./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_8.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_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_8.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 37d0ed05d77a0379c9ed98058bf2f327252773ce ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 03:21:43,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:21:43,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:21:43,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:21:43,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:21:43,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:21:43,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:21:43,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:21:43,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:21:43,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:21:43,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:21:43,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:21:43,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:21:43,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:21:43,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:21:43,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:21:43,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:21:43,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:21:43,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:21:43,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:21:43,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:21:43,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:21:43,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:21:43,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:21:43,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:21:43,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:21:43,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:21:43,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:21:43,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:21:43,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:21:43,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:21:43,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:21:43,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:21:43,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:21:43,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:21:43,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:21:43,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:21:43,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:21:43,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:21:43,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:21:43,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:21:43,485 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:21:43,524 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:21:43,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:21:43,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:21:43,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:21:43,527 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:21:43,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:21:43,527 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:21:43,528 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:21:43,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:21:43,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:21:43,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:21:43,529 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:21:43,529 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:21:43,530 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:21:43,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:21:43,530 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:21:43,530 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:21:43,530 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:21:43,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:21:43,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:21:43,531 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:21:43,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:21:43,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:21:43,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:21:43,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:21:43,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:21:43,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:21:43,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:21:43,532 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37d0ed05d77a0379c9ed98058bf2f327252773ce [2020-11-28 03:21:43,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:21:43,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:21:43,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:21:43,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:21:43,825 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:21:43,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer/../../sv-benchmarks/c/locks/test_locks_8.c [2020-11-28 03:21:43,922 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer/data/8068dbe39/91b0c4f5577546339c50ee77ea7cd244/FLAG2c2e7858d [2020-11-28 03:21:44,361 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:21:44,361 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/sv-benchmarks/c/locks/test_locks_8.c [2020-11-28 03:21:44,368 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer/data/8068dbe39/91b0c4f5577546339c50ee77ea7cd244/FLAG2c2e7858d [2020-11-28 03:21:44,768 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer/data/8068dbe39/91b0c4f5577546339c50ee77ea7cd244 [2020-11-28 03:21:44,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:21:44,772 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:21:44,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:21:44,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:21:44,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:21:44,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:21:44" (1/1) ... [2020-11-28 03:21:44,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329c3431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:44, skipping insertion in model container [2020-11-28 03:21:44,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:21:44" (1/1) ... [2020-11-28 03:21:44,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:21:44,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:21:44,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:21:44,969 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:21:45,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:21:45,057 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:21:45,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:45 WrapperNode [2020-11-28 03:21:45,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:21:45,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:21:45,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:21:45,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:21:45,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:45" (1/1) ... [2020-11-28 03:21:45,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:45" (1/1) ... [2020-11-28 03:21:45,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:45" (1/1) ... [2020-11-28 03:21:45,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:45" (1/1) ... [2020-11-28 03:21:45,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:45" (1/1) ... [2020-11-28 03:21:45,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:45" (1/1) ... [2020-11-28 03:21:45,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:45" (1/1) ... [2020-11-28 03:21:45,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:21:45,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:21:45,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:21:45,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:21:45,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer/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 03:21:45,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:21:45,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:21:45,166 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-28 03:21:45,166 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:21:45,169 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-28 03:21:45,170 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-28 03:21:45,170 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-28 03:21:45,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:21:45,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-28 03:21:45,172 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:21:45,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:21:45,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:21:45,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:21:45,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:21:45,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:21:45,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:21:45,523 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:21:45,523 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-28 03:21:45,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:45 BoogieIcfgContainer [2020-11-28 