./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_7.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_7.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2a1f90505878c0035f7701a954d17ca4375eb05 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:39:20,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:39:20,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:39:20,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:39:20,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:39:20,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:39:20,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:39:20,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:39:20,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:39:20,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:39:20,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:39:20,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:39:20,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:39:20,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:39:20,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:39:20,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:39:20,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:39:20,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:39:20,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:39:20,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:39:20,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:39:20,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:39:20,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:39:20,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:39:20,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:39:20,559 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:39:20,559 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:39:20,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:39:20,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:39:20,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:39:20,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:39:20,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:39:20,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:39:20,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:39:20,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:39:20,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:39:20,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:39:20,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:39:20,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:39:20,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:39:20,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:39:20,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:39:20,613 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:39:20,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:39:20,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:39:20,619 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:39:20,619 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:39:20,619 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:39:20,619 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:39:20,620 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:39:20,620 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:39:20,620 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:39:20,621 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:39:20,621 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:39:20,622 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:39:20,622 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:39:20,622 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:39:20,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:39:20,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:39:20,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:39:20,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:39:20,624 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:39:20,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:39:20,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:39:20,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:39:20,625 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:39:20,625 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:39:20,625 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:39:20,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:39:20,627 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:39:20,627 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:39:20,627 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:39:20,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:39:20,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:39:20,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:39:20,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:39:20,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:39:20,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:39:20,629 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:39:20,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:39:20,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:39:20,629 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:39:20,636 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_e824d33d-6942-4eee-9915-24edcb7e21da/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a1f90505878c0035f7701a954d17ca4375eb05 [2020-11-28 07:39:20,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:39:20,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:39:20,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:39:20,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:39:20,929 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:39:20,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_7.c [2020-11-28 07:39:21,000 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/bin/utaipan/data/bac0fb5fe/3e7858fa59e44ff8a229d7bf75ab2589/FLAG61c825a2f [2020-11-28 07:39:21,535 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:39:21,536 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/sv-benchmarks/c/locks/test_locks_7.c [2020-11-28 07:39:21,550 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/bin/utaipan/data/bac0fb5fe/3e7858fa59e44ff8a229d7bf75ab2589/FLAG61c825a2f [2020-11-28 07:39:21,894 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/bin/utaipan/data/bac0fb5fe/3e7858fa59e44ff8a229d7bf75ab2589 [2020-11-28 07:39:21,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:39:21,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:39:21,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:21,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:39:21,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:39:21,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:21" (1/1) ... [2020-11-28 07:39:21,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6db11467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:21, skipping insertion in model container [2020-11-28 07:39:21,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:21" (1/1) ... [2020-11-28 07:39:21,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:39:21,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:39:22,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:22,117 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:39:22,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:22,153 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:39:22,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:22 WrapperNode [2020-11-28 07:39:22,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:22,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:22,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:39:22,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:39:22,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:22" (1/1) ... [2020-11-28 07:39:22,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:22" (1/1) ... [2020-11-28 07:39:22,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:22,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:39:22,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:39:22,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:39:22,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:22" (1/1) ... [2020-11-28 07:39:22,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:22" (1/1) ... [2020-11-28 07:39:22,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:22" (1/1) ... [2020-11-28 07:39:22,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:22" (1/1) ... [2020-11-28 07:39:22,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:22" (1/1) ... [2020-11-28 07:39:22,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:22" (1/1) ... [2020-11-28 07:39:22,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:22" (1/1) ... [2020-11-28 07:39:22,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:39:22,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:39:22,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:39:22,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:39:22,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/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 [2020-11-28 