./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/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 d28fd50bd3f7e49bee026aec860ad9015a4fdfba ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:04:01,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:04:01,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:04:01,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:04:01,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:04:01,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:04:01,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:04:01,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:04:01,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:04:01,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:04:01,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:04:01,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:04:01,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:04:01,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:04:01,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:04:01,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:04:01,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:04:01,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:04:01,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:04:01,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:04:01,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:04:01,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:04:01,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:04:01,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:04:01,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:04:01,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:04:01,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:04:01,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:04:01,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:04:01,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:04:01,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:04:01,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:04:01,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:04:01,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:04:01,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:04:01,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:04:01,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:04:01,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:04:01,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:04:01,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:04:01,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:04:01,344 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:04:01,391 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:04:01,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:04:01,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:04:01,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:04:01,395 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:04:01,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:04:01,395 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:04:01,396 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:04:01,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:04:01,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:04:01,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:04:01,398 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:04:01,398 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:04:01,398 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:04:01,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:04:01,399 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:04:01,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:04:01,400 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:04:01,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:04:01,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:04:01,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:04:01,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:04:01,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:04:01,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:04:01,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:04:01,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:04:01,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:04:01,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:04:01,403 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_18393a01-48aa-40c4-b04b-a9695f43df0e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d28fd50bd3f7e49bee026aec860ad9015a4fdfba [2020-11-28 03:04:01,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:04:01,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:04:01,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:04:01,796 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:04:01,797 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:04:01,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/bin/uautomizer/../../sv-benchmarks/c/locks/test_locks_5.c [2020-11-28 03:04:01,887 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/bin/uautomizer/data/0b2ccc3fa/39d03a8b87354dab8989cdf498dc4a94/FLAGfe2e198b7 [2020-11-28 03:04:02,547 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:04:02,552 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/sv-benchmarks/c/locks/test_locks_5.c [2020-11-28 03:04:02,561 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/bin/uautomizer/data/0b2ccc3fa/39d03a8b87354dab8989cdf498dc4a94/FLAGfe2e198b7 [2020-11-28 03:04:02,890 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/bin/uautomizer/data/0b2ccc3fa/39d03a8b87354dab8989cdf498dc4a94 [2020-11-28 03:04:02,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:04:02,894 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:04:02,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:04:02,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:04:02,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:04:02,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:04:02" (1/1) ... [2020-11-28 03:04:02,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fc5694d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:02, skipping insertion in model container [2020-11-28 03:04:02,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:04:02" (1/1) ... [2020-11-28 03:04:02,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:04:02,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:04:03,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:04:03,179 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:04:03,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:04:03,224 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:04:03,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:03 WrapperNode [2020-11-28 03:04:03,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:04:03,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:04:03,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:04:03,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:04:03,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:03" (1/1) ... [2020-11-28 03:04:03,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:03" (1/1) ... [2020-11-28 03:04:03,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:03" (1/1) ... [2020-11-28 03:04:03,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:03" (1/1) ... [2020-11-28 03:04:03,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:03" (1/1) ... [2020-11-28 03:04:03,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:03" (1/1) ... [2020-11-28 03:04:03,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:03" (1/1) ... [2020-11-28 03:04:03,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:04:03,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:04:03,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:04:03,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:04:03,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:04:03,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:04:03,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:04:03,356 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-28 03:04:03,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:04:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-28 03:04:03,357 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-28 03:04:03,357 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-28 03:04:03,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:04:03,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-28 03:04:03,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:04:03,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:04:03,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:04:03,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:04:03,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:04:03,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:04:03,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:04:03,789 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:04:03,789 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-28 