03:21:45,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:21:45,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:21:45,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:21:45,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:21:45,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:21:44" (1/3) ... [2020-11-28 03:21:45,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d706a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:21:45, skipping insertion in model container [2020-11-28 03:21:45,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:45" (2/3) ... [2020-11-28 03:21:45,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d706a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:21:45, skipping insertion in model container [2020-11-28 03:21:45,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:45" (3/3) ... [2020-11-28 03:21:45,560 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-11-28 03:21:45,581 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:21:45,585 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:21:45,597 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:21:45,618 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:21:45,618 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:21:45,619 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:21:45,619 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:21:45,619 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:21:45,619 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:21:45,619 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:21:45,619 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:21:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-28 03:21:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:21:45,639 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:45,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:45,640 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:45,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:45,646 INFO L82 PathProgramCache]: Analyzing trace with hash -533984572, now seen corresponding path program 1 times [2020-11-28 03:21:45,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:45,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053832793] [2020-11-28 03:21:45,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:45,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:45,913 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 03:21:45,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053832793] [2020-11-28 03:21:45,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:45,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:21:45,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378149357] [2020-11-28 03:21:45,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:21:45,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:45,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:21:45,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:21:45,946 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-11-28 03:21:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:46,000 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2020-11-28 03:21:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:21:46,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-28 03:21:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:46,023 INFO L225 Difference]: With dead ends: 40 [2020-11-28 03:21:46,030 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 03:21:46,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 03:21:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 03:21:46,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-28 03:21:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-28 03:21:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2020-11-28 03:21:46,080 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 9 [2020-11-28 03:21:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:46,081 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 58 transitions. [2020-11-28 03:21:46,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:21:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 58 transitions. [2020-11-28 03:21:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:21:46,083 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:46,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:46,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:21:46,084 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:46,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1669689353, now seen corresponding path program 1 times [2020-11-28 03:21:46,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:46,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205657297] [2020-11-28 03:21:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:46,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:46,279 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 03:21:46,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205657297] [2020-11-28 03:21:46,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:46,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:46,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721624412] [2020-11-28 03:21:46,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:46,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:46,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:46,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:46,283 INFO L87 Difference]: Start difference. First operand 35 states and 58 transitions. Second operand 4 states. [2020-11-28 03:21:46,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:46,513 INFO L93 Difference]: Finished difference Result 61 states and 106 transitions. [2020-11-28 03:21:46,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:46,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-28 03:21:46,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:46,516 INFO L225 Difference]: With dead ends: 61 [2020-11-28 03:21:46,516 INFO L226 Difference]: Without dead ends: 61 [2020-11-28 03:21:46,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-28 03:21:46,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2020-11-28 03:21:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 03:21:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 75 transitions. [2020-11-28 03:21:46,531 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 75 transitions. Word has length 20 [2020-11-28 03:21:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:46,532 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 75 transitions. [2020-11-28 03:21:46,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 75 transitions. [2020-11-28 03:21:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:21:46,534 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:46,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:46,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:21:46,534 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:46,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:46,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1411523915, now seen corresponding path program 1 times [2020-11-28 03:21:46,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:46,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579151132] [2020-11-28 03:21:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:46,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:46,680 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 03:21:46,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579151132] [2020-11-28 03:21:46,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:46,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:46,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247557725] [2020-11-28 03:21:46,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:46,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:46,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:46,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:46,687 INFO L87 Difference]: Start difference. First operand 44 states and 75 transitions. Second operand 4 states. [2020-11-28 03:21:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:46,919 INFO L93 Difference]: Finished difference Result 61 states and 104 transitions. [2020-11-28 03:21:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:46,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-28 03:21:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:46,922 INFO L225 Difference]: With dead ends: 61 [2020-11-28 03:21:46,923 INFO L226 Difference]: Without dead ends: 61 [2020-11-28 03:21:46,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-28 03:21:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-11-28 03:21:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-28 03:21:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 103 transitions. [2020-11-28 03:21:46,941 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 103 transitions. Word has length 20 [2020-11-28 03:21:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:46,941 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 103 transitions. [2020-11-28 03:21:46,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 103 transitions. [2020-11-28 03:21:46,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:21:46,943 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:46,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:46,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:21:46,943 