./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_8.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_8.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 37d0ed05d77a0379c9ed98058bf2f327252773ce ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 14:57:53,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 14:57:53,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 14:57:53,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 14:57:53,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 14:57:53,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 14:57:53,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 14:57:53,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 14:57:53,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 14:57:53,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 14:57:53,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 14:57:53,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 14:57:53,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 14:57:53,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 14:57:53,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 14:57:53,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 14:57:53,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 14:57:53,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 14:57:53,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 14:57:53,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 14:57:53,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 14:57:53,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 14:57:53,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 14:57:53,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 14:57:53,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 14:57:53,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 14:57:53,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 14:57:53,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 14:57:53,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 14:57:53,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 14:57:53,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 14:57:53,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 14:57:53,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 14:57:53,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 14:57:53,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 14:57:53,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 14:57:53,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 14:57:53,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 14:57:53,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 14:57:53,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 14:57:53,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 14:57:53,453 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-12-01 14:57:53,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 14:57:53,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 14:57:53,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 14:57:53,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 14:57:53,494 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 14:57:53,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 14:57:53,495 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 14:57:53,495 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-01 14:57:53,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 14:57:53,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 14:57:53,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 14:57:53,496 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-01 14:57:53,496 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-01 14:57:53,496 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-01 14:57:53,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 14:57:53,496 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-01 14:57:53,497 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 14:57:53,497 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 14:57:53,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 14:57:53,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 14:57:53,497 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 14:57:53,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 14:57:53,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 14:57:53,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 14:57:53,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 14:57:53,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 14:57:53,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 14:57:53,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 14:57:53,512 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_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37d0ed05d77a0379c9ed98058bf2f327252773ce [2020-12-01 14:57:53,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 14:57:53,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 14:57:53,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 14:57:53,839 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 14:57:53,839 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 14:57:53,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/bin/uautomizer/../../sv-benchmarks/c/locks/test_locks_8.c [2020-12-01 14:57:53,934 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/bin/uautomizer/data/33aef890d/6234038759754296addbad8d47f0a9db/FLAG220bfdb4f [2020-12-01 14:57:54,453 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 14:57:54,454 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/sv-benchmarks/c/locks/test_locks_8.c [2020-12-01 14:57:54,462 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/bin/uautomizer/data/33aef890d/6234038759754296addbad8d47f0a9db/FLAG220bfdb4f [2020-12-01 14:57:54,865 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/bin/uautomizer/data/33aef890d/6234038759754296addbad8d47f0a9db [2020-12-01 14:57:54,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 14:57:54,868 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-12-01 14:57:54,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 14:57:54,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 14:57:54,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 14:57:54,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:57:54" (1/1) ... [2020-12-01 14:57:54,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30c41cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:54, skipping insertion in model container [2020-12-01 14:57:54,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:57:54" (1/1) ... [2020-12-01 14:57:54,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 14:57:54,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 14:57:55,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 14:57:55,141 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 14:57:55,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 14:57:55,203 INFO L208 MainTranslator]: Completed translation [2020-12-01 14:57:55,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:55 WrapperNode [2020-12-01 14:57:55,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 14:57:55,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 14:57:55,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 14:57:55,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 14:57:55,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:55" (1/1) ... [2020-12-01 14:57:55,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:55" (1/1) ... [2020-12-01 14:57:55,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:55" (1/1) ... [2020-12-01 14:57:55,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:55" (1/1) ... [2020-12-01 14:57:55,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:55" (1/1) ... [2020-12-01 14:57:55,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:55" (1/1) ... [2020-12-01 14:57:55,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:55" (1/1) ... [2020-12-01 14:57:55,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 14:57:55,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 14:57:55,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 14:57:55,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 14:57:55,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/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 [2020-12-01 14:57:55,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-12-01 14:57:55,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 14:57:55,348 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-12-01 14:57:55,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-12-01 14:57:55,349 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-12-01 14:57:55,349 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-12-01 14:57:55,350 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-12-01 14:57:55,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 14:57:55,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-12-01 14:57:55,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-12-01 14:57:55,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-12-01 14:57:55,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 14:57:55,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 14:57:55,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 14:57:55,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 14:57:55,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 14:57:55,803 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 14:57:55,803 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-12-01 14:57:55,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:57:55 BoogieIcfgContainer [2020-12-01 