./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_12.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_a5ae8179-e426-46cd-80a9-7ae887990f42/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_12.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/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 fbb7e06bf350f46f725ea0ddc5d1215829061b3a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 03:19:52,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:19:52,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:19:52,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:19:52,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:19:52,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:19:52,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:19:52,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:19:52,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:19:52,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:19:52,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:19:52,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:19:52,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:19:52,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:19:52,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:19:52,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:19:52,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:19:52,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:19:52,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:19:52,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:19:52,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:19:52,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:19:52,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:19:52,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:19:52,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:19:52,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:19:52,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:19:52,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:19:52,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:19:52,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:19:52,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:19:52,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:19:52,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:19:52,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:19:52,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:19:52,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:19:52,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:19:52,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:19:52,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:19:52,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:19:52,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:19:52,262 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:19:52,308 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:19:52,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:19:52,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:19:52,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:19:52,311 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:19:52,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:19:52,312 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:19:52,312 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:19:52,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:19:52,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:19:52,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:19:52,314 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:19:52,314 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:19:52,314 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:19:52,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:19:52,315 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:19:52,315 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:19:52,315 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:19:52,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:19:52,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:19:52,316 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:19:52,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:19:52,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:19:52,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:19:52,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:19:52,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:19:52,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:19:52,318 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:19:52,318 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_a5ae8179-e426-46cd-80a9-7ae887990f42/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbb7e06bf350f46f725ea0ddc5d1215829061b3a [2020-11-28 03:19:52,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:19:52,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:19:52,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:19:52,736 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:19:52,739 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:19:52,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/bin/uautomizer/../../sv-benchmarks/c/locks/test_locks_12.c [2020-11-28 03:19:52,842 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/bin/uautomizer/data/dbba7e4c1/498fe2dedd214f0a94765d04de929690/FLAG5a12bc254 [2020-11-28 03:19:53,533 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:19:53,534 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/sv-benchmarks/c/locks/test_locks_12.c [2020-11-28 03:19:53,548 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/bin/uautomizer/data/dbba7e4c1/498fe2dedd214f0a94765d04de929690/FLAG5a12bc254 [2020-11-28 03:19:53,874 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/bin/uautomizer/data/dbba7e4c1/498fe2dedd214f0a94765d04de929690 [2020-11-28 03:19:53,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:19:53,879 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:19:53,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:19:53,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:19:53,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:19:53,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:19:53" (1/1) ... [2020-11-28 03:19:53,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e6d441d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:53, skipping insertion in model container [2020-11-28 03:19:53,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:19:53" (1/1) ... [2020-11-28 03:19:53,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:19:53,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:19:54,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:19:54,188 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:19:54,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:19:54,238 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:19:54,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:54 WrapperNode [2020-11-28 03:19:54,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:19:54,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:19:54,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:19:54,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:19:54,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:54" (1/1) ... [2020-11-28 03:19:54,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:54" (1/1) ... [2020-11-28 03:19:54,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:54" (1/1) ... [2020-11-28 03:19:54,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:54" (1/1) ... [2020-11-28 03:19:54,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:54" (1/1) ... [2020-11-28 03:19:54,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:54" (1/1) ... [2020-11-28 03:19:54,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:54" (1/1) ... [2020-11-28 03:19:54,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:19:54,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:19:54,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:19:54,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:19:54,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/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 03:19:54,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:19:54,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:19:54,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-28 03:19:54,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:19:54,405 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-28 03:19:54,405 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-28 03:19:54,406 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-28 03:19:54,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:19:54,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-28 03:19:54,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:19:54,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:19:54,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:19:54,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:19:54,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:19:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:19:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:19:55,022 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:19:55,027 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-28 03:19:55,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:55 BoogieIcfgContainer [2020-11-28 03:19:55,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:19:55,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:19:55,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:19:55,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:19:55,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:19:53" (1/3) ... [2020-11-28 03:19:55,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77549017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:19:55, skipping insertion in model container [2020-11-28 03:19:55,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:54" (2/3) ... [2020-11-28 03:19:55,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77549017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:19:55, skipping insertion in model container [2020-11-28 03:19:55,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:55" (3/3) ... [2020-11-28 03:19:55,041 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2020-11-28 03:19:55,054 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:19:55,060 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:19:55,074 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:19:55,109 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:19:55,109 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:19:55,109 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:19:55,110 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:19:55,110 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:19:55,110 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:19:55,110 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:19:55,111 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:19:55,134 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-11-28 03:19:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:19:55,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:55,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:55,148 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:19:55,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:55,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1172154548, now seen corresponding path program 1 times [2020-11-28 03:19:55,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:55,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613222783] [2020-11-28 03:19:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:55,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:19:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:55,514 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 03:19:55,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613222783] [2020-11-28 03:19:55,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:55,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:19:55,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260158960] [2020-11-28 03:19:55,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:19:55,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:55,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:19:55,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:19:55,552 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-11-28 03:19:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:55,616 INFO L93 Difference]: Finished difference Result 52 states and 87 transitions. [2020-11-28 03:19:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:19:55,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-28 03:19:55,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:55,640 INFO L225 Difference]: With dead ends: 52 [2020-11-28 03:19:55,650 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 03:19:55,652 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 03:19:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 03:19:55,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-28 03:19:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-28 03:19:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 82 transitions. [2020-11-28 03:19:55,708 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 82 transitions. Word has length 9 [2020-11-28 03:19:55,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:55,710 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 82 transitions. [2020-11-28 03:19:55,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:19:55,711 