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:46,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:46,944 INFO L82 PathProgramCache]: Analyzing trace with hash -214134839, now seen corresponding path program 1 times [2020-11-28 03:21:46,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:46,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086327485] [2020-11-28 03:21:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:47,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:47,040 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 03:21:47,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086327485] [2020-11-28 03:21:47,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:47,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:47,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879519185] [2020-11-28 03:21:47,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:47,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:47,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:47,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:47,042 INFO L87 Difference]: Start difference. First operand 60 states and 103 transitions. Second operand 4 states. [2020-11-28 03:21:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:47,207 INFO L93 Difference]: Finished difference Result 64 states and 106 transitions. [2020-11-28 03:21:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:47,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-28 03:21:47,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:47,209 INFO L225 Difference]: With dead ends: 64 [2020-11-28 03:21:47,209 INFO L226 Difference]: Without dead ends: 64 [2020-11-28 03:21:47,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:47,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-28 03:21:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-11-28 03:21:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-28 03:21:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 105 transitions. [2020-11-28 03:21:47,223 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 105 transitions. Word has length 21 [2020-11-28 03:21:47,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:47,224 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 105 transitions. [2020-11-28 03:21:47,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:47,224 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 105 transitions. [2020-11-28 03:21:47,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:21:47,225 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:47,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:47,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:21:47,225 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:47,226 INFO L82 PathProgramCache]: Analyzing trace with hash -800940853, now seen corresponding path program 1 times [2020-11-28 03:21:47,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:47,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127772027] [2020-11-28 03:21:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:47,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:47,337 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 03:21:47,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127772027] [2020-11-28 03:21:47,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:47,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:47,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602608517] [2020-11-28 03:21:47,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:47,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:47,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:47,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:47,341 INFO L87 Difference]: Start difference. First operand 63 states and 105 transitions. Second operand 4 states. [2020-11-28 03:21:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:47,501 INFO L93 Difference]: Finished difference Result 113 states and 191 transitions. [2020-11-28 03:21:47,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:47,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-28 03:21:47,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:47,503 INFO L225 Difference]: With dead ends: 113 [2020-11-28 03:21:47,504 INFO L226 Difference]: Without dead ends: 113 [2020-11-28 03:21:47,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:47,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-28 03:21:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-11-28 03:21:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-28 03:21:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 190 transitions. [2020-11-28 03:21:47,519 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 190 transitions. Word has length 21 [2020-11-28 03:21:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:47,520 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 190 transitions. [2020-11-28 03:21:47,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 190 transitions. [2020-11-28 03:21:47,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:21:47,521 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:47,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:47,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:21:47,522 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:47,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:47,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1059106291, now seen corresponding path program 1 times [2020-11-28 03:21:47,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:47,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510681512] [2020-11-28 03:21:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:47,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:47,597 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 03:21:47,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510681512] [2020-11-28 03:21:47,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:47,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:47,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879670516] [2020-11-28 03:21:47,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:47,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:47,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:47,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:47,605 INFO L87 Difference]: Start difference. First operand 112 states and 190 transitions. Second operand 4 states. [2020-11-28 03:21:47,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:47,764 INFO L93 Difference]: Finished difference Result 141 states and 241 transitions. [2020-11-28 03:21:47,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:47,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-28 03:21:47,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:47,767 INFO L225 Difference]: With dead ends: 141 [2020-11-28 03:21:47,767 INFO L226 Difference]: Without dead ends: 141 [2020-11-28 03:21:47,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-28 03:21:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 112. [2020-11-28 03:21:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-28 03:21:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 188 transitions. [2020-11-28 03:21:47,786 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 188 transitions. Word has length 21 [2020-11-28 03:21:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:47,786 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 188 transitions. [2020-11-28 03:21:47,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:47,787 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 188 transitions. [2020-11-28 03:21:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:21:47,788 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:47,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:47,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 03:21:47,789 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash 947275456, now seen corresponding path program 1 times [2020-11-28 03:21:47,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:47,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523126757] [2020-11-28 03:21:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:47,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:47,847 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 03:21:47,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523126757] [2020-11-28 03:21:47,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:47,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:47,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058091606] [2020-11-28 03:21:47,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:47,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:47,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:47,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:47,849 INFO L87 Difference]: Start difference. First operand 112 states and 188 transitions. Second operand 4 states. [2020-11-28 03:21:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:47,995 INFO L93 Difference]: Finished difference Result 201 states and 343 transitions. [2020-11-28 03:21:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:47,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-28 03:21:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:47,998 INFO L225 Difference]: With dead ends: 201 [2020-11-28 03:21:47,998 INFO L226 