14:57:55,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 14:57:55,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 14:57:55,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 14:57:55,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 14:57:55,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 02:57:54" (1/3) ... [2020-12-01 14:57:55,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc5e711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 02:57:55, skipping insertion in model container [2020-12-01 14:57:55,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:55" (2/3) ... [2020-12-01 14:57:55,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc5e711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 02:57:55, skipping insertion in model container [2020-12-01 14:57:55,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:57:55" (3/3) ... [2020-12-01 14:57:55,814 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-12-01 14:57:55,828 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 14:57:55,849 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-01 14:57:55,861 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-01 14:57:55,882 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 14:57:55,882 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-01 14:57:55,882 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 14:57:55,882 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 14:57:55,882 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 14:57:55,882 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 14:57:55,882 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 14:57:55,882 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 14:57:55,895 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-01 14:57:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 14:57:55,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:55,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:55,902 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:55,908 INFO L82 PathProgramCache]: Analyzing trace with hash -533984572, now seen corresponding path program 1 times [2020-12-01 14:57:55,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:55,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533233691] [2020-12-01 14:57:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:56,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:56,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533233691] [2020-12-01 14:57:56,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:56,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 14:57:56,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327416372] [2020-12-01 14:57:56,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 14:57:56,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:56,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 14:57:56,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 14:57:56,255 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-12-01 14:57:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:56,297 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2020-12-01 14:57:56,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 14:57:56,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-01 14:57:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:56,308 INFO L225 Difference]: With dead ends: 40 [2020-12-01 14:57:56,309 INFO L226 Difference]: Without dead ends: 35 [2020-12-01 14:57:56,310 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 [2020-12-01 14:57:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-01 14:57:56,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-01 14:57:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-01 14:57:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2020-12-01 14:57:56,348 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 9 [2020-12-01 14:57:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:56,348 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 58 transitions. [2020-12-01 14:57:56,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 14:57:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 58 transitions. [2020-12-01 14:57:56,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-01 14:57:56,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:56,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:56,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 14:57:56,350 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:56,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:56,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1669689353, now seen corresponding path program 1 times [2020-12-01 14:57:56,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:56,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969970284] [2020-12-01 14:57:56,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:56,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:56,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969970284] [2020-12-01 14:57:56,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:56,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:56,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847017589] [2020-12-01 14:57:56,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:56,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:56,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:56,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:56,467 INFO L87 Difference]: Start difference. First operand 35 states and 58 transitions. Second operand 4 states. [2020-12-01 14:57:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:56,703 INFO L93 Difference]: Finished difference Result 61 states and 106 transitions. [2020-12-01 14:57:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:56,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-01 14:57:56,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:56,706 INFO L225 Difference]: With dead ends: 61 [2020-12-01 14:57:56,707 INFO L226 Difference]: Without dead ends: 61 [2020-12-01 14:57:56,708 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 [2020-12-01 14:57:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-01 14:57:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2020-12-01 14:57:56,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-01 14:57:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 75 transitions. [2020-12-01 14:57:56,727 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 75 transitions. Word has length 20 [2020-12-01 14:57:56,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:56,727 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 75 transitions. [2020-12-01 14:57:56,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 75 transitions. [2020-12-01 14:57:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-01 14:57:56,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:56,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:56,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 14:57:56,729 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:56,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1411523915, now seen corresponding path program 1 times [2020-12-01 14:57:56,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:56,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542912088] [2020-12-01 14:57:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:56,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:56,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542912088] [2020-12-01 14:57:56,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:56,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:56,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890077005] [2020-12-01 14:57:56,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:56,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:56,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:56,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:56,863 INFO L87 Difference]: Start difference. First operand 44 states and 75 transitions. Second operand 4 states. [2020-12-01 14:57:57,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:57,036 INFO L93 Difference]: Finished difference Result 61 states and 104 transitions. [2020-12-01 14:57:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:57,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-01 14:57:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:57,043 INFO L225 Difference]: With dead ends: 61 [2020-12-01 14:57:57,043 INFO L226 Difference]: Without dead ends: 61 [2020-12-01 14:57:57,044 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 [2020-12-01 14:57:57,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-01 14:57:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-01 14:57:57,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-01 14:57:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 103 transitions. [2020-12-01 14:57:57,062 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 103 transitions. Word has length 20 [2020-12-01 14:57:57,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:57,063 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 103 transitions. [2020-12-01 14:57:57,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 103 transitions. [2020-12-01 14:57:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-01 14:57:57,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:57,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:57,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-01 14:57:57,065 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:57,066 INFO L82 PathProgramCache]: Analyzing trace with hash -214134839, now seen corresponding path program 1 times [2020-12-01 14:57:57,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:57,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399143999] [2020-12-01 14:57:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:57,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:57,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399143999] [2020-12-01 14:57:57,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:57,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:57,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906266371] [2020-12-01 14:57:57,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:57,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:57,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:57,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:57,187 INFO L87 Difference]: Start difference. First operand 60 states and 103 transitions. Second operand 4 states. [2020-12-01 14:57:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:57,330 INFO L93 Difference]: Finished difference Result 64 states and 106 transitions. [2020-12-01 14:57:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:57,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-01 14:57:57,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:57,334 INFO L225 Difference]: With dead ends: 64 [2020-12-01 14:57:57,334 INFO L226 Difference]: Without dead ends: 64 [2020-12-01 14:57:57,334 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 [2020-12-01 14:57:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-01 14:57:57,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-01 14:57:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-01 14:57:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 105 transitions. [2020-12-01 14:57:57,354 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 105 transitions. Word has length 21 [2020-12-01 14:57:57,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:57,355 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 105 transitions. [2020-12-01 14:57:57,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 105 transitions. [2020-12-01 14:57:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-01 14:57:57,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:57,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:57,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-01 14:57:57,357 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:57,358 INFO L82 PathProgramCache]: Analyzing trace with hash -800940853, now seen corresponding path program 1 times [2020-12-01 14:57:57,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:57,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952199475] [2020-12-01 14:57:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:57,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:57,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952199475] [2020-12-01 14:57:57,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:57,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:57,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391420451] [2020-12-01 14:57:57,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:57,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:57,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:57,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:57,478 INFO L87 Difference]: Start difference. First operand 63 states and 105 transitions. Second operand 4 states. [2020-12-01 14:57:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:57,602 INFO L93 Difference]: Finished difference Result 113 states and 191 transitions. [2020-12-01 14:57:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:57,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-01 14:57:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:57,603 INFO L225 Difference]: With dead ends: 113 [2020-12-01 14:57:57,604 INFO L226 Difference]: Without dead ends: 113 [2020-12-01 14:57:57,604 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 [2020-12-01 14:57:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-01 14:57:57,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-12-01 14:57:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-01 14:57:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 190 transitions. [2020-12-01 14:57:57,613 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 190 transitions. Word has length 21 [2020-12-01 14:57:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:57,613 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 190 transitions. [2020-12-01 14:57:57,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:57,613 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 190 transitions. [2020-12-01 14:57:57,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-01 14:57:57,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:57,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:57,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-01 14:57:57,615 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:57,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1059106291, now seen corresponding path program 1 times [2020-12-01 14:57:57,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:57,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439287501] [2020-12-01 14:57:57,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:57,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:57,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439287501] [2020-12-01 14:57:57,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:57,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:57,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590327584] [2020-12-01 14:57:57,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:57,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:57,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:57,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:57,709 INFO L87 Difference]: Start difference. First operand 112 states and 190 transitions. Second operand 4 states. [2020-12-01 14:57:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:57,838 INFO L93 Difference]: Finished difference Result 141 states and 241 transitions. [2020-12-01 14:57:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:57,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-01 14:57:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:57,841 INFO L225 Difference]: With dead ends: 141 [2020-12-01 14:57:57,841 INFO L226 Difference]: Without dead ends: 141 [2020-12-01 14:57:57,841 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 [2020-12-01 14:57:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-01 14:57:57,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 112. [2020-12-01 14:57:57,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-01 14:57:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 188 transitions. [2020-12-01 14:57:57,868 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 188 transitions. Word has length 21 [2020-12-01 14:57:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:57,869 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 188 transitions. [2020-12-01 14:57:57,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 188 transitions. [2020-12-01 14:57:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 14:57:57,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:57,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:57,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-01 14:57:57,871 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:57,872 INFO L82 PathProgramCache]: Analyzing trace with hash 947275456, now seen corresponding path program 1 times [2020-12-01 14:57:57,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:57,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868735599] [2020-12-01 14:57:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:57,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:57,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868735599] [2020-12-01 14:57:57,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:57,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:57,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369774718] [2020-12-01 14:57:57,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:57,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:57,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:57,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:57,964 INFO L87 Difference]: Start difference. First operand 112 states and 188 transitions. Second operand 4 states. [2020-12-01 14:57:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:58,095 INFO L93 Difference]: Finished difference Result 201 states and 343 transitions. [2020-12-01 14:57:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:58,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-12-01 14:57:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:58,097 INFO L225 Difference]: With dead ends: 201 [2020-12-01 14:57:58,098 INFO L226 Difference]: Without dead ends: 201 [2020-12-01 14:57:58,098 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 [2020-12-01 14:57:58,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-01 14:57:58,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2020-12-01 14:57:58,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-01 14:57:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 254 transitions. [2020-12-01 14:57:58,106 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 254 transitions. Word has length 22 [2020-12-01 14:57:58,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:58,107 