07:39:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:39:22,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:39:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:39:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:39:22,931 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:39:22,932 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-28 07:39:22,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:22 BoogieIcfgContainer [2020-11-28 07:39:22,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:39:22,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:39:22,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:39:22,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:39:22,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:39:21" (1/3) ... [2020-11-28 07:39:22,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65576ca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:22, skipping insertion in model container [2020-11-28 07:39:22,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:22" (2/3) ... [2020-11-28 07:39:22,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65576ca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:22, skipping insertion in model container [2020-11-28 07:39:22,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:22" (3/3) ... [2020-11-28 07:39:22,949 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-11-28 07:39:22,961 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:39:22,966 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 07:39:22,978 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 07:39:23,011 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:39:23,011 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:39:23,011 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:39:23,011 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:39:23,049 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:39:23,049 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:39:23,049 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:39:23,050 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:39:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-11-28 07:39:23,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:39:23,089 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:23,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:39:23,091 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:23,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:23,096 INFO L82 PathProgramCache]: Analyzing trace with hash 5514829, now seen corresponding path program 1 times [2020-11-28 07:39:23,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:23,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943408601] [2020-11-28 07:39:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:23,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943408601] [2020-11-28 07:39:23,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:23,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:39:23,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552041124] [2020-11-28 07:39:23,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:39:23,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:23,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:39:23,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:39:23,283 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-11-28 07:39:23,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:23,297 INFO L93 Difference]: Finished difference Result 23 states and 36 transitions. [2020-11-28 07:39:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:39:23,299 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-11-28 07:39:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:23,309 INFO L225 Difference]: With dead ends: 23 [2020-11-28 07:39:23,309 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 07:39:23,312 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 [2020-11-28 07:39:23,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 07:39:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-28 07:39:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 07:39:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 35 transitions. [2020-11-28 07:39:23,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 35 transitions. Word has length 4 [2020-11-28 07:39:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:23,361 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 35 transitions. [2020-11-28 07:39:23,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:39:23,361 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 35 transitions. [2020-11-28 07:39:23,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:39:23,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:23,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:39:23,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:39:23,362 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:23,363 INFO L82 PathProgramCache]: Analyzing trace with hash 166579390, now seen corresponding path program 1 times [2020-11-28 07:39:23,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:23,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236617041] [2020-11-28 07:39:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:23,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236617041] [2020-11-28 07:39:23,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:23,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:39:23,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527081521] [2020-11-28 07:39:23,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:39:23,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:23,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:39:23,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:39:23,437 INFO L87 Difference]: Start difference. First operand 22 states and 35 transitions. Second operand 3 states. [2020-11-28 07:39:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:23,442 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2020-11-28 07:39:23,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:39:23,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-28 07:39:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:23,443 INFO L225 Difference]: With dead ends: 21 [2020-11-28 07:39:23,443 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 07:39:23,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:39:23,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 07:39:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-28 07:39:23,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 07:39:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 32 transitions. [2020-11-28 07:39:23,449 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 32 transitions. Word has length 5 [2020-11-28 07:39:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:23,449 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 32 transitions. [2020-11-28 07:39:23,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:39:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 32 transitions. [2020-11-28 07:39:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:39:23,450 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:23,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:39:23,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:39:23,451 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:23,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:23,452 INFO L82 PathProgramCache]: Analyzing trace with hash 873444667, now seen corresponding path program 1 times [2020-11-28 07:39:23,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:23,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652665968] [2020-11-28 07:39:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:23,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652665968] [2020-11-28 07:39:23,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:23,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:23,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209038873] [2020-11-28 07:39:23,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:23,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:23,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:23,521 INFO L87 Difference]: Start difference. First operand 19 states and 32 transitions. Second operand 4 states. [2020-11-28 07:39:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:23,554 INFO L93 Difference]: Finished difference Result 35 states and 58 transitions. [2020-11-28 07:39:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:23,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 07:39:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:23,557 INFO L225 Difference]: With dead ends: 35 [2020-11-28 07:39:23,557 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 07:39:23,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 07:39:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 19. [2020-11-28 07:39:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 07:39:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 31 transitions. [2020-11-28 07:39:23,562 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 31 transitions. Word has length 6 [2020-11-28 07:39:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:23,562 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 31 transitions. [2020-11-28 