Difference]: Without dead ends: 201 [2020-11-28 03:21:47,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-28 03:21:48,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2020-11-28 03:21:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-28 03:21:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 254 transitions. [2020-11-28 03:21:48,029 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 254 transitions. Word has length 22 [2020-11-28 03:21:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:48,030 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 254 transitions. [2020-11-28 03:21:48,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 254 transitions. [2020-11-28 03:21:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:21:48,034 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:48,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:48,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 03:21:48,035 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:48,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1205440894, now seen corresponding path program 1 times [2020-11-28 03:21:48,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:48,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831311184] [2020-11-28 03:21:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:48,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:48,110 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 03:21:48,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831311184] [2020-11-28 03:21:48,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:48,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:48,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475126508] [2020-11-28 03:21:48,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:48,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:48,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:48,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:48,112 INFO L87 Difference]: Start difference. First operand 152 states and 254 transitions. Second operand 4 states. [2020-11-28 03:21:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:48,281 INFO L93 Difference]: Finished difference Result 209 states and 345 transitions. [2020-11-28 03:21:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:48,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-28 03:21:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:48,284 INFO L225 Difference]: With dead ends: 209 [2020-11-28 03:21:48,284 INFO L226 Difference]: Without dead ends: 209 [2020-11-28 03:21:48,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-28 03:21:48,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2020-11-28 03:21:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-11-28 03:21:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 344 transitions. [2020-11-28 03:21:48,303 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 344 transitions. Word has length 22 [2020-11-28 03:21:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:48,303 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 344 transitions. [2020-11-28 03:21:48,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 344 transitions. [2020-11-28 03:21:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:21:48,305 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:48,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:48,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 03:21:48,306 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:48,306 INFO L82 PathProgramCache]: Analyzing trace with hash -692583242, now seen corresponding path program 1 times [2020-11-28 03:21:48,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:48,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459954432] [2020-11-28 03:21:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:48,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:48,383 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 03:21:48,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459954432] [2020-11-28 03:21:48,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:48,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:48,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581627025] [2020-11-28 03:21:48,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:48,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:48,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:48,392 INFO L87 Difference]: Start difference. First operand 208 states and 344 transitions. Second operand 4 states. [2020-11-28 03:21:48,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:48,515 INFO L93 Difference]: Finished difference Result 215 states and 349 transitions. [2020-11-28 03:21:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:48,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-28 03:21:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:48,518 INFO L225 Difference]: With dead ends: 215 [2020-11-28 03:21:48,518 INFO L226 Difference]: Without dead ends: 215 [2020-11-28 03:21:48,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:48,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-11-28 03:21:48,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2020-11-28 03:21:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-28 03:21:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 348 transitions. [2020-11-28 03:21:48,529 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 348 transitions. Word has length 23 [2020-11-28 03:21:48,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:48,529 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 348 transitions. [2020-11-28 03:21:48,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 348 transitions. [2020-11-28 03:21:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:21:48,531 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:48,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:48,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 03:21:48,531 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:48,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:48,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1279389256, now seen corresponding path program 1 times [2020-11-28 03:21:48,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:48,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611300635] [2020-11-28 03:21:48,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:48,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:48,600 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 03:21:48,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611300635] [2020-11-28 03:21:48,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:48,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:48,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039126460] [2020-11-28 03:21:48,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:48,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:48,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:48,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:48,603 INFO L87 Difference]: Start difference. First operand 214 states and 348 transitions. Second operand 4 states. [2020-11-28 03:21:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:48,753 INFO L93 Difference]: Finished difference Result 379 states and 621 transitions. [2020-11-28 03:21:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:48,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-28 03:21:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:48,757 INFO L225 Difference]: With dead ends: 379 [2020-11-28 03:21:48,757 INFO L226 Difference]: Without dead ends: 379 [2020-11-28 03:21:48,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-11-28 03:21:48,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 298. [2020-11-28 03:21:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-11-28 03:21:48,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 476 transitions. [2020-11-28 03:21:48,771 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 476 transitions. Word has length 23 [2020-11-28 03:21:48,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:48,772 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 476 transitions. [2020-11-28 03:21:48,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 476 transitions. [2020-11-28 03:21:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:21:48,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:48,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:48,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 03:21:48,784 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:48,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:48,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1021223818, now seen corresponding path program 1 times [2020-11-28 03:21:48,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:48,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949546760] [2020-11-28 03:21:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:48,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:48,874 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 03:21:48,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949546760] [2020-11-28 03:21:48,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:48,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:48,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16215762] [2020-11-28 