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 254 transitions. [2020-12-01 14:57:58,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:58,107 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 254 transitions. [2020-12-01 14:57:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 14:57:58,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:58,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:58,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-01 14:57:58,109 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:58,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:58,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1205440894, now seen corresponding path program 1 times [2020-12-01 14:57:58,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:58,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991085967] [2020-12-01 14:57:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:58,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:58,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991085967] [2020-12-01 14:57:58,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:58,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:58,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666685860] [2020-12-01 14:57:58,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:58,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:58,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:58,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:58,183 INFO L87 Difference]: Start difference. First operand 152 states and 254 transitions. Second operand 4 states. [2020-12-01 14:57:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:58,342 INFO L93 Difference]: Finished difference Result 209 states and 345 transitions. [2020-12-01 14:57:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:58,342 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-12-01 14:57:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:58,346 INFO L225 Difference]: With dead ends: 209 [2020-12-01 14:57:58,346 INFO L226 Difference]: Without dead ends: 209 [2020-12-01 14:57:58,347 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 [2020-12-01 14:57:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-01 14:57:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2020-12-01 14:57:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-01 14:57:58,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 344 transitions. [2020-12-01 14:57:58,360 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 344 transitions. Word has length 22 [2020-12-01 14:57:58,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:58,361 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 344 transitions. [2020-12-01 14:57:58,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 344 transitions. [2020-12-01 14:57:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 14:57:58,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:58,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:58,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-01 14:57:58,370 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:58,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:58,370 INFO L82 PathProgramCache]: Analyzing trace with hash -692583242, now seen corresponding path program 1 times [2020-12-01 14:57:58,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:58,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810493110] [2020-12-01 14:57:58,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:58,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:58,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810493110] [2020-12-01 14:57:58,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:58,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:58,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388342058] [2020-12-01 14:57:58,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:58,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:58,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:58,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:58,463 INFO L87 Difference]: Start difference. First operand 208 states and 344 transitions. Second operand 4 states. [2020-12-01 14:57:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:58,588 INFO L93 Difference]: Finished difference Result 215 states and 349 transitions. [2020-12-01 14:57:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:58,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-12-01 14:57:58,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:58,590 INFO L225 Difference]: With dead ends: 215 [2020-12-01 14:57:58,590 INFO L226 Difference]: Without dead ends: 215 [2020-12-01 14:57:58,591 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 [2020-12-01 14:57:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-01 14:57:58,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2020-12-01 14:57:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-01 14:57:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 348 transitions. [2020-12-01 14:57:58,599 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 348 transitions. Word has length 23 [2020-12-01 14:57:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:58,599 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 348 transitions. [2020-12-01 14:57:58,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 348 transitions. [2020-12-01 14:57:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 14:57:58,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:58,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:58,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-01 14:57:58,602 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:58,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1279389256, now seen corresponding path program 1 times [2020-12-01 14:57:58,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:58,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982278637] [2020-12-01 14:57:58,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:58,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:58,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982278637] [2020-12-01 14:57:58,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:58,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:58,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616032534] [2020-12-01 14:57:58,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:58,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:58,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:58,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:58,678 INFO L87 Difference]: Start difference. First operand 214 states and 348 transitions. Second operand 4 states. [2020-12-01 14:57:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:58,812 INFO L93 Difference]: Finished difference Result 379 states and 621 transitions. [2020-12-01 14:57:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:58,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-12-01 14:57:58,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:58,816 INFO L225 Difference]: With dead ends: 379 [2020-12-01 14:57:58,816 INFO L226 Difference]: Without dead ends: 379 [2020-12-01 14:57:58,816 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 [2020-12-01 14:57:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-12-01 14:57:58,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 298. [2020-12-01 14:57:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-12-01 14:57:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 476 transitions. [2020-12-01 14:57:58,827 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 476 transitions. Word has length 23 [2020-12-01 14:57:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:58,827 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 476 transitions. [2020-12-01 14:57:58,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 476 transitions. [2020-12-01 14:57:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 14:57:58,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:58,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:58,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-01 14:57:58,831 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:58,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:58,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1021223818, now seen corresponding path program 1 times [2020-12-01 14:57:58,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:58,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740454588] [2020-12-01 14:57:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:58,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:58,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740454588] [2020-12-01 14:57:58,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:58,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:58,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577252513] [2020-12-01 14:57:58,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:58,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:58,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:58,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:58,887 INFO L87 Difference]: Start difference. First operand 298 states and 476 transitions. Second operand 4 states. [2020-12-01 14:57:59,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:59,009 INFO L93 Difference]: Finished difference Result 403 states and 633 transitions. [2020-12-01 14:57:59,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:59,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-12-01 14:57:59,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:59,012 