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 82 transitions. [2020-11-28 03:19:55,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:19:55,712 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:55,713 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 03:19:55,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:19:55,713 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:19:55,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:55,740 INFO L82 PathProgramCache]: Analyzing trace with hash 120209725, now seen corresponding path program 1 times [2020-11-28 03:19:55,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:55,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063920823] [2020-11-28 03:19:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:55,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:19:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:55,917 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 03:19:55,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063920823] [2020-11-28 03:19:55,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:55,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:19:55,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159619546] [2020-11-28 03:19:55,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:19:55,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:55,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:19:55,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:55,921 INFO L87 Difference]: Start difference. First operand 47 states and 82 transitions. Second operand 4 states. [2020-11-28 03:19:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:56,249 INFO L93 Difference]: Finished difference Result 85 states and 154 transitions. [2020-11-28 03:19:56,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:19:56,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-28 03:19:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:56,252 INFO L225 Difference]: With dead ends: 85 [2020-11-28 03:19:56,252 INFO L226 Difference]: Without dead ends: 85 [2020-11-28 03:19:56,253 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 03:19:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-28 03:19:56,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2020-11-28 03:19:56,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-28 03:19:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 107 transitions. [2020-11-28 03:19:56,274 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 107 transitions. Word has length 24 [2020-11-28 03:19:56,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:56,274 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 107 transitions. [2020-11-28 03:19:56,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:19:56,274 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 107 transitions. [2020-11-28 03:19:56,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:19:56,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:56,276 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 03:19:56,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:19:56,276 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:19:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:56,277 INFO L82 PathProgramCache]: Analyzing trace with hash -900858629, now seen corresponding path program 1 times [2020-11-28 03:19:56,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:56,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819947122] [2020-11-28 03:19:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:56,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:19:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:56,411 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 03:19:56,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819947122] [2020-11-28 03:19:56,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:56,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:19:56,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715295687] [2020-11-28 03:19:56,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:19:56,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:56,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:19:56,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:56,414 INFO L87 Difference]: Start difference. First operand 60 states and 107 transitions. Second operand 4 states. [2020-11-28 03:19:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:56,762 INFO L93 Difference]: Finished difference Result 85 states and 152 transitions. [2020-11-28 03:19:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:19:56,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-28 03:19:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:56,765 INFO L225 Difference]: With dead ends: 85 [2020-11-28 03:19:56,765 INFO L226 Difference]: Without dead ends: 85 [2020-11-28 03:19:56,765 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 03:19:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-28 03:19:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-11-28 03:19:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-28 03:19:56,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 151 transitions. [2020-11-28 03:19:56,783 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 151 transitions. Word has length 24 [2020-11-28 03:19:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:56,784 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 151 transitions. [2020-11-28 03:19:56,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:19:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 151 transitions. [2020-11-28 03:19:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:19:56,785 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:56,785 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 03:19:56,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:19:56,785 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:19:56,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:56,786 INFO L82 PathProgramCache]: Analyzing trace with hash -561878445, now seen corresponding path program 1 times [2020-11-28 03:19:56,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:56,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291916794] [2020-11-28 03:19:56,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:56,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:19:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:56,935 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 03:19:56,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291916794] [2020-11-28 03:19:56,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:56,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:19:56,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766440941] [2020-11-28 03:19:56,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:19:56,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:56,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:19:56,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:56,938 INFO L87 Difference]: Start difference. First operand 84 states and 151 transitions. Second operand 4 states. [2020-11-28 03:19:57,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:57,225 INFO L93 Difference]: Finished difference Result 88 states and 154 transitions. [2020-11-28 03:19:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:19:57,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-28 03:19:57,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:57,228 INFO L225 Difference]: With dead ends: 88 [2020-11-28 03:19:57,228 INFO L226 Difference]: Without dead ends: 88 [2020-11-28 03:19:57,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:19:57,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-28 03:19:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-11-28 03:19:57,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-28 03:19:57,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 153 transitions. [2020-11-28 03:19:57,247 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 153 transitions. Word has length 25 [2020-11-28 03:19:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:57,248 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 153 transitions. [2020-11-28 03:19:57,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:19:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 153 transitions. [2020-11-28 03:19:57,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:19:57,249 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:57,250 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 03:19:57,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:19:57,250 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:19:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:57,257 INFO L82 PathProgramCache]: Analyzing trace with hash 2144740949, now seen corresponding path program 1 times [2020-11-28 03:19:57,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:57,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644874719] [2020-11-28 03:19:57,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:57,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:19:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:57,363 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 03:19:57,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644874719] [2020-11-28 03:19:57,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:57,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:19:57,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068467521] [2020-11-28 03:19:57,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:19:57,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:57,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:19:57,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:57,366 INFO L87 Difference]: Start difference. First operand 87 states and 153 transitions. Second operand 4 states. [2020-11-28 03:19:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:57,668 INFO L93 Difference]: Finished difference Result 161 states and 287 transitions. [2020-11-28 03:19:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:19:57,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-28 03:19:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:57,672 INFO L225 Difference]: With dead ends: 161 [2020-11-28 03:19:57,672 INFO L226 Difference]: Without dead ends: 161 [2020-11-28 03:19:57,672 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 03:19:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-11-28 03:19:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-11-28 03:19:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-28 03:19:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 286 transitions. [2020-11-28 03:19:57,691 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 286 transitions. Word has length 25 [2020-11-28 03:19:57,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:57,692 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 286 transitions. [2020-11-28 03:19:57,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:19:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 286 transitions. [2020-11-28 03:19:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:19:57,694 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:57,694 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 03:19:57,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:19:57,695 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:19:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1129157993, now seen corresponding path program 1 times [2020-11-28 03:19:57,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:57,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106808211] [2020-11-28 03:19:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:57,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:19:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:57,819 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 03:19:57,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106808211] [2020-11-28 03:19:57,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:57,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:19:57,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222140838] [2020-11-28 03:19:57,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:19:57,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:57,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:19:57,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:57,822 INFO L87 Difference]: Start difference. First operand 160 states and 286 transitions. Second operand 4 states. [2020-11-28 03:19:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:58,121 INFO L93 Difference]: Finished difference Result 205 states and 369 transitions. [2020-11-28 03:19:58,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:19:58,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-28 03:19:58,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:58,125 INFO L225 Difference]: With dead ends: 205 [2020-11-28 03:19:58,125 INFO L226 Difference]: Without dead ends: 205 [2020-11-28 03:19:58,147 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 03:19:58,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-11-28 03:19:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2020-11-28 03:19:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-28 03:19:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 284 transitions. [2020-11-28 03:19:58,173 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 284 transitions. Word has length 25 [2020-11-28 03:19:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:58,174 