03:21:48,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:48,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:48,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:48,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:48,876 INFO L87 Difference]: Start difference. First operand 298 states and 476 transitions. Second operand 4 states. [2020-11-28 03:21:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:49,005 INFO L93 Difference]: Finished difference Result 403 states and 633 transitions. [2020-11-28 03:21:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:49,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-28 03:21:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:49,009 INFO L225 Difference]: With dead ends: 403 [2020-11-28 03:21:49,009 INFO L226 Difference]: Without dead ends: 403 [2020-11-28 03:21:49,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-11-28 03:21:49,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 402. [2020-11-28 03:21:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-11-28 03:21:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 632 transitions. [2020-11-28 03:21:49,024 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 632 transitions. Word has length 23 [2020-11-28 03:21:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:49,024 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 632 transitions. [2020-11-28 03:21:49,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 632 transitions. [2020-11-28 03:21:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:21:49,026 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:49,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:49,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 03:21:49,026 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:49,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:49,027 INFO L82 PathProgramCache]: Analyzing trace with hash -999702007, now seen corresponding path program 1 times [2020-11-28 03:21:49,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:49,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939196642] [2020-11-28 03:21:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:49,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:49,089 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 03:21:49,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939196642] [2020-11-28 03:21:49,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:49,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:49,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823582935] [2020-11-28 03:21:49,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:49,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:49,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:49,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:49,091 INFO L87 Difference]: Start difference. First operand 402 states and 632 transitions. Second operand 4 states. [2020-11-28 03:21:49,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:49,247 INFO L93 Difference]: Finished difference Result 411 states and 633 transitions. [2020-11-28 03:21:49,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:49,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-28 03:21:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:49,250 INFO L225 Difference]: With dead ends: 411 [2020-11-28 03:21:49,251 INFO L226 Difference]: Without dead ends: 411 [2020-11-28 03:21:49,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:49,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-11-28 03:21:49,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 410. [2020-11-28 03:21:49,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-11-28 03:21:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 632 transitions. [2020-11-28 03:21:49,268 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 632 transitions. Word has length 24 [2020-11-28 03:21:49,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:49,268 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 632 transitions. [2020-11-28 03:21:49,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 632 transitions. [2020-11-28 03:21:49,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:21:49,270 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:49,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:49,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 03:21:49,271 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:49,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:49,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1586508021, now seen corresponding path program 1 times [2020-11-28 03:21:49,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:49,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130319282] [2020-11-28 03:21:49,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:49,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:49,375 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 03:21:49,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130319282] [2020-11-28 03:21:49,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:49,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:49,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340246947] [2020-11-28 03:21:49,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:49,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:49,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:49,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:49,377 INFO L87 Difference]: Start difference. First operand 410 states and 632 transitions. Second operand 4 states. [2020-11-28 03:21:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:49,501 INFO L93 Difference]: Finished difference Result 715 states and 1105 transitions. [2020-11-28 03:21:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:49,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-28 03:21:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:49,506 INFO L225 Difference]: With dead ends: 715 [2020-11-28 03:21:49,506 INFO L226 Difference]: Without dead ends: 715 [2020-11-28 03:21:49,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-11-28 03:21:49,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 586. [2020-11-28 03:21:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-11-28 03:21:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 880 transitions. [2020-11-28 03:21:49,526 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 880 transitions. Word has length 24 [2020-11-28 03:21:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:49,527 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 880 transitions. [2020-11-28 03:21:49,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 880 transitions. [2020-11-28 03:21:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:21:49,528 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:49,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:49,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 03:21:49,529 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:49,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1328342583, now seen corresponding path program 1 times [2020-11-28 03:21:49,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:49,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881507661] [2020-11-28 03:21:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:49,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:49,575 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 03:21:49,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881507661] [2020-11-28 03:21:49,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:49,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:49,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652296020] [2020-11-28 03:21:49,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:49,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:49,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:49,577 INFO L87 Difference]: Start difference. First operand 586 states and 880 transitions. Second operand 4 states. [2020-11-28 03:21:49,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:49,698 INFO L93 Difference]: Finished difference Result 779 states and 1145 transitions. [2020-11-28 03:21:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:49,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-28 03:21:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:49,703 INFO L225 Difference]: With dead ends: 779 [2020-11-28 03:21:49,704 INFO L226 Difference]: Without dead ends: 779 [2020-11-28 03:21:49,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-11-28 03:21:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 778. [2020-11-28 03:21:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-11-28 03:21:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1144 transitions. [2020-11-28 03:21:49,726 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1144 transitions. Word has length 24 [2020-11-28 03:21:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:49,726 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1144 transitions. [2020-11-28 03:21:49,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:49,727 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1144 transitions. [2020-11-28 03:21:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:21:49,728 