INFO L225 Difference]: With dead ends: 403 [2020-12-01 14:57:59,012 INFO L226 Difference]: Without dead ends: 403 [2020-12-01 14:57:59,013 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 [2020-12-01 14:57:59,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-12-01 14:57:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 402. [2020-12-01 14:57:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-12-01 14:57:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 632 transitions. [2020-12-01 14:57:59,024 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 632 transitions. Word has length 23 [2020-12-01 14:57:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:59,025 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 632 transitions. [2020-12-01 14:57:59,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:59,025 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 632 transitions. [2020-12-01 14:57:59,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-01 14:57:59,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:59,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:59,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-01 14:57:59,026 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:59,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:59,026 INFO L82 PathProgramCache]: Analyzing trace with hash -999702007, now seen corresponding path program 1 times [2020-12-01 14:57:59,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:59,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523197149] [2020-12-01 14:57:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:59,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:59,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523197149] [2020-12-01 14:57:59,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:59,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:59,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292566218] [2020-12-01 14:57:59,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:59,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:59,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:59,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:59,087 INFO L87 Difference]: Start difference. First operand 402 states and 632 transitions. Second operand 4 states. [2020-12-01 14:57:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:59,219 INFO L93 Difference]: Finished difference Result 411 states and 633 transitions. [2020-12-01 14:57:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:59,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-12-01 14:57:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:59,222 INFO L225 Difference]: With dead ends: 411 [2020-12-01 14:57:59,222 INFO L226 Difference]: Without dead ends: 411 [2020-12-01 14:57:59,222 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 [2020-12-01 14:57:59,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-12-01 14:57:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 410. [2020-12-01 14:57:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-12-01 14:57:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 632 transitions. [2020-12-01 14:57:59,236 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 632 transitions. Word has length 24 [2020-12-01 14:57:59,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:59,236 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 632 transitions. [2020-12-01 14:57:59,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 632 transitions. [2020-12-01 14:57:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-01 14:57:59,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:59,239 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] [2020-12-01 14:57:59,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-01 14:57:59,239 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:59,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1586508021, now seen corresponding path program 1 times [2020-12-01 14:57:59,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:59,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525479114] [2020-12-01 14:57:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:59,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:59,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525479114] [2020-12-01 14:57:59,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:59,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:59,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300257101] [2020-12-01 14:57:59,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:59,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:59,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:59,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:59,318 INFO L87 Difference]: Start difference. First operand 410 states and 632 transitions. Second operand 4 states. [2020-12-01 14:57:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:59,444 INFO L93 Difference]: Finished difference Result 715 states and 1105 transitions. [2020-12-01 14:57:59,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:59,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-12-01 14:57:59,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:59,449 INFO L225 Difference]: With dead ends: 715 [2020-12-01 14:57:59,450 INFO L226 Difference]: Without dead ends: 715 [2020-12-01 14:57:59,450 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 [2020-12-01 14:57:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-12-01 14:57:59,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 586. [2020-12-01 14:57:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-12-01 14:57:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 880 transitions. [2020-12-01 14:57:59,467 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 880 transitions. Word has length 24 [2020-12-01 14:57:59,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:59,468 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 880 transitions. [2020-12-01 14:57:59,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 880 transitions. [2020-12-01 14:57:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-01 14:57:59,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:59,470 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] [2020-12-01 14:57:59,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-01 14:57:59,470 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:59,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1328342583, now seen corresponding path program 1 times [2020-12-01 14:57:59,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:59,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722268885] [2020-12-01 14:57:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:59,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:59,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722268885] [2020-12-01 14:57:59,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:59,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:59,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705880435] [2020-12-01 14:57:59,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:59,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:59,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:59,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:59,522 INFO L87 Difference]: Start difference. First operand 586 states and 880 transitions. Second operand 4 states. [2020-12-01 14:57:59,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:59,651 INFO L93 Difference]: Finished difference Result 779 states and 1145 transitions. [2020-12-01 14:57:59,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:59,651 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-12-01 14:57:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:59,657 INFO L225 Difference]: With dead ends: 779 [2020-12-01 14:57:59,657 INFO L226 Difference]: Without dead ends: 779 [2020-12-01 14:57:59,658 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 [2020-12-01 14:57:59,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-12-01 14:57:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 778. [2020-12-01 14:57:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-12-01 14:57:59,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1144 transitions. [2020-12-01 14:57:59,678 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1144 transitions. Word has length 24 [2020-12-01 14:57:59,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:59,678 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1144 transitions. [2020-12-01 14:57:59,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:59,679 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1144 transitions. [2020-12-01 14:57:59,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-01 14:57:59,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:59,680 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] [2020-12-01 14:57:59,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-01 14:57:59,680 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:59,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1930438559, now seen corresponding path program 1 times [2020-12-01 14:57:59,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:59,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817344262] [2020-12-01 14:57:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:59,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:59,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817344262] [2020-12-01 