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 284 transitions. [2020-11-28 03:19:58,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:19:58,174 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 284 transitions. [2020-11-28 03:19:58,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:19:58,176 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:58,176 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 03:19:58,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 03:19:58,177 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:19:58,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:58,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2069057926, now seen corresponding path program 1 times [2020-11-28 03:19:58,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:58,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288995455] [2020-11-28 03:19:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:58,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:19:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:58,302 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 03:19:58,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288995455] [2020-11-28 03:19:58,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:58,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:19:58,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416391824] [2020-11-28 03:19:58,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:19:58,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:58,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:19:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:58,306 INFO L87 Difference]: Start difference. First operand 160 states and 284 transitions. Second operand 4 states. [2020-11-28 03:19:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:58,530 INFO L93 Difference]: Finished difference Result 297 states and 535 transitions. [2020-11-28 03:19:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:19:58,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-28 03:19:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:58,534 INFO L225 Difference]: With dead ends: 297 [2020-11-28 03:19:58,534 INFO L226 Difference]: Without dead ends: 297 [2020-11-28 03:19:58,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:19:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-11-28 03:19:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 216. [2020-11-28 03:19:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-11-28 03:19:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 382 transitions. [2020-11-28 03:19:58,558 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 382 transitions. Word has length 26 [2020-11-28 03:19:58,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:58,559 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 382 transitions. [2020-11-28 03:19:58,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:19:58,559 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 382 transitions. [2020-11-28 03:19:58,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:19:58,561 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:58,561 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 03:19:58,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 03:19:58,562 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:19:58,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:58,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1047989572, now seen corresponding path program 1 times [2020-11-28 03:19:58,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:58,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241134083] [2020-11-28 03:19:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:58,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:19:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:58,684 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 03:19:58,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241134083] [2020-11-28 03:19:58,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:58,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:19:58,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699955684] [2020-11-28 03:19:58,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:19:58,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:58,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:19:58,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:58,691 INFO L87 Difference]: Start difference. First operand 216 states and 382 transitions. Second operand 4 states. [2020-11-28 03:19:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:58,899 INFO L93 Difference]: Finished difference Result 305 states and 537 transitions. [2020-11-28 03:19:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:19:58,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-28 03:19:58,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:58,902 INFO L225 Difference]: With dead ends: 305 [2020-11-28 03:19:58,902 INFO L226 Difference]: Without dead ends: 305 [2020-11-28 03:19:58,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:19:58,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-11-28 03:19:58,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2020-11-28 03:19:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-11-28 03:19:58,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 536 transitions. [2020-11-28 03:19:58,941 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 536 transitions. Word has length 26 [2020-11-28 03:19:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:58,942 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 536 transitions. [2020-11-28 03:19:58,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:19:58,942 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 536 transitions. [2020-11-28 03:19:58,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:19:58,944 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:58,944 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 03:19:58,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 03:19:58,945 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:19:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:58,945 INFO L82 PathProgramCache]: Analyzing trace with hash -277105216, now seen corresponding path program 1 times [2020-11-28 03:19:58,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:58,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961549489] [2020-11-28 03:19:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:59,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:19:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:59,068 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 03:19:59,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961549489] [2020-11-28 03:19:59,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:59,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:19:59,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544095392] [2020-11-28 03:19:59,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:19:59,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:59,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:19:59,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:59,083 INFO L87 Difference]: Start difference. First operand 304 states and 536 transitions. Second operand 4 states. [2020-11-28 03:19:59,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:59,328 INFO L93 Difference]: Finished difference Result 311 states and 541 transitions. [2020-11-28 03:19:59,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:19:59,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-28 03:19:59,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:59,332 INFO L225 Difference]: With dead ends: 311 [2020-11-28 03:19:59,332 INFO L226 Difference]: Without dead ends: 311 [2020-11-28 03:19:59,333 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 03:19:59,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-11-28 03:19:59,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2020-11-28 03:19:59,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-11-28 03:19:59,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 540 transitions. [2020-11-28 03:19:59,354 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 540 transitions. Word has length 27 [2020-11-28 03:19:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:59,355 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 540 transitions. [2020-11-28 03:19:59,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:19:59,355 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 540 transitions. [2020-11-28 03:19:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:19:59,371 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:59,371 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 03:19:59,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 03:19:59,372 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:19:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:59,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1865453118, now seen corresponding path program 1 times [2020-11-28 03:19:59,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:59,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997938186] [2020-11-28 03:19:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:59,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:19:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:59,493 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 03:19:59,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997938186] [2020-11-28 03:19:59,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:59,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:19:59,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061279672] [2020-11-28 03:19:59,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:19:59,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:59,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:19:59,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:59,496 INFO L87 Difference]: Start difference. First operand 310 states and 540 transitions. Second operand 4 states. [2020-11-28 03:19:59,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:59,761 INFO L93 Difference]: Finished difference Result 571 states and 1005 transitions. [2020-11-28 03:19:59,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:19:59,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-28 03:19:59,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:59,766 INFO L225 Difference]: With dead ends: 571 [2020-11-28 03:19:59,766 INFO L226 Difference]: Without dead ends: 571 [2020-11-28 03:19:59,767 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 03:19:59,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-28 03:19:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 426. [2020-11-28 03:19:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-11-28 03:19:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 732 transitions. [2020-11-28 03:19:59,792 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 732 transitions. Word has length 27 [2020-11-28 03:19:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:59,794 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 732 transitions. [2020-11-28 03:19:59,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:19:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 732 transitions. [2020-11-28 03:19:59,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:19:59,799 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:59,800 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 03:19:59,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 03:19:59,800 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:19:59,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:59,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1408445824, now seen corresponding path program 1 times [2020-11-28 03:19:59,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:59,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243294077] [2020-11-28 03:19:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:59,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:19:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:59,922 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 03:19:59,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243294077] [2020-11-28 03:19:59,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:59,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:19:59,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828507266] [2020-11-28 03:19:59,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:19:59,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:59,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:19:59,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:59,927 INFO L87 Difference]: Start difference. First operand 426 states and 732 transitions. Second operand 4 states. [2020-11-28 03:20:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:00,182 INFO L93 Difference]: Finished difference Result 595 states and 1017 transitions. [2020-11-28 03:20:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:00,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-28 03:20:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:00,188 INFO L225 Difference]: With dead ends: 595 [2020-11-28 03:20:00,188 INFO L226 Difference]: Without dead ends: 595 [2020-11-28 03:20:00,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:20:00,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-11-28 03:20:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 594. [2020-11-28 03:20:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 