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:49,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:49,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 03:21:49,728 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:49,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:49,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1930438559, now seen corresponding path program 1 times [2020-11-28 03:21:49,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:49,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589530448] [2020-11-28 03:21:49,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:49,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:49,800 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 03:21:49,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589530448] [2020-11-28 03:21:49,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:49,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:49,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012933539] [2020-11-28 03:21:49,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:49,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:49,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:49,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:49,802 INFO L87 Difference]: Start difference. First operand 778 states and 1144 transitions. Second operand 4 states. [2020-11-28 03:21:49,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:49,932 INFO L93 Difference]: Finished difference Result 795 states and 1145 transitions. [2020-11-28 03:21:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:49,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-28 03:21:49,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:49,938 INFO L225 Difference]: With dead ends: 795 [2020-11-28 03:21:49,938 INFO L226 Difference]: Without dead ends: 795 [2020-11-28 03:21:49,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-11-28 03:21:49,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 794. [2020-11-28 03:21:49,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-11-28 03:21:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1144 transitions. [2020-11-28 03:21:49,965 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1144 transitions. Word has length 25 [2020-11-28 03:21:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:49,966 INFO L481 AbstractCegarLoop]: Abstraction has 794 states and 1144 transitions. [2020-11-28 03:21:49,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1144 transitions. [2020-11-28 03:21:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:21:49,968 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:49,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:49,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-28 03:21:49,969 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:49,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1777722723, now seen corresponding path program 1 times [2020-11-28 03:21:49,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:49,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375534357] [2020-11-28 03:21:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:50,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:50,025 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 03:21:50,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375534357] [2020-11-28 03:21:50,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:50,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:50,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823096963] [2020-11-28 03:21:50,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:50,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:50,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:50,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:50,027 INFO L87 Difference]: Start difference. First operand 794 states and 1144 transitions. Second operand 4 states. [2020-11-28 03:21:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:50,151 INFO L93 Difference]: Finished difference Result 1355 states and 1945 transitions. [2020-11-28 03:21:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:50,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-28 03:21:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:50,159 INFO L225 Difference]: With dead ends: 1355 [2020-11-28 03:21:50,160 INFO L226 Difference]: Without dead ends: 1355 [2020-11-28 03:21:50,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:50,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-11-28 03:21:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1162. [2020-11-28 03:21:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-11-28 03:21:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1624 transitions. [2020-11-28 03:21:50,205 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1624 transitions. Word has length 25 [2020-11-28 03:21:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:50,205 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1624 transitions. [2020-11-28 03:21:50,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1624 transitions. [2020-11-28 03:21:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:21:50,208 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:50,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:50,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-28 03:21:50,209 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:50,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2035888161, now seen corresponding path program 1 times [2020-11-28 03:21:50,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:50,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621012568] [2020-11-28 03:21:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:50,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:50,285 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 03:21:50,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621012568] [2020-11-28 03:21:50,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:50,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:50,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327504038] [2020-11-28 03:21:50,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:50,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:50,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:50,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:50,300 INFO L87 Difference]: Start difference. First operand 1162 states and 1624 transitions. Second operand 4 states. [2020-11-28 03:21:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:50,439 INFO L93 Difference]: Finished difference Result 1515 states and 2057 transitions. [2020-11-28 03:21:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:50,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-28 03:21:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:50,448 INFO L225 Difference]: With dead ends: 1515 [2020-11-28 03:21:50,448 INFO L226 Difference]: Without dead ends: 1515 [2020-11-28 03:21:50,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:50,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2020-11-28 03:21:50,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1514. [2020-11-28 03:21:50,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2020-11-28 03:21:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2056 transitions. [2020-11-28 03:21:50,491 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2056 transitions. Word has length 25 [2020-11-28 03:21:50,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:50,492 INFO L481 AbstractCegarLoop]: Abstraction has 1514 states and 2056 transitions. [2020-11-28 03:21:50,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:50,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2056 transitions. [2020-11-28 03:21:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:21:50,494 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:50,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:50,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-28 03:21:50,495 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:50,496 INFO L82 PathProgramCache]: Analyzing trace with hash -718490028, now seen corresponding path program 1 times [2020-11-28 03:21:50,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:50,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782346114] [2020-11-28 03:21:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:50,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:50,547 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 03:21:50,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782346114] [2020-11-28 03:21:50,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:50,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:50,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703621424] [2020-11-28 03:21:50,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:50,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:50,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:50,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:50,550 INFO L87 Difference]: Start difference. First operand 1514 states and 2056 transitions. Second operand 4 states. [2020-11-28 03:21:50,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:50,673 INFO L93 Difference]: Finished difference Result 1547 states and 2057 transitions. [2020-11-28 