14:57:59,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:59,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:59,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324578624] [2020-12-01 14:57:59,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:59,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:59,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:59,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:59,733 INFO L87 Difference]: Start difference. First operand 778 states and 1144 transitions. Second operand 4 states. [2020-12-01 14:57:59,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:59,870 INFO L93 Difference]: Finished difference Result 795 states and 1145 transitions. [2020-12-01 14:57:59,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:59,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-01 14:57:59,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:59,874 INFO L225 Difference]: With dead ends: 795 [2020-12-01 14:57:59,875 INFO L226 Difference]: Without dead ends: 795 [2020-12-01 14:57:59,876 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 [2020-12-01 14:57:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-12-01 14:57:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 794. [2020-12-01 14:57:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-12-01 14:57:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1144 transitions. [2020-12-01 14:57:59,897 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1144 transitions. Word has length 25 [2020-12-01 14:57:59,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:59,897 INFO L481 AbstractCegarLoop]: Abstraction has 794 states and 1144 transitions. [2020-12-01 14:57:59,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1144 transitions. [2020-12-01 14:57:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-01 14:57:59,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:59,899 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] [2020-12-01 14:57:59,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-01 14:57:59,899 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:57:59,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:59,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1777722723, now seen corresponding path program 1 times [2020-12-01 14:57:59,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:59,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159036713] [2020-12-01 14:57:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:59,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:59,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159036713] [2020-12-01 14:57:59,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:59,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:59,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197539300] [2020-12-01 14:57:59,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:59,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:59,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:59,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:59,956 INFO L87 Difference]: Start difference. First operand 794 states and 1144 transitions. Second operand 4 states. [2020-12-01 14:58:00,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:58:00,082 INFO L93 Difference]: Finished difference Result 1355 states and 1945 transitions. [2020-12-01 14:58:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:58:00,082 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-01 14:58:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:58:00,090 INFO L225 Difference]: With dead ends: 1355 [2020-12-01 14:58:00,090 INFO L226 Difference]: Without dead ends: 1355 [2020-12-01 14:58:00,090 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 [2020-12-01 14:58:00,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-12-01 14:58:00,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1162. [2020-12-01 14:58:00,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-12-01 14:58:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1624 transitions. [2020-12-01 14:58:00,121 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1624 transitions. Word has length 25 [2020-12-01 14:58:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:58:00,121 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1624 transitions. [2020-12-01 14:58:00,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:58:00,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1624 transitions. [2020-12-01 14:58:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-01 14:58:00,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:58:00,124 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] [2020-12-01 14:58:00,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-01 14:58:00,124 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:58:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:58:00,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2035888161, now seen corresponding path program 1 times [2020-12-01 14:58:00,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:58:00,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264793042] [2020-12-01 14:58:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:58:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:00,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:58:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:58:00,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264793042] [2020-12-01 14:58:00,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:58:00,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:58:00,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445517044] [2020-12-01 14:58:00,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:58:00,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:58:00,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:58:00,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:58:00,183 INFO L87 Difference]: Start difference. First operand 1162 states and 1624 transitions. Second operand 4 states. [2020-12-01 14:58:00,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:58:00,331 INFO L93 Difference]: Finished difference Result 1515 states and 2057 transitions. [2020-12-01 14:58:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:58:00,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-01 14:58:00,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:58:00,339 INFO L225 Difference]: With dead ends: 1515 [2020-12-01 14:58:00,339 INFO L226 Difference]: Without dead ends: 1515 [2020-12-01 14:58:00,340 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 [2020-12-01 14:58:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2020-12-01 14:58:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1514. [2020-12-01 14:58:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2020-12-01 14:58:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2056 transitions. [2020-12-01 14:58:00,388 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2056 transitions. Word has length 25 [2020-12-01 14:58:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:58:00,389 INFO L481 AbstractCegarLoop]: Abstraction has 1514 states and 2056 transitions. [2020-12-01 14:58:00,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:58:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2056 transitions. [2020-12-01 14:58:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-01 14:58:00,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:58:00,392 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] [2020-12-01 14:58:00,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-01 14:58:00,392 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:58:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:58:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash -718490028, now seen corresponding path program 1 times [2020-12-01 14:58:00,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:58:00,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202093886] [2020-12-01 14:58:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:58:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:00,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:58:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:58:00,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202093886] [2020-12-01 14:58:00,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:58:00,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:58:00,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111528407] [2020-12-01 14:58:00,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:58:00,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:58:00,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:58:00,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:58:00,454 INFO L87 Difference]: Start difference. First operand 1514 states and 2056 transitions. Second operand 4 states. [2020-12-01 14:58:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:58:00,580 INFO L93 Difference]: Finished difference Result 1547 states and 2057 transitions. [2020-12-01 14:58:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:58:00,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-01 14:58:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:58:00,588 INFO L225 Difference]: With dead ends: 1547 [2020-12-01 14:58:00,589 INFO L226 Difference]: Without dead ends: 1547 [2020-12-01 14:58:00,589 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 [2020-12-01 14:58:00,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-12-01 14:58:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1546. [2020-12-01 14:58:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-12-01 14:58:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2056 