594 states. [2020-11-28 03:20:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1016 transitions. [2020-11-28 03:20:00,213 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1016 transitions. Word has length 27 [2020-11-28 03:20:00,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:00,213 INFO L481 AbstractCegarLoop]: Abstraction has 594 states and 1016 transitions. [2020-11-28 03:20:00,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:00,214 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1016 transitions. [2020-11-28 03:20:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:20:00,216 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:00,216 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, 1] [2020-11-28 03:20:00,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 03:20:00,216 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:00,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:00,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1987852721, now seen corresponding path program 1 times [2020-11-28 03:20:00,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:00,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065581896] [2020-11-28 03:20:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:00,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:00,325 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 03:20:00,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065581896] [2020-11-28 03:20:00,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:00,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:00,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546551177] [2020-11-28 03:20:00,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:00,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:00,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:00,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:00,327 INFO L87 Difference]: Start difference. First operand 594 states and 1016 transitions. Second operand 4 states. [2020-11-28 03:20:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:00,513 INFO L93 Difference]: Finished difference Result 603 states and 1017 transitions. [2020-11-28 03:20:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:00,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-28 03:20:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:00,518 INFO L225 Difference]: With dead ends: 603 [2020-11-28 03:20:00,518 INFO L226 Difference]: Without dead ends: 603 [2020-11-28 03:20:00,518 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 03:20:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-11-28 03:20:00,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 602. [2020-11-28 03:20:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-11-28 03:20:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1016 transitions. [2020-11-28 03:20:00,540 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1016 transitions. Word has length 28 [2020-11-28 03:20:00,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:00,541 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 1016 transitions. [2020-11-28 03:20:00,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1016 transitions. [2020-11-28 03:20:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:20:00,542 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:00,543 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, 1] [2020-11-28 03:20:00,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 03:20:00,543 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:00,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:00,544 INFO L82 PathProgramCache]: Analyzing trace with hash 718766673, now seen corresponding path program 1 times [2020-11-28 03:20:00,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:00,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794187804] [2020-11-28 03:20:00,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:00,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:00,626 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 03:20:00,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794187804] [2020-11-28 03:20:00,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:00,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:00,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614543071] [2020-11-28 03:20:00,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:00,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:00,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:00,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:00,628 INFO L87 Difference]: Start difference. First operand 602 states and 1016 transitions. Second operand 4 states. [2020-11-28 03:20:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:00,860 INFO L93 Difference]: Finished difference Result 1099 states and 1873 transitions. [2020-11-28 03:20:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:00,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-28 03:20:00,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:00,868 INFO L225 Difference]: With dead ends: 1099 [2020-11-28 03:20:00,869 INFO L226 Difference]: Without dead ends: 1099 [2020-11-28 03:20:00,870 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 03:20:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2020-11-28 03:20:00,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 842. [2020-11-28 03:20:00,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-11-28 03:20:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1392 transitions. [2020-11-28 03:20:00,906 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1392 transitions. Word has length 28 [2020-11-28 03:20:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:00,906 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1392 transitions. [2020-11-28 03:20:00,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:00,906 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1392 transitions. [2020-11-28 03:20:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:20:00,909 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:00,909 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, 1] [2020-11-28 03:20:00,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 03:20:00,910 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:00,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:00,911 INFO L82 PathProgramCache]: Analyzing trace with hash -302301681, now seen corresponding path program 1 times [2020-11-28 03:20:00,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:00,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214536178] [2020-11-28 03:20:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:01,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:01,029 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 03:20:01,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214536178] [2020-11-28 03:20:01,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:01,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:01,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585651605] [2020-11-28 03:20:01,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:01,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:01,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:01,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:01,031 INFO L87 Difference]: Start difference. First operand 842 states and 1392 transitions. Second operand 4 states. [2020-11-28 03:20:01,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:01,286 INFO L93 Difference]: Finished difference Result 1163 states and 1913 transitions. [2020-11-28 03:20:01,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:01,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-28 03:20:01,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:01,295 INFO L225 Difference]: With dead ends: 1163 [2020-11-28 03:20:01,295 INFO L226 Difference]: Without dead ends: 1163 [2020-11-28 03:20:01,297 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 03:20:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2020-11-28 03:20:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1162. [2020-11-28 03:20:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-11-28 03:20:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1912 transitions. [2020-11-28 03:20:01,338 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1912 transitions. Word has length 28 [2020-11-28 03:20:01,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:01,339 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1912 transitions. [2020-11-28 03:20:01,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1912 transitions. [2020-11-28 03:20:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 03:20:01,342 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:01,342 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, 1, 1] [2020-11-28 03:20:01,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 03:20:01,342 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:01,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:01,343 INFO L82 PathProgramCache]: Analyzing trace with hash 813560043, now seen corresponding path program 1 times [2020-11-28 03:20:01,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:01,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033926206] [2020-11-28 03:20:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:01,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:01,472 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 03:20:01,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033926206] [2020-11-28 03:20:01,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:01,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:01,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295626334] [2020-11-28 03:20:01,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:01,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:01,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:01,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:01,474 INFO L87 Difference]: Start difference. First operand 1162 states and 1912 transitions. Second operand 4 states. [2020-11-28 03:20:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:01,692 INFO L93 Difference]: Finished difference Result 1179 states and 1913 transitions. [2020-11-28 03:20:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:01,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-28 03:20:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:01,701 INFO L225 Difference]: With dead ends: 1179 [2020-11-28 03:20:01,702 INFO L226 Difference]: Without dead ends: 1179 [2020-11-28 03:20:01,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:20:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2020-11-28 03:20:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1178. [2020-11-28 03:20:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1178 states. [2020-11-28 03:20:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1912 transitions. [2020-11-28 03:20:01,743 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1912 transitions. Word has length 29 [2020-11-28 03:20:01,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:01,743 INFO L481 AbstractCegarLoop]: Abstraction has 1178 states and 1912 transitions. [2020-11-28 03:20:01,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1912 transitions. [2020-11-28 03:20:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 03:20:01,746 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:01,746 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, 1, 1] [2020-11-28 03:20:01,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-28 03:20:01,746 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:01,749 INFO L82 PathProgramCache]: Analyzing trace with hash -774787859, now seen corresponding path program 1 times [2020-11-28 03:20:01,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:01,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215316004] [2020-11-28 03:20:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:01,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:01,830 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 03:20:01,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215316004] [2020-11-28 03:20:01,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:01,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:01,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976020619] [2020-11-28 03:20:01,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:01,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:01,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:01,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:01,832 INFO L87 Difference]: Start difference. First operand 1178 states and 1912 transitions. Second operand 4 states. [2020-11-28 03:20:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:02,054 INFO L93 Difference]: Finished difference Result 2123 states and 3481 transitions. [2020-11-28 03:20:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:02,055 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-28 03:20:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:02,068 INFO L225 Difference]: With dead ends: 2123 [2020-11-28 03:20:02,068 INFO L226 Difference]: Without dead ends: 2123 [2020-11-28 03:20:02,068 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 03:20:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2020-11-28 03:20:02,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1674. [2020-11-28 03:20:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2020-11-28 03:20:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2648 transitions. [2020-11-28 