03:21:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:50,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-28 03:21:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:50,682 INFO L225 Difference]: With dead ends: 1547 [2020-11-28 03:21:50,682 INFO L226 Difference]: Without dead ends: 1547 [2020-11-28 03:21:50,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:50,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-11-28 03:21:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1546. [2020-11-28 03:21:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-11-28 03:21:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2056 transitions. [2020-11-28 03:21:50,749 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2056 transitions. Word has length 26 [2020-11-28 03:21:50,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:50,750 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 2056 transitions. [2020-11-28 03:21:50,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2056 transitions. [2020-11-28 03:21:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:21:50,752 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:50,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:50,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-28 03:21:50,753 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:50,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1305296042, now seen corresponding path program 1 times [2020-11-28 03:21:50,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:50,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337719256] [2020-11-28 03:21:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:50,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:50,814 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 03:21:50,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337719256] [2020-11-28 03:21:50,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:50,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:50,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30670524] [2020-11-28 03:21:50,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:50,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:50,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:50,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:50,816 INFO L87 Difference]: Start difference. First operand 1546 states and 2056 transitions. Second operand 4 states. [2020-11-28 03:21:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:50,950 INFO L93 Difference]: Finished difference Result 2571 states and 3369 transitions. [2020-11-28 03:21:50,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:50,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-28 03:21:50,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:50,963 INFO L225 Difference]: With dead ends: 2571 [2020-11-28 03:21:50,963 INFO L226 Difference]: Without dead ends: 2571 [2020-11-28 03:21:50,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2020-11-28 03:21:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2314. [2020-11-28 03:21:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-11-28 03:21:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 2984 transitions. [2020-11-28 03:21:51,025 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 2984 transitions. Word has length 26 [2020-11-28 03:21:51,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:51,025 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 2984 transitions. [2020-11-28 03:21:51,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 2984 transitions. [2020-11-28 03:21:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:21:51,029 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:51,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:51,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-28 03:21:51,030 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:51,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:51,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1047130604, now seen corresponding path program 1 times [2020-11-28 03:21:51,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:51,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389840111] [2020-11-28 03:21:51,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:51,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:51,094 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 03:21:51,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389840111] [2020-11-28 03:21:51,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:51,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:51,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536910811] [2020-11-28 03:21:51,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:51,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:51,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:51,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:51,097 INFO L87 Difference]: Start difference. First operand 2314 states and 2984 transitions. Second operand 4 states. [2020-11-28 03:21:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:51,248 INFO L93 Difference]: Finished difference Result 2955 states and 3657 transitions. [2020-11-28 03:21:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:51,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-28 03:21:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:51,263 INFO L225 Difference]: With dead ends: 2955 [2020-11-28 03:21:51,263 INFO L226 Difference]: Without dead ends: 2955 [2020-11-28 03:21:51,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2020-11-28 03:21:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2954. [2020-11-28 03:21:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2954 states. [2020-11-28 03:21:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 3656 transitions. [2020-11-28 03:21:51,342 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 3656 transitions. Word has length 26 [2020-11-28 03:21:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:51,342 INFO L481 AbstractCegarLoop]: Abstraction has 2954 states and 3656 transitions. [2020-11-28 03:21:51,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:51,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 3656 transitions. [2020-11-28 03:21:51,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:21:51,346 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:51,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:51,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-28 03:21:51,348 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:51,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:51,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1802780660, now seen corresponding path program 1 times [2020-11-28 03:21:51,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:51,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962464897] [2020-11-28 03:21:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:51,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:51,397 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 03:21:51,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962464897] [2020-11-28 03:21:51,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:51,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:51,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27465475] [2020-11-28 03:21:51,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:51,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:51,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:51,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:51,399 INFO L87 Difference]: Start difference. First operand 2954 states and 3656 transitions. Second operand 4 states. [2020-11-28 03:21:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:51,529 INFO L93 Difference]: Finished difference Result 3019 states and 3657 transitions. [2020-11-28 03:21:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:51,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-28 03:21:51,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:51,543 INFO L225 Difference]: With dead ends: 3019 [2020-11-28 03:21:51,543 INFO L226 Difference]: Without dead ends: 3019 [2020-11-28 03:21:51,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2020-11-28 03:21:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3018. [2020-11-28 03:21:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3018 states. [2020-11-28 03:21:51,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 3656 transitions. [2020-11-28 03:21:51,620 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 3656 transitions. Word has length 27 [2020-11-28 03:21:51,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:51,620 INFO L481 AbstractCegarLoop]: Abstraction has 3018 states and 3656 transitions. [2020-11-28 03:21:51,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:51,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 3656 transitions. [2020-11-28 03:21:51,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:21:51,625 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:51,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:51,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-28 03:21:51,625 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:51,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:51,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1905380622, now seen