transitions. [2020-12-01 14:58:00,629 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2056 transitions. Word has length 26 [2020-12-01 14:58:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:58:00,630 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 2056 transitions. [2020-12-01 14:58:00,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:58:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2056 transitions. [2020-12-01 14:58:00,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-01 14:58:00,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:58:00,632 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] [2020-12-01 14:58:00,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-01 14:58:00,632 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:58:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:58:00,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1305296042, now seen corresponding path program 1 times [2020-12-01 14:58:00,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:58:00,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729428584] [2020-12-01 14:58:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:58:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:00,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:58:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:58:00,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729428584] [2020-12-01 14:58:00,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:58:00,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:58:00,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031511989] [2020-12-01 14:58:00,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:58:00,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:58:00,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:58:00,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:58:00,692 INFO L87 Difference]: Start difference. First operand 1546 states and 2056 transitions. Second operand 4 states. [2020-12-01 14:58:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:58:00,821 INFO L93 Difference]: Finished difference Result 2571 states and 3369 transitions. [2020-12-01 14:58:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:58:00,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-01 14:58:00,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:58:00,834 INFO L225 Difference]: With dead ends: 2571 [2020-12-01 14:58:00,834 INFO L226 Difference]: Without dead ends: 2571 [2020-12-01 14:58:00,834 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 [2020-12-01 14:58:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2020-12-01 14:58:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2314. [2020-12-01 14:58:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-12-01 14:58:00,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 2984 transitions. [2020-12-01 14:58:00,907 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 2984 transitions. Word has length 26 [2020-12-01 14:58:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:58:00,908 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 2984 transitions. [2020-12-01 14:58:00,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:58:00,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 2984 transitions. [2020-12-01 14:58:00,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-01 14:58:00,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:58:00,911 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] [2020-12-01 14:58:00,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-01 14:58:00,912 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:58:00,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:58:00,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1047130604, now seen corresponding path program 1 times [2020-12-01 14:58:00,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:58:00,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961175187] [2020-12-01 14:58:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:58:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:00,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:58:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:58:00,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961175187] [2020-12-01 14:58:00,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:58:00,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:58:00,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74723908] [2020-12-01 14:58:00,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:58:00,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:58:00,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:58:00,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:58:00,986 INFO L87 Difference]: Start difference. First operand 2314 states and 2984 transitions. Second operand 4 states. [2020-12-01 14:58:01,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:58:01,124 INFO L93 Difference]: Finished difference Result 2955 states and 3657 transitions. [2020-12-01 14:58:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:58:01,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-01 14:58:01,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:58:01,138 INFO L225 Difference]: With dead ends: 2955 [2020-12-01 14:58:01,138 INFO L226 Difference]: Without dead ends: 2955 [2020-12-01 14:58:01,138 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 [2020-12-01 14:58:01,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2020-12-01 14:58:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2954. [2020-12-01 14:58:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2954 states. [2020-12-01 14:58:01,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 3656 transitions. [2020-12-01 14:58:01,213 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 3656 transitions. Word has length 26 [2020-12-01 14:58:01,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:58:01,213 INFO L481 AbstractCegarLoop]: Abstraction has 2954 states and 3656 transitions. [2020-12-01 14:58:01,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:58:01,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 3656 transitions. [2020-12-01 14:58:01,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-01 14:58:01,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:58:01,217 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] [2020-12-01 14:58:01,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-01 14:58:01,218 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:58:01,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:58:01,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1802780660, now seen corresponding path program 1 times [2020-12-01 14:58:01,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:58:01,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497744210] [2020-12-01 14:58:01,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:58:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:01,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:58:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:58:01,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497744210] [2020-12-01 14:58:01,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:58:01,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:58:01,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444025378] [2020-12-01 14:58:01,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:58:01,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:58:01,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:58:01,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:58:01,272 INFO L87 Difference]: Start difference. First operand 2954 states and 3656 transitions. Second operand 4 states. [2020-12-01 14:58:01,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:58:01,426 INFO L93 Difference]: Finished difference Result 3019 states and 3657 transitions. [2020-12-01 14:58:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:58:01,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-12-01 14:58:01,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:58:01,443 INFO L225 Difference]: With dead ends: 3019 [2020-12-01 14:58:01,443 INFO L226 Difference]: Without dead ends: 3019 [2020-12-01 14:58:01,443 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 [2020-12-01 14:58:01,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2020-12-01 14:58:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3018. [2020-12-01 14:58:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3018 states. [2020-12-01 14:58:01,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 3656 transitions. [2020-12-01 14:58:01,521 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 3656 transitions. Word has length 27 [2020-12-01 14:58:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:58:01,521 INFO L481 AbstractCegarLoop]: Abstraction has 3018 states and 3656 transitions. [2020-12-01 14:58:01,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:58:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 3656 transitions. [2020-12-01 14:58:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-01 14:58:01,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:58:01,525 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] [2020-12-01 14:58:01,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-01 14:58:01,525 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:58:01,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:58:01,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1905380622, now seen corresponding path program 1 times [2020-12-01 