07:39:23,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 31 transitions. [2020-11-28 07:39:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:39:23,562 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:23,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:23,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:39:23,563 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:23,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:23,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1307195221, now seen corresponding path program 1 times [2020-11-28 07:39:23,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:23,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096323435] [2020-11-28 07:39:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:23,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096323435] [2020-11-28 07:39:23,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:23,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:23,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946200540] [2020-11-28 07:39:23,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:23,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:23,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:23,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:23,632 INFO L87 Difference]: Start difference. First operand 19 states and 31 transitions. Second operand 4 states. [2020-11-28 07:39:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:23,681 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2020-11-28 07:39:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:23,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-28 07:39:23,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:23,682 INFO L225 Difference]: With dead ends: 33 [2020-11-28 07:39:23,683 INFO L226 Difference]: Without dead ends: 33 [2020-11-28 07:39:23,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-28 07:39:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 19. [2020-11-28 07:39:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 07:39:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2020-11-28 07:39:23,687 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 7 [2020-11-28 07:39:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:23,687 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2020-11-28 07:39:23,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2020-11-28 07:39:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:39:23,687 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:23,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:23,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:39:23,688 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:23,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:23,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1868560848, now seen corresponding path program 1 times [2020-11-28 07:39:23,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:23,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636496576] [2020-11-28 07:39:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:23,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636496576] [2020-11-28 07:39:23,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:23,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:23,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912925951] [2020-11-28 07:39:23,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:23,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:23,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:23,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:23,763 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand 4 states. [2020-11-28 07:39:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:23,792 INFO L93 Difference]: Finished difference Result 31 states and 48 transitions. [2020-11-28 07:39:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:23,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 07:39:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:23,794 INFO L225 Difference]: With dead ends: 31 [2020-11-28 07:39:23,794 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 07:39:23,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:23,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 07:39:23,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2020-11-28 07:39:23,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 07:39:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 29 transitions. [2020-11-28 07:39:23,814 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 29 transitions. Word has length 8 [2020-11-28 07:39:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:23,815 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 29 transitions. [2020-11-28 07:39:23,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:23,815 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 29 transitions. [2020-11-28 07:39:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:39:23,816 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:23,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:23,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:39:23,816 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:23,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2091026442, now seen corresponding path program 1 times [2020-11-28 07:39:23,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:23,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146634041] [2020-11-28 07:39:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:23,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146634041] [2020-11-28 07:39:23,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:23,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:23,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518616201] [2020-11-28 07:39:23,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:23,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:23,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:23,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:23,901 INFO L87 Difference]: Start difference. First operand 19 states and 29 transitions. Second operand 4 states. [2020-11-28 07:39:23,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:23,930 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2020-11-28 07:39:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:23,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-28 07:39:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:23,932 INFO L225 Difference]: With dead ends: 29 [2020-11-28 07:39:23,932 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 07:39:23,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 07:39:23,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-11-28 07:39:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 07:39:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 28 transitions. [2020-11-28 07:39:23,936 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 28 transitions. Word has length 9 [2020-11-28 07:39:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:23,936 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 28 transitions. [2020-11-28 07:39:23,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:23,936 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 28 transitions. [2020-11-28 07:39:23,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:39:23,937 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:23,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:23,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:39:23,940 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash 397525605, now seen corresponding path program 1 times [2020-11-28 07:39:23,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:23,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260607149] [2020-11-28 07:39:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:24,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260607149] [2020-11-28 07:39:24,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:24,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:24,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597959263] [2020-11-28 07:39:24,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:24,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:24,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:24,006 INFO L87 Difference]: Start difference. First operand 19 states and 28 transitions. Second operand 4 states. [2020-11-28 07:39:24,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:24,028 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2020-11-28 07:39:24,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:24,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-28 07:39:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:24,030 INFO L225 Difference]: With dead ends: 27 [2020-11-28 07:39:24,030 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 07:39:24,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 07:39:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2020-11-28 07:39:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 07:39:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 27 transitions. [2020-11-28 07:39:24,034 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 27 transitions. Word