03:20:02,122 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2648 transitions. Word has length 29 [2020-11-28 03:20:02,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:02,122 INFO L481 AbstractCegarLoop]: Abstraction has 1674 states and 2648 transitions. [2020-11-28 03:20:02,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:02,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2648 transitions. [2020-11-28 03:20:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 03:20:02,125 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:02,125 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, 1, 1] [2020-11-28 03:20:02,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-28 03:20:02,126 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:02,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:02,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1795856213, now seen corresponding path program 1 times [2020-11-28 03:20:02,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:02,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397315849] [2020-11-28 03:20:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:02,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:02,204 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 03:20:02,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397315849] [2020-11-28 03:20:02,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:02,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:02,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593970688] [2020-11-28 03:20:02,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:02,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:02,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:02,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:02,210 INFO L87 Difference]: Start difference. First operand 1674 states and 2648 transitions. Second operand 4 states. [2020-11-28 03:20:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:02,425 INFO L93 Difference]: Finished difference Result 2283 states and 3593 transitions. [2020-11-28 03:20:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:02,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-28 03:20:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:02,440 INFO L225 Difference]: With dead ends: 2283 [2020-11-28 03:20:02,440 INFO L226 Difference]: Without dead ends: 2283 [2020-11-28 03:20:02,441 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 03:20:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2020-11-28 03:20:02,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2282. [2020-11-28 03:20:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2020-11-28 03:20:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3592 transitions. [2020-11-28 03:20:02,506 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3592 transitions. Word has length 29 [2020-11-28 03:20:02,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:02,506 INFO L481 AbstractCegarLoop]: Abstraction has 2282 states and 3592 transitions. [2020-11-28 03:20:02,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3592 transitions. [2020-11-28 03:20:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:20:02,509 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:02,510 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, 1, 1, 1] [2020-11-28 03:20:02,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-28 03:20:02,510 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:02,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1758020378, now seen corresponding path program 1 times [2020-11-28 03:20:02,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:02,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303048829] [2020-11-28 03:20:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:02,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:02,580 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 03:20:02,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303048829] [2020-11-28 03:20:02,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:02,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:02,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674222503] [2020-11-28 03:20:02,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:02,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:02,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:02,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:02,587 INFO L87 Difference]: Start difference. First operand 2282 states and 3592 transitions. Second operand 4 states. [2020-11-28 03:20:02,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:02,815 INFO L93 Difference]: Finished difference Result 2315 states and 3593 transitions. [2020-11-28 03:20:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:02,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-28 03:20:02,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:02,848 INFO L225 Difference]: With dead ends: 2315 [2020-11-28 03:20:02,848 INFO L226 Difference]: Without dead ends: 2315 [2020-11-28 03:20:02,848 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 03:20:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2020-11-28 03:20:02,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2314. [2020-11-28 03:20:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-11-28 03:20:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3592 transitions. [2020-11-28 03:20:02,929 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3592 transitions. Word has length 30 [2020-11-28 03:20:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:02,930 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 3592 transitions. [2020-11-28 03:20:02,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3592 transitions. [2020-11-28 03:20:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:20:02,934 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:02,934 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, 1, 1, 1] [2020-11-28 03:20:02,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-28 03:20:02,934 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:02,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:02,935 INFO L82 PathProgramCache]: Analyzing trace with hash 169672476, now seen corresponding path program 1 times [2020-11-28 03:20:02,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:02,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011532254] [2020-11-28 03:20:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:03,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:03,029 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 03:20:03,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011532254] [2020-11-28 03:20:03,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:03,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:03,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984380526] [2020-11-28 03:20:03,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:03,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:03,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:03,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:03,033 INFO L87 Difference]: Start difference. First operand 2314 states and 3592 transitions. Second operand 4 states. [2020-11-28 03:20:03,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:03,280 INFO L93 Difference]: Finished difference Result 4107 states and 6441 transitions. [2020-11-28 03:20:03,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:03,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-28 03:20:03,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:03,308 INFO L225 Difference]: With dead ends: 4107 [2020-11-28 03:20:03,308 INFO L226 Difference]: Without dead ends: 4107 [2020-11-28 03:20:03,308 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 03:20:03,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2020-11-28 03:20:03,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3338. [2020-11-28 03:20:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3338 states. [2020-11-28 03:20:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 5032 transitions. [2020-11-28 03:20:03,416 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 5032 transitions. Word has length 30 [2020-11-28 03:20:03,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:03,416 INFO L481 AbstractCegarLoop]: Abstraction has 3338 states and 5032 transitions. [2020-11-28 03:20:03,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:03,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 5032 transitions. [2020-11-28 03:20:03,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:20:03,422 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:03,422 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, 1, 1, 1] [2020-11-28 03:20:03,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-28 03:20:03,422 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:03,423 INFO L82 PathProgramCache]: Analyzing trace with hash -851395878, now seen corresponding path program 1 times [2020-11-28 03:20:03,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:03,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085328660] [2020-11-28 03:20:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:03,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:03,508 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 03:20:03,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085328660] [2020-11-28 03:20:03,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:03,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:03,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151385911] [2020-11-28 03:20:03,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:03,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:03,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:03,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:03,510 INFO L87 Difference]: Start difference. First operand 3338 states and 5032 transitions. Second operand 4 states. [2020-11-28 03:20:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:03,751 INFO L93 Difference]: Finished difference Result 4491 states and 6729 transitions. [2020-11-28 03:20:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:03,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-28 03:20:03,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:03,779 INFO L225 Difference]: With dead ends: 4491 [2020-11-28 03:20:03,779 INFO L226 Difference]: Without dead ends: 4491 [2020-11-28 03:20:03,779 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 03:20:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2020-11-28 03:20:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 4490. [2020-11-28 03:20:03,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4490 states. [2020-11-28 03:20:03,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 6728 transitions. [2020-11-28 03:20:03,904 INFO L78 Accepts]: Start accepts. Automaton has 4490 states and 6728 transitions. Word has length 30 [2020-11-28 03:20:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:03,904 INFO L481 AbstractCegarLoop]: Abstraction has 4490 states and 6728 transitions. [2020-11-28 03:20:03,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4490 states and 6728 transitions. [2020-11-28 03:20:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:20:03,910 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:03,910 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, 1, 1, 1, 1] [2020-11-28 03:20:03,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-28 03:20:03,912 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:03,913 INFO L82 PathProgramCache]: Analyzing trace with hash 971530262, now seen corresponding path program 1 times [2020-11-28 03:20:03,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:03,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083835129] [2020-11-28 03:20:03,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:03,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:03,981 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 03:20:03,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083835129] [2020-11-28 03:20:03,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:03,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:03,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074589638] [2020-11-28 03:20:03,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:03,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:03,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:03,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:03,986 INFO L87 Difference]: Start difference. First operand 4490 states and 6728 transitions. Second operand 4 states. [2020-11-28 03:20:04,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:04,206 INFO L93 Difference]: Finished difference Result 4555 states and 6729 transitions. [2020-11-28 03:20:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:04,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-28 03:20:04,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:04,246 INFO L225 Difference]: With dead ends: 4555 [2020-11-28 03:20:04,252 INFO L226 Difference]: Without dead ends: 4555 [2020-11-28 03:20:04,252 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 03:20:04,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2020-11-28 03:20:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 4554. [2020-11-28 03:20:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4554 states. [2020-11-28 03:20:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 6728 transitions. [2020-11-28 03:20:04,380 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 6728 