14:58:01,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:58:01,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518408205] [2020-12-01 14:58:01,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:58:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:01,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:58:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:58:01,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518408205] [2020-12-01 14:58:01,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:58:01,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:58:01,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500837244] [2020-12-01 14:58:01,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:58:01,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:58:01,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:58:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:58:01,577 INFO L87 Difference]: Start difference. First operand 3018 states and 3656 transitions. Second operand 4 states. [2020-12-01 14:58:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:58:01,700 INFO L93 Difference]: Finished difference Result 4874 states and 5704 transitions. [2020-12-01 14:58:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:58:01,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-12-01 14:58:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:58:01,724 INFO L225 Difference]: With dead ends: 4874 [2020-12-01 14:58:01,724 INFO L226 Difference]: Without dead ends: 4874 [2020-12-01 14:58:01,725 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 [2020-12-01 14:58:01,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2020-12-01 14:58:01,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 4618. [2020-12-01 14:58:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4618 states. [2020-12-01 14:58:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 5448 transitions. [2020-12-01 14:58:01,835 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 5448 transitions. Word has length 27 [2020-12-01 14:58:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:58:01,835 INFO L481 AbstractCegarLoop]: Abstraction has 4618 states and 5448 transitions. [2020-12-01 14:58:01,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:58:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 5448 transitions. [2020-12-01 14:58:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-01 14:58:01,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:58:01,865 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] [2020-12-01 14:58:01,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-01 14:58:01,865 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-12-01 14:58:01,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:58:01,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2131421236, now seen corresponding path program 1 times [2020-12-01 14:58:01,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:58:01,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470053684] [2020-12-01 14:58:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:58:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:01,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:58:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:58:01,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470053684] [2020-12-01 14:58:01,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:58:01,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:58:01,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62527663] [2020-12-01 14:58:01,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:58:01,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:58:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:58:01,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:58:01,916 INFO L87 Difference]: Start difference. First operand 4618 states and 5448 transitions. Second operand 4 states. [2020-12-01 14:58:02,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:58:02,030 INFO L93 Difference]: Finished difference Result 5767 states and 6406 transitions. [2020-12-01 14:58:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:58:02,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-12-01 14:58:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:58:02,031 INFO L225 Difference]: With dead ends: 5767 [2020-12-01 14:58:02,031 INFO L226 Difference]: Without dead ends: 0 [2020-12-01 14:58:02,032 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 [2020-12-01 14:58:02,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-01 14:58:02,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-01 14:58:02,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-01 14:58:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-01 14:58:02,032 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-12-01 14:58:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:58:02,033 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 14:58:02,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:58:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-01 14:58:02,033 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-01 14:58:02,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-01 14:58:02,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 02:58:02 BoogieIcfgContainer [2020-12-01 14:58:02,043 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 14:58:02,043 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 14:58:02,043 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 14:58:02,044 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 14:58:02,050 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:57:55" (3/4) ... [2020-12-01 14:58:02,053 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-01 14:58:02,060 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-12-01 14:58:02,060 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-12-01 14:58:02,061 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-12-01 14:58:02,072 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-01 14:58:02,072 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-01 14:58:02,072 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-01 14:58:02,073 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-01 14:58:02,129 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8b7a42e3-0b4a-4191-b3a9-5e09e2340017/bin/uautomizer/witness.graphml [2020-12-01 14:58:02,129 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 14:58:02,131 INFO L168 Benchmark]: Toolchain (without parser) took 7261.90 ms. Allocated memory was 102.8 MB in the beginning and 197.1 MB in the end (delta: 94.4 MB). Free memory was 76.3 MB in the beginning and 124.0 MB in the end (delta: -47.7 MB). Peak memory consumption was 46.0 MB. Max. memory is 16.1 GB. [2020-12-01 14:58:02,132 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 73.4 MB. Free memory was 45.9 MB in the beginning and 45.8 MB in the end (delta: 40.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 14:58:02,133 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.57 ms. Allocated memory is still 102.8 MB. Free memory was 76.1 MB in the beginning and 73.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-01 14:58:02,133 INFO L168 Benchmark]: Boogie Preprocessor took 59.01 ms. Allocated memory is still 102.8 MB. Free memory was 73.2 MB in the beginning and 71.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 14:58:02,134 INFO L168 Benchmark]: RCFGBuilder took 538.24 ms. Allocated memory is still 102.8 MB. Free memory was 71.5 MB in the beginning and 53.0 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-01 14:58:02,134 INFO L168 Benchmark]: TraceAbstraction took 6236.32 ms. Allocated memory was 102.8 MB in the beginning and 197.1 MB in the end (delta: 94.4 MB). Free memory was 52.5 MB in the beginning and 128.2 MB in the end (delta: -75.7 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. [2020-12-01 14:58:02,134 INFO L168 Benchmark]: Witness Printer took 85.59 ms. Allocated memory is still 197.1 MB. Free memory was 128.2 MB in the beginning and 124.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-01 14:58:02,136 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 73.4 MB. Free memory was 45.9 MB in the beginning and 45.8 MB in the end (delta: 40.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 337.57 ms. Allocated memory is still 102.8 MB. Free memory was 76.1 MB in the beginning and 73.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.01 ms. Allocated memory is still 102.8 MB. Free memory was 73.2 MB in the beginning and 71.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 538.24 ms. Allocated memory is still 102.8 MB. Free memory was 71.5 MB in the beginning and 53.0 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6236.32 ms. Allocated memory was 102.8 MB in the beginning and 197.1 MB in the end (delta: 94.4 MB). Free memory was 52.5 MB in the beginning and 128.2 MB in the end (delta: -75.7 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. * Witness Printer took 85.59 ms. Allocated memory is still 197.1 MB. Free memory was 128.2 MB in the beginning and 124.0 MB 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, 44 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1616 SDtfs, 2261 SDslu, 170 SDs, 0 SdLazy, 1123 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4618occurred in iteration=22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 23 MinimizatonAttempts, 1024 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 531 NumberOfCodeBlocks, 531 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 508 ConstructedInterpolants, 0 QuantifiedInterpolants, 36258 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...