has length 10 [2020-11-28 07:39:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:24,035 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 27 transitions. [2020-11-28 07:39:24,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 27 transitions. [2020-11-28 07:39:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:39:24,036 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:24,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:24,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:39:24,037 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash -561392449, now seen corresponding path program 1 times [2020-11-28 07:39:24,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:24,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443525322] [2020-11-28 07:39:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:24,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443525322] [2020-11-28 07:39:24,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:24,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:24,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563785982] [2020-11-28 07:39:24,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:24,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:24,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:24,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:24,080 INFO L87 Difference]: Start difference. First operand 19 states and 27 transitions. Second operand 4 states. [2020-11-28 07:39:24,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:24,119 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2020-11-28 07:39:24,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:24,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 07:39:24,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:24,120 INFO L225 Difference]: With dead ends: 25 [2020-11-28 07:39:24,120 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 07:39:24,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:24,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 07:39:24,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2020-11-28 07:39:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 07:39:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2020-11-28 07:39:24,128 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 11 [2020-11-28 07:39:24,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:24,129 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2020-11-28 07:39:24,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:24,130 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2020-11-28 07:39:24,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:39:24,131 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:24,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:24,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:39:24,132 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:39:24,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:24,133 INFO L82 PathProgramCache]: Analyzing trace with hash -223080710, now seen corresponding path program 1 times [2020-11-28 07:39:24,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:24,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389793644] [2020-11-28 07:39:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:24,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389793644] [2020-11-28 07:39:24,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:24,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:24,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767241946] [2020-11-28 07:39:24,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:24,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:24,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:24,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:24,196 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 4 states. [2020-11-28 07:39:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:24,229 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2020-11-28 07:39:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:24,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-28 07:39:24,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:24,232 INFO L225 Difference]: With dead ends: 19 [2020-11-28 07:39:24,232 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:39:24,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:39:24,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:39:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:39:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:39:24,233 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-11-28 07:39:24,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:24,234 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:39:24,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:39:24,234 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:39:24,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:39:24,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:39:24 BoogieIcfgContainer [2020-11-28 07:39:24,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:39:24,246 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:39:24,246 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:39:24,247 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:39:24,247 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:22" (3/4) ... [2020-11-28 07:39:24,251 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:39:24,267 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-11-28 07:39:24,268 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-28 07:39:24,268 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 07:39:24,275 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:39:24,344 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e824d33d-6942-4eee-9915-24edcb7e21da/bin/utaipan/witness.graphml [2020-11-28 07:39:24,350 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:39:24,352 INFO L168 Benchmark]: Toolchain (without parser) took 2453.71 ms. Allocated memory was 100.7 MB in the beginning and 130.0 MB in the end (delta: 29.4 MB). Free memory was 73.8 MB in the beginning and 74.5 MB in the end (delta: -629.7 kB). Peak memory consumption was 28.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:24,352 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 75.5 MB. Free memory is still 37.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:24,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.62 ms. Allocated memory is still 100.7 MB. Free memory was 73.8 MB in the beginning and 77.8 MB in the end (delta: -3.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:24,354 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.68 ms. Allocated memory is still 100.7 MB. Free memory was 77.8 MB in the beginning and 76.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:24,355 INFO L168 Benchmark]: Boogie Preprocessor took 25.30 ms. Allocated memory is still 100.7 MB. Free memory was 76.0 MB in the beginning and 75.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:24,356 INFO L168 Benchmark]: RCFGBuilder took 714.20 ms. Allocated memory is still 100.7 MB. Free memory was 75.0 MB in the beginning and 47.0 MB in the end (delta: 28.0 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:24,356 INFO L168 Benchmark]: TraceAbstraction took 1310.19 ms. Allocated memory was 100.7 MB in the beginning and 130.0 MB in the end (delta: 29.4 MB). Free memory was 46.3 MB in the beginning and 77.9 MB in the end (delta: -31.6 MB). Peak memory consumption was 456.5 kB. Max. memory is 16.1 GB. [2020-11-28 07:39:24,357 INFO L168 Benchmark]: Witness Printer took 103.76 ms. Allocated memory is still 130.0 MB. Free memory was 77.9 MB in the beginning and 74.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:24,361 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 75.5 MB. Free memory is still 37.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 255.62 ms. Allocated memory is still 100.7 MB. Free memory was 73.8 MB in the beginning and 77.8 MB in the end (delta: -3.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.68 ms. Allocated memory is still 100.7 MB. Free memory was 77.8 MB in the beginning and 76.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.30 ms. Allocated memory is still 100.7 MB. Free memory was 76.0 MB in the beginning and 75.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 714.20 ms. Allocated memory is still 100.7 MB. Free memory was 75.0 MB in the beginning and 47.0 MB in the end (delta: 28.0 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1310.19 ms. Allocated memory was 100.7 MB in the beginning and 130.0 MB in the end (delta: 29.4 MB). Free memory was 46.3 MB in the beginning and 77.9 MB in the end (delta: -31.6 MB). Peak memory consumption was 456.5 kB. Max. memory is 16.1 GB. * Witness Printer took 103.76 ms. Allocated memory is still 130.0 MB. Free memory was 77.9 MB in the beginning and 74.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 183 SDslu, 257 SDs, 0 SdLazy, 63 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, 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, 9 MinimizatonAttempts, 66 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 2157 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...