transitions. Word has length 31 [2020-11-28 03:20:04,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:04,381 INFO L481 AbstractCegarLoop]: Abstraction has 4554 states and 6728 transitions. [2020-11-28 03:20:04,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:04,381 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 6728 transitions. [2020-11-28 03:20:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:20:04,387 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:04,387 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, 1, 1, 1, 1] [2020-11-28 03:20:04,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-28 03:20:04,387 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:04,388 INFO L82 PathProgramCache]: Analyzing trace with hash -616817640, now seen corresponding path program 1 times [2020-11-28 03:20:04,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:04,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933416981] [2020-11-28 03:20:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:04,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:04,450 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 03:20:04,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933416981] [2020-11-28 03:20:04,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:04,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:04,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915075448] [2020-11-28 03:20:04,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:04,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:04,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:04,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:04,452 INFO L87 Difference]: Start difference. First operand 4554 states and 6728 transitions. Second operand 4 states. [2020-11-28 03:20:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:04,696 INFO L93 Difference]: Finished difference Result 7947 states and 11849 transitions. [2020-11-28 03:20:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:04,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-28 03:20:04,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:04,716 INFO L225 Difference]: With dead ends: 7947 [2020-11-28 03:20:04,716 INFO L226 Difference]: Without dead ends: 7947 [2020-11-28 03:20:04,716 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 03:20:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2020-11-28 03:20:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 6666. [2020-11-28 03:20:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6666 states. [2020-11-28 03:20:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 9544 transitions. [2020-11-28 03:20:04,872 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 9544 transitions. Word has length 31 [2020-11-28 03:20:04,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:04,873 INFO L481 AbstractCegarLoop]: Abstraction has 6666 states and 9544 transitions. [2020-11-28 03:20:04,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:04,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 9544 transitions. [2020-11-28 03:20:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:20:04,884 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:04,885 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, 1, 1, 1, 1] [2020-11-28 03:20:04,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-28 03:20:04,885 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:04,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1637885994, now seen corresponding path program 1 times [2020-11-28 03:20:04,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:04,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808250554] [2020-11-28 03:20:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:04,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:04,948 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 03:20:04,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808250554] [2020-11-28 03:20:04,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:04,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:04,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174136294] [2020-11-28 03:20:04,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:04,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:04,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:04,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:04,950 INFO L87 Difference]: Start difference. First operand 6666 states and 9544 transitions. Second operand 4 states. [2020-11-28 03:20:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:05,171 INFO L93 Difference]: Finished difference Result 8843 states and 12553 transitions. [2020-11-28 03:20:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:05,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-28 03:20:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:05,191 INFO L225 Difference]: With dead ends: 8843 [2020-11-28 03:20:05,191 INFO L226 Difference]: Without dead ends: 8843 [2020-11-28 03:20:05,193 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 03:20:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2020-11-28 03:20:05,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8842. [2020-11-28 03:20:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8842 states. [2020-11-28 03:20:05,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8842 states to 8842 states and 12552 transitions. [2020-11-28 03:20:05,422 INFO L78 Accepts]: Start accepts. Automaton has 8842 states and 12552 transitions. Word has length 31 [2020-11-28 03:20:05,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:05,422 INFO L481 AbstractCegarLoop]: Abstraction has 8842 states and 12552 transitions. [2020-11-28 03:20:05,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:05,423 INFO L276 IsEmpty]: Start isEmpty. Operand 8842 states and 12552 transitions. [2020-11-28 03:20:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 03:20:05,436 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:05,436 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, 1, 1, 1, 1, 1] [2020-11-28 03:20:05,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-28 03:20:05,437 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:05,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1934816283, now seen corresponding path program 1 times [2020-11-28 03:20:05,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:05,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413468890] [2020-11-28 03:20:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:05,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:05,509 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 03:20:05,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413468890] [2020-11-28 03:20:05,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:05,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:05,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232259402] [2020-11-28 03:20:05,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:05,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:05,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:05,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:05,511 INFO L87 Difference]: Start difference. First operand 8842 states and 12552 transitions. Second operand 4 states. [2020-11-28 03:20:05,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:05,755 INFO L93 Difference]: Finished difference Result 8971 states and 12553 transitions. [2020-11-28 03:20:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:05,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-28 03:20:05,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:05,774 INFO L225 Difference]: With dead ends: 8971 [2020-11-28 03:20:05,775 INFO L226 Difference]: Without dead ends: 8971 [2020-11-28 03:20:05,775 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 03:20:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2020-11-28 03:20:05,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 8970. [2020-11-28 03:20:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8970 states. [2020-11-28 03:20:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8970 states to 8970 states and 12552 transitions. [2020-11-28 03:20:05,992 INFO L78 Accepts]: Start accepts. Automaton has 8970 states and 12552 transitions. Word has length 32 [2020-11-28 03:20:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:05,993 INFO L481 AbstractCegarLoop]: Abstraction has 8970 states and 12552 transitions. [2020-11-28 03:20:05,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:05,993 INFO L276 IsEmpty]: Start isEmpty. Operand 8970 states and 12552 transitions. [2020-11-28 03:20:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 03:20:06,017 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:06,017 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, 1, 1, 1, 1, 1] [2020-11-28 03:20:06,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-28 03:20:06,017 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash 771803111, now seen corresponding path program 1 times [2020-11-28 03:20:06,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:06,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276921175] [2020-11-28 03:20:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:06,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:06,080 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 03:20:06,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276921175] [2020-11-28 03:20:06,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:06,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:06,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546793873] [2020-11-28 03:20:06,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:06,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:06,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:06,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:06,082 INFO L87 Difference]: Start difference. First operand 8970 states and 12552 transitions. Second operand 4 states. [2020-11-28 03:20:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:06,325 INFO L93 Difference]: Finished difference Result 15371 states and 21641 transitions. [2020-11-28 03:20:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:06,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-28 03:20:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:06,355 INFO L225 Difference]: With dead ends: 15371 [2020-11-28 03:20:06,356 INFO L226 Difference]: Without dead ends: 15371 [2020-11-28 03:20:06,356 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 03:20:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2020-11-28 03:20:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 13322. [2020-11-28 03:20:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13322 states. [2020-11-28 03:20:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13322 states to 13322 states and 18056 transitions. [2020-11-28 03:20:06,669 INFO L78 Accepts]: Start accepts. Automaton has 13322 states and 18056 transitions. Word has length 32 [2020-11-28 03:20:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:06,669 INFO L481 AbstractCegarLoop]: Abstraction has 13322 states and 18056 transitions. [2020-11-28 03:20:06,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 13322 states and 18056 transitions. [2020-11-28 03:20:06,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 03:20:06,690 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:06,691 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, 1, 1, 1, 1, 1] [2020-11-28 03:20:06,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-28 03:20:06,691 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:06,692 INFO L82 PathProgramCache]: Analyzing trace with hash -249265243, now seen corresponding path program 1 times [2020-11-28 03:20:06,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:06,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031981259] [2020-11-28 03:20:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:06,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:06,754 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 03:20:06,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031981259] [2020-11-28 03:20:06,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:06,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:06,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680525486] [2020-11-28 03:20:06,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:06,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:06,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:06,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:06,757 INFO L87 Difference]: Start difference. First operand 13322 states and 18056 transitions. Second operand 4 states. [2020-11-28 03:20:07,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:07,132 INFO L93 Difference]: Finished difference Result 17419 states and 23305 transitions. [2020-11-28 03:20:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:07,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-28 03:20:07,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:07,162 INFO L225 Difference]: With dead ends: 17419 [2020-11-28 03:20:07,162 INFO L226 Difference]: Without dead ends: 17419 [2020-11-28 03:20:07,162 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 03:20:07,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17419 states. [2020-11-28 03:20:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17419 to 17418. [2020-11-28 03:20:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17418 states. [2020-11-28 03:20:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17418 