corresponding path program 1 times [2020-11-28 03:21:51,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:51,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067275502] [2020-11-28 03:21:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:51,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:51,672 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 03:21:51,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067275502] [2020-11-28 03:21:51,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:51,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:51,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804159362] [2020-11-28 03:21:51,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:51,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:51,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:51,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:51,674 INFO L87 Difference]: Start difference. First operand 3018 states and 3656 transitions. Second operand 4 states. [2020-11-28 03:21:51,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:51,789 INFO L93 Difference]: Finished difference Result 4874 states and 5704 transitions. [2020-11-28 03:21:51,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:51,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-28 03:21:51,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:51,812 INFO L225 Difference]: With dead ends: 4874 [2020-11-28 03:21:51,812 INFO L226 Difference]: Without dead ends: 4874 [2020-11-28 03:21:51,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:51,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2020-11-28 03:21:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 4618. [2020-11-28 03:21:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4618 states. [2020-11-28 03:21:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 5448 transitions. [2020-11-28 03:21:51,952 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 5448 transitions. Word has length 27 [2020-11-28 03:21:51,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:51,952 INFO L481 AbstractCegarLoop]: Abstraction has 4618 states and 5448 transitions. [2020-11-28 03:21:51,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 5448 transitions. [2020-11-28 03:21:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:21:51,961 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:51,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:51,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-28 03:21:51,962 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:51,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:51,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2131421236, now seen corresponding path program 1 times [2020-11-28 03:21:51,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:51,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345711198] [2020-11-28 03:21:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:52,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:52,016 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 03:21:52,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345711198] [2020-11-28 03:21:52,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:52,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:52,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176086595] [2020-11-28 03:21:52,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:52,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:52,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:52,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:52,024 INFO L87 Difference]: Start difference. First operand 4618 states and 5448 transitions. Second operand 4 states. [2020-11-28 03:21:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:52,155 INFO L93 Difference]: Finished difference Result 5767 states and 6406 transitions. [2020-11-28 03:21:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:52,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-28 03:21:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:52,156 INFO L225 Difference]: With dead ends: 5767 [2020-11-28 03:21:52,156 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:21:52,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:21:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:21:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:21:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:21:52,157 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-11-28 03:21:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:52,157 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:21:52,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:52,157 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:21:52,157 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:21:52,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-28 03:21:52,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:21:52 BoogieIcfgContainer [2020-11-28 03:21:52,169 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:21:52,170 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:21:52,170 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:21:52,171 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:21:52,171 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:45" (3/4) ... [2020-11-28 03:21:52,174 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:21:52,181 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-11-28 03:21:52,181 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-28 03:21:52,181 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-28 03:21:52,192 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-28 03:21:52,193 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:21:52,193 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 03:21:52,194 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:21:52,252 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c70473c2-3011-492a-9c5a-bbe7dabd4f46/bin/uautomizer/witness.graphml [2020-11-28 03:21:52,253 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:21:52,255 INFO L168 Benchmark]: Toolchain (without parser) took 7481.53 ms. Allocated memory was 98.6 MB in the beginning and 188.7 MB in the end (delta: 90.2 MB). Free memory was 67.3 MB in the beginning and 109.3 MB in the end (delta: -41.9 MB). Peak memory consumption was 46.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:52,255 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 71.3 MB. Free memory was 33.6 MB in the beginning and 33.6 MB in the end (delta: 33.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:52,256 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.14 ms. Allocated memory is still 98.6 MB. Free memory was 67.2 MB in the beginning and 76.2 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:52,256 INFO L168 Benchmark]: Boogie Preprocessor took 39.47 ms. Allocated memory is still 98.6 MB. Free memory was 76.2 MB in the beginning and 74.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:52,257 INFO L168 Benchmark]: RCFGBuilder took 426.28 ms. Allocated memory is still 98.6 MB. Free memory was 74.1 MB in the beginning and 55.2 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:52,257 INFO L168 Benchmark]: TraceAbstraction took 6627.14 ms. Allocated memory was 98.6 MB in the beginning and 188.7 MB in the end (delta: 90.2 MB). Free memory was 55.2 MB in the beginning and 113.5 MB in the end (delta: -58.3 MB). Peak memory consumption was 35.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:52,258 INFO L168 Benchmark]: Witness Printer took 82.57 ms. Allocated memory is still 188.7 MB. Free memory was 113.5 MB in the beginning and 109.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:52,259 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 71.3 MB. Free memory was 33.6 MB in the beginning and 33.6 MB in the end (delta: 33.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 284.14 ms. Allocated memory is still 98.6 MB. Free memory was 67.2 MB in the beginning and 76.2 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.47 ms. Allocated memory is still 98.6 MB. Free memory was 76.2 MB in the beginning and 74.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 426.28 ms. Allocated memory is still 98.6 MB. Free memory was 74.1 MB in the beginning and 55.2 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6627.14 ms. Allocated memory was 98.6 MB in the beginning and 188.7 MB in the end (delta: 90.2 MB). Free memory was 55.2 MB in the beginning and 113.5 MB in the end (delta: -58.3 MB). Peak memory consumption was 35.0 MB. Max. memory is 16.1 GB. * Witness Printer took 82.57 ms. Allocated memory is still 188.7 MB. Free memory was 113.5 MB in the beginning and 109.3 MB in the end (delta: 4.2 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 4 procedures, 44 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.5s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1616 SDtfs, 2261 SDslu, 170 SDs, 0 SdLazy, 1123 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4618occurred in iteration=22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 23 MinimizatonAttempts, 1024 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 531 NumberOfCodeBlocks, 531 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 508 ConstructedInterpolants, 0 QuantifiedInterpolants, 36258 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...