18:52:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:52:32,749 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-12-09 18:52:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:52:32,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 18:52:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:52:32,750 INFO L225 Difference]: With dead ends: 78 [2020-12-09 18:52:32,750 INFO L226 Difference]: Without dead ends: 78 [2020-12-09 18:52:32,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:52:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-09 18:52:32,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-09 18:52:32,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-09 18:52:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-12-09 18:52:32,754 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 14 [2020-12-09 18:52:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:52:32,754 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-12-09 18:52:32,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:52:32,754 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-12-09 18:52:32,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 18:52:32,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:32,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:52:32,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-09 18:52:32,755 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:32,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:32,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1520490083, now seen corresponding path program 1 times [2020-12-09 18:52:32,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:32,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782717779] [2020-12-09 18:52:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:52:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:52:32,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782717779] [2020-12-09 18:52:32,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:52:32,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 18:52:32,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162424400] [2020-12-09 18:52:32,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 18:52:32,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:52:32,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 18:52:32,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:52:32,810 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 6 states. [2020-12-09 18:52:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:52:32,897 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2020-12-09 18:52:32,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:52:32,898 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-09 18:52:32,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:52:32,898 INFO L225 Difference]: With dead ends: 90 [2020-12-09 18:52:32,898 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 18:52:32,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-09 18:52:32,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 18:52:32,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2020-12-09 18:52:32,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-09 18:52:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-12-09 18:52:32,900 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 15 [2020-12-09 18:52:32,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:52:32,900 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-12-09 18:52:32,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 18:52:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-12-09 18:52:32,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 18:52:32,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:52:32,901 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:52:32,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-09 18:52:32,901 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 18:52:32,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:52:32,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1130689853, now seen corresponding path program 1 times [2020-12-09 18:52:32,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:52:32,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370635069] [2020-12-09 18:52:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:52:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 18:52:32,915 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 18:52:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 18:52:32,924 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 18:52:32,940 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 18:52:32,940 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 18:52:32,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-09 18:52:32,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:52:32 BoogieIcfgContainer [2020-12-09 18:52:32,961 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:52:32,961 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:52:32,962 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:52:32,962 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:52:32,962 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:52:31" (3/4) ... [2020-12-09 18:52:32,963 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 18:52:32,993 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_70999cb9-8adc-4119-b6d5-1fd422cec263/bin/utaipan/witness.graphml [2020-12-09 18:52:32,993 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:52:32,995 INFO L168 Benchmark]: Toolchain (without parser) took 2710.12 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 67.3 MB in the beginning and 35.6 MB in the end (delta: 31.7 MB). Peak memory consumption was 73.6 MB. Max. memory is 16.1 GB. [2020-12-09 18:52:32,995 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 69.2 MB. Free memory was 44.4 MB in the beginning and 44.3 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:52:32,996 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.64 ms. Allocated memory is still 90.2 MB. Free memory was 67.3 MB in the beginning and 45.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:52:32,996 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.51 ms. Allocated memory is still 90.2 MB. Free memory was 45.3 MB in the beginning and 68.7 MB in the end (delta: -23.4 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. [2020-12-09 18:52:32,997 INFO L168 Benchmark]: Boogie Preprocessor took 22.14 ms. Allocated memory is still 90.2 MB. Free memory was 68.7 MB in the beginning and 67.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:52:32,997 INFO L168 Benchmark]: RCFGBuilder took 432.95 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 67.2 MB in the beginning and 81.6 MB in the end (delta: -14.4 MB). Peak memory consumption was 26.8 MB. Max. memory is 16.1 GB. [2020-12-09 18:52:32,998 INFO L168 Benchmark]: TraceAbstraction took 1901.72 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 81.6 MB in the beginning and 38.8 MB in the end (delta: 42.9 MB). Peak memory consumption was 66.2 MB. Max. memory is 16.1 GB. [2020-12-09 18:52:32,998 INFO L168 Benchmark]: Witness Printer took 31.51 ms. Allocated memory is still 132.1 MB. Free memory was 38.8 MB in the beginning and 35.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:52:33,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 69.2 MB. Free memory was 44.4 MB in the beginning and 44.3 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 282.64 ms. Allocated memory is still 90.2 MB. Free memory was 67.3 MB in the beginning and 45.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.51 ms. Allocated memory is still 90.2 MB. Free memory was 45.3 MB in the beginning and 68.7 MB in the end (delta: -23.4 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.14 ms. Allocated memory is still 90.2 MB. Free memory was 68.7 MB in the beginning and 67.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 432.95 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 67.2 MB in the beginning and 81.6 MB in the end (delta: -14.4 MB). Peak memory consumption was 26.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1901.72 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 81.6 MB in the beginning and 38.8 MB in the end (delta: 42.9 MB). Peak memory consumption was 66.2 MB. Max. memory is 16.1 GB. * Witness Printer took 31.51 ms. Allocated memory is still 132.1 MB. Free memory was 38.8 MB in the beginning and 35.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 573]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List p = a; [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 2 [L540] flag = 0 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] flag = 1 [L553] EXPR p->h [L553] COND TRUE p->h != 3 [L554] COND TRUE \read(flag) [L555] flag = 0 [L556] EXPR p->h [L556] COND TRUE p->h != 1 [L573] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 65 locations, 30 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 14, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 598 SDtfs, 808 SDslu, 698 SDs, 0 SdLazy, 915 SolverSat, 124 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 161 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 7425 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 5/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...