states to 17418 states and 23304 transitions. [2020-11-28 03:20:07,533 INFO L78 Accepts]: Start accepts. Automaton has 17418 states and 23304 transitions. Word has length 32 [2020-11-28 03:20:07,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:07,533 INFO L481 AbstractCegarLoop]: Abstraction has 17418 states and 23304 transitions. [2020-11-28 03:20:07,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 17418 states and 23304 transitions. [2020-11-28 03:20:07,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 03:20:07,555 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:07,556 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, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:07,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-28 03:20:07,556 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:07,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1837235391, now seen corresponding path program 1 times [2020-11-28 03:20:07,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:07,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110101329] [2020-11-28 03:20:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:07,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:07,615 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 03:20:07,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110101329] [2020-11-28 03:20:07,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:07,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:07,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239418042] [2020-11-28 03:20:07,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:07,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:07,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:07,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:07,619 INFO L87 Difference]: Start difference. First operand 17418 states and 23304 transitions. Second operand 4 states. [2020-11-28 03:20:07,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:07,842 INFO L93 Difference]: Finished difference Result 17675 states and 23305 transitions. [2020-11-28 03:20:07,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:07,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-11-28 03:20:07,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:07,866 INFO L225 Difference]: With dead ends: 17675 [2020-11-28 03:20:07,866 INFO L226 Difference]: Without dead ends: 17675 [2020-11-28 03:20:07,866 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 03:20:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17675 states. [2020-11-28 03:20:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17675 to 17674. [2020-11-28 03:20:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17674 states. [2020-11-28 03:20:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17674 states to 17674 states and 23304 transitions. [2020-11-28 03:20:08,283 INFO L78 Accepts]: Start accepts. Automaton has 17674 states and 23304 transitions. Word has length 33 [2020-11-28 03:20:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:08,284 INFO L481 AbstractCegarLoop]: Abstraction has 17674 states and 23304 transitions. [2020-11-28 03:20:08,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 17674 states and 23304 transitions. [2020-11-28 03:20:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 03:20:08,302 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:08,302 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, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:08,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-28 03:20:08,302 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:08,303 INFO L82 PathProgramCache]: Analyzing trace with hash 869384003, now seen corresponding path program 1 times [2020-11-28 03:20:08,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:08,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028031549] [2020-11-28 03:20:08,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:08,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:08,354 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 03:20:08,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028031549] [2020-11-28 03:20:08,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:08,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:08,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007292610] [2020-11-28 03:20:08,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:08,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:08,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:08,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:08,356 INFO L87 Difference]: Start difference. First operand 17674 states and 23304 transitions. Second operand 4 states. [2020-11-28 03:20:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:08,684 INFO L93 Difference]: Finished difference Result 34315 states and 43529 transitions. [2020-11-28 03:20:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:08,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-11-28 03:20:08,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:08,722 INFO L225 Difference]: With dead ends: 34315 [2020-11-28 03:20:08,722 INFO L226 Difference]: Without dead ends: 34315 [2020-11-28 03:20:08,723 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 03:20:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34315 states. [2020-11-28 03:20:09,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34315 to 34314. [2020-11-28 03:20:09,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34314 states. [2020-11-28 03:20:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34314 states to 34314 states and 43528 transitions. [2020-11-28 03:20:09,288 INFO L78 Accepts]: Start accepts. Automaton has 34314 states and 43528 transitions. Word has length 33 [2020-11-28 03:20:09,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:09,288 INFO L481 AbstractCegarLoop]: Abstraction has 34314 states and 43528 transitions. [2020-11-28 03:20:09,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 34314 states and 43528 transitions. [2020-11-28 03:20:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 03:20:09,336 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:09,337 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, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:09,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-28 03:20:09,337 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:09,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1890452357, now seen corresponding path program 1 times [2020-11-28 03:20:09,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:09,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411813154] [2020-11-28 03:20:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:09,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:09,403 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 03:20:09,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411813154] [2020-11-28 03:20:09,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:09,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:09,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168005061] [2020-11-28 03:20:09,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:09,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:09,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:09,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:09,404 INFO L87 Difference]: Start difference. First operand 34314 states and 43528 transitions. Second operand 4 states. [2020-11-28 03:20:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:09,641 INFO L93 Difference]: Finished difference Result 37387 states and 48137 transitions. [2020-11-28 03:20:09,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:09,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-11-28 03:20:09,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:09,793 INFO L225 Difference]: With dead ends: 37387 [2020-11-28 03:20:09,793 INFO L226 Difference]: Without dead ends: 37387 [2020-11-28 03:20:09,793 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 03:20:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37387 states. [2020-11-28 03:20:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37387 to 34314. [2020-11-28 03:20:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34314 states. [2020-11-28 03:20:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34314 states to 34314 states and 43016 transitions. [2020-11-28 03:20:10,235 INFO L78 Accepts]: Start accepts. Automaton has 34314 states and 43016 transitions. Word has length 33 [2020-11-28 03:20:10,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:10,235 INFO L481 AbstractCegarLoop]: Abstraction has 34314 states and 43016 transitions. [2020-11-28 03:20:10,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 34314 states and 43016 transitions. [2020-11-28 03:20:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-28 03:20:10,251 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:10,251 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:10,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-28 03:20:10,251 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:10,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:10,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1187782832, now seen corresponding path program 1 times [2020-11-28 03:20:10,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:10,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494401714] [2020-11-28 03:20:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:10,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:10,309 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 03:20:10,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494401714] [2020-11-28 03:20:10,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:10,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:10,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635398080] [2020-11-28 03:20:10,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:10,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:10,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:10,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:10,311 INFO L87 Difference]: Start difference. First operand 34314 states and 43016 transitions. Second operand 4 states. [2020-11-28 03:20:10,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:10,789 INFO L93 Difference]: Finished difference Result 56843 states and 70665 transitions. [2020-11-28 03:20:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:10,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-11-28 03:20:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:10,865 INFO L225 Difference]: With dead ends: 56843 [2020-11-28 03:20:10,865 INFO L226 Difference]: Without dead ends: 56843 [2020-11-28 03:20:10,866 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 03:20:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56843 states. [2020-11-28 03:20:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56843 to 52746. [2020-11-28 03:20:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52746 states. [2020-11-28 03:20:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52746 states to 52746 states and 64520 transitions. [2020-11-28 03:20:11,661 INFO L78 Accepts]: Start accepts. Automaton has 52746 states and 64520 transitions. Word has length 34 [2020-11-28 03:20:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:11,661 INFO L481 AbstractCegarLoop]: Abstraction has 52746 states and 64520 transitions. [2020-11-28 03:20:11,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 52746 states and 64520 transitions. [2020-11-28 03:20:11,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-28 03:20:11,890 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:11,891 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:11,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-28 03:20:11,891 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:11,894 INFO L82 PathProgramCache]: Analyzing trace with hash 166714478, now seen corresponding path program 1 times [2020-11-28 03:20:11,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:11,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102182070] [2020-11-28 03:20:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:11,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:11,946 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 03:20:11,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102182070] [2020-11-28 03:20:11,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:11,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:11,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504112458] [2020-11-28 03:20:11,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:11,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:11,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:11,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:11,948 INFO L87 Difference]: Start difference. First operand 52746 states and 64520 transitions. Second operand 4 states. [2020-11-28 03:20:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:12,434 INFO L93 Difference]: Finished difference Result 67083 states and 79881 transitions. [2020-11-28 03:20:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:12,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-11-28 03:20:12,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:12,510 INFO L225 Difference]: With dead ends: 67083 [2020-11-28 03:20:12,510 INFO L226 Difference]: Without dead ends: 67083 [2020-11-28 03:20:12,511 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 03:20:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67083 states. [2020-11-28 03:20:13,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67083 to 67082. [2020-11-28 03:20:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67082 states. [2020-11-28 03:20:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67082 states to 67082 states and 79880 transitions. [2020-11-28 03:20:13,375 INFO L78 Accepts]: Start accepts. Automaton has 67082 states and 79880 transitions. Word has length 34 [2020-11-28 03:20:13,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:13,375 INFO L481 AbstractCegarLoop]: Abstraction has 67082 states and 79880 transitions. [2020-11-28 03:20:13,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:13,375 INFO L276 IsEmpty]: Start isEmpty. Operand 67082 states and 79880 transitions. [2020-11-28 03:20:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-28 03:20:13,599 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:13,599 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:13,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-28 03:20:13,601 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:13,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:13,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1826744786, now seen corresponding path program 1 times [2020-11-28 03:20:13,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:13,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917188456] [2020-11-28 03:20:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:13,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:13,724 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 03:20:13,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917188456] [2020-11-28 03:20:13,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:13,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:13,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177442732] [2020-11-28 03:20:13,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:13,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:13,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:13,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:13,727 INFO L87 Difference]: Start difference. First operand 67082 states and 79880 transitions. Second operand 4 states. [2020-11-28 03:20:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:14,055 INFO L93 Difference]: Finished difference Result 68619 states and 80905 transitions. [2020-11-28 03:20:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:14,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-11-28 03:20:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:14,121 INFO L225 Difference]: With dead ends: 68619 [2020-11-28 03:20:14,121 INFO L226 Difference]: Without dead ends: 68619 [2020-11-28 03:20:14,121 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 03:20:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2020-11-28 03:20:14,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 68618. [2020-11-28 03:20:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68618 states. [2020-11-28 03:20:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68618 states to 68618 states and 80904 transitions. [2020-11-28 03:20:14,921 INFO L78 Accepts]: Start accepts. Automaton has 68618 states and 80904 transitions. Word has length 35 [2020-11-28 03:20:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:14,922 INFO L481 AbstractCegarLoop]: Abstraction has 68618 states and 80904 transitions. [2020-11-28 03:20:14,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 68618 states and 80904 transitions. [2020-11-28 03:20:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-28 03:20:14,954 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:14,954 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:14,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-28 03:20:14,955 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:14,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:14,955 INFO L82 PathProgramCache]: Analyzing trace with hash 879874608, now seen corresponding path program 1 times [2020-11-28 03:20:14,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:14,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033173093] [2020-11-28 03:20:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:15,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:15,007 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 03:20:15,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033173093] [2020-11-28 03:20:15,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:15,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:15,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90410409] [2020-11-28 03:20:15,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:15,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:15,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:15,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:15,008 INFO L87 Difference]: Start difference. First operand 68618 states and 80904 transitions. Second operand 4 states. [2020-11-28 03:20:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:15,897 INFO L93 Difference]: Finished difference Result 110602 states and 126984 transitions. [2020-11-28 03:20:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:15,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-11-28 03:20:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:16,057 INFO L225 Difference]: With dead ends: 110602 [2020-11-28 03:20:16,057 INFO L226 Difference]: Without dead ends: 110602 [2020-11-28 03:20:16,060 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 03:20:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110602 states. [2020-11-28 03:20:17,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110602 to 106506. [2020-11-28 03:20:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106506 states. [2020-11-28 03:20:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106506 states to 106506 states and 122888 transitions. [2020-11-28 03:20:18,266 INFO L78 Accepts]: Start accepts. Automaton has 106506 states and 122888 transitions. Word has length 35 [2020-11-28 03:20:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:18,267 INFO L481 AbstractCegarLoop]: Abstraction has 106506 states and 122888 transitions. [2020-11-28 03:20:18,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 106506 states and 122888 transitions. [2020-11-28 03:20:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-28 03:20:18,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:18,384 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:18,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-28 03:20:18,384 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:20:18,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash -141193746, now seen corresponding path program 1 times [2020-11-28 03:20:18,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:18,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107610379] [2020-11-28 03:20:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:18,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:18,448 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 03:20:18,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107610379] [2020-11-28 03:20:18,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:18,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:18,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275587126] [2020-11-28 03:20:18,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:18,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:18,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:18,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:18,450 INFO L87 Difference]: Start difference. First operand 106506 states and 122888 transitions. Second operand 4 states. [2020-11-28 03:20:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:18,950 INFO L93 Difference]: Finished difference Result 133127 states and 147462 transitions. [2020-11-28 03:20:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:18,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-11-28 03:20:18,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:18,951 INFO L225 Difference]: With dead ends: 133127 [2020-11-28 03:20:18,952 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:20:18,952 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 03:20:18,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:20:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:20:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:20:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:20:18,953 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-11-28 03:20:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:18,953 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:20:18,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:20:18,954 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:20:18,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-28 03:20:18,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:20:18 BoogieIcfgContainer [2020-11-28 03:20:18,960 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:20:18,960 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:20:18,960 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:20:18,961 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:20:18,961 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:55" (3/4) ... [2020-11-28 03:20:18,964 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:20:18,971 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-11-28 03:20:18,971 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-28 03:20:18,971 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-28 03:20:18,982 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-28 03:20:18,983 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:20:18,983 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 03:20:18,984 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:20:19,055 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a5ae8179-e426-46cd-80a9-7ae887990f42/bin/uautomizer/witness.graphml [2020-11-28 03:20:19,056 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:20:19,058 INFO L168 Benchmark]: Toolchain (without parser) took 25177.77 ms. Allocated memory was 107.0 MB in the beginning and 11.1 GB in the end (delta: 11.0 GB). Free memory was 76.3 MB in the beginning and 9.8 GB in the end (delta: -9.7 GB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. [2020-11-28 03:20:19,059 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 79.7 MB. Free memory was 37.6 MB in the beginning and 37.5 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:20:19,059 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.48 ms. Allocated memory is still 107.0 MB. Free memory was 76.1 MB in the beginning and 83.3 MB in the end (delta: -7.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:19,059 INFO L168 Benchmark]: Boogie Preprocessor took 52.81 ms. Allocated memory is still 107.0 MB. Free memory was 83.3 MB in the beginning and 81.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:19,060 INFO L168 Benchmark]: RCFGBuilder took 735.92 ms. Allocated memory is still 107.0 MB. Free memory was 81.8 MB in the beginning and 58.7 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:19,061 INFO L168 Benchmark]: TraceAbstraction took 23927.60 ms. Allocated memory was 107.0 MB in the beginning and 11.1 GB in the end (delta: 11.0 GB). Free memory was 58.7 MB in the beginning and 9.8 GB in the end (delta: -9.8 GB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. [2020-11-28 03:20:19,061 INFO L168 Benchmark]: Witness Printer took 95.39 ms. Allocated memory is still 11.1 GB. Free memory was 9.8 GB in the beginning and 9.8 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:19,063 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 79.7 MB. Free memory was 37.6 MB in the beginning and 37.5 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 358.48 ms. Allocated memory is still 107.0 MB. Free memory was 76.1 MB in the beginning and 83.3 MB in the end (delta: -7.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.81 ms. Allocated memory is still 107.0 MB. Free memory was 83.3 MB in the beginning and 81.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 735.92 ms. Allocated memory is still 107.0 MB. Free memory was 81.8 MB in the beginning and 58.7 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 23927.60 ms. Allocated memory was 107.0 MB in the beginning and 11.1 GB in the end (delta: 11.0 GB). Free memory was 58.7 MB in the beginning and 9.8 GB in the end (delta: -9.8 GB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. * Witness Printer took 95.39 ms. Allocated memory is still 11.1 GB. Free memory was 9.8 GB in the beginning and 9.8 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 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, 56 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.8s, OverallIterations: 34, TraceHistogramMax: 1, AutomataDifference: 10.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3442 SDtfs, 5053 SDslu, 255 SDs, 0 SdLazy, 2412 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 235 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106506occurred in iteration=33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 8.3s AutomataMinimizationTime, 34 MinimizatonAttempts, 16387 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 987 NumberOfCodeBlocks, 987 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 953 ConstructedInterpolants, 0 QuantifiedInterpolants, 82577 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 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...