03:04:03,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:04:03 BoogieIcfgContainer [2020-11-28 03:04:03,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:04:03,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:04:03,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:04:03,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:04:03,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:04:02" (1/3) ... [2020-11-28 03:04:03,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c479b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:04:03, skipping insertion in model container [2020-11-28 03:04:03,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:03" (2/3) ... [2020-11-28 03:04:03,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c479b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:04:03, skipping insertion in model container [2020-11-28 03:04:03,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:04:03" (3/3) ... [2020-11-28 03:04:03,814 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-11-28 03:04:03,829 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:04:03,834 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:04:03,849 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:04:03,886 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:04:03,886 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:04:03,886 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:04:03,886 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:04:03,886 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:04:03,886 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:04:03,887 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:04:03,887 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:04:03,906 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-11-28 03:04:03,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:04:03,916 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:03,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:03,917 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:03,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:03,924 INFO L82 PathProgramCache]: Analyzing trace with hash -55357090, now seen corresponding path program 1 times [2020-11-28 03:04:03,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:03,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405389734] [2020-11-28 03:04:03,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:04,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:04,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405389734] [2020-11-28 03:04:04,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:04,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:04:04,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667218362] [2020-11-28 03:04:04,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:04:04,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:04,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:04:04,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:04:04,318 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-11-28 03:04:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:04,380 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2020-11-28 03:04:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:04:04,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-28 03:04:04,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:04,404 INFO L225 Difference]: With dead ends: 31 [2020-11-28 03:04:04,413 INFO L226 Difference]: Without dead ends: 26 [2020-11-28 03:04:04,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:04:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-28 03:04:04,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-28 03:04:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-28 03:04:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 40 transitions. [2020-11-28 03:04:04,464 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 40 transitions. Word has length 9 [2020-11-28 03:04:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:04,465 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 40 transitions. [2020-11-28 03:04:04,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:04:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 40 transitions. [2020-11-28 03:04:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 03:04:04,467 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:04,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:04,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:04:04,469 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2007343126, now seen corresponding path program 1 times [2020-11-28 03:04:04,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:04,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703936546] [2020-11-28 03:04:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:04,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:04,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703936546] [2020-11-28 03:04:04,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:04,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:04,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560129751] [2020-11-28 03:04:04,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:04,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:04,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:04,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:04,696 INFO L87 Difference]: Start difference. First operand 26 states and 40 transitions. Second operand 4 states. [2020-11-28 03:04:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:04,947 INFO L93 Difference]: Finished difference Result 43 states and 70 transitions. [2020-11-28 03:04:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:04,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-28 03:04:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:04,950 INFO L225 Difference]: With dead ends: 43 [2020-11-28 03:04:04,951 INFO L226 Difference]: Without dead ends: 43 [2020-11-28 03:04:04,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-28 03:04:04,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2020-11-28 03:04:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-28 03:04:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 51 transitions. [2020-11-28 03:04:04,970 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 51 transitions. Word has length 17 [2020-11-28 03:04:04,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:04,971 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 51 transitions. [2020-11-28 03:04:04,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:04,971 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 51 transitions. [2020-11-28 03:04:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 03:04:04,973 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:04,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:04,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:04:04,974 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:04,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:04,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1607565800, now seen corresponding path program 1 times [2020-11-28 03:04:04,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:04,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011443281] [2020-11-28 03:04:04,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:05,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:05,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011443281] [2020-11-28 03:04:05,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:05,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:05,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19668344] [2020-11-28 03:04:05,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:05,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:05,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:05,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:05,141 INFO L87 Difference]: Start difference. First operand 32 states and 51 transitions. Second operand 4 states. [2020-11-28 03:04:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:05,341 INFO L93 Difference]: Finished difference Result 43 states and 68 transitions. [2020-11-28 03:04:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:05,342 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-28 03:04:05,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:05,343 INFO L225 Difference]: With dead ends: 43 [2020-11-28 03:04:05,344 INFO L226 Difference]: Without dead ends: 43 [2020-11-28 03:04:05,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:05,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-28 03:04:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-11-28 03:04:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 03:04:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 67 transitions. [2020-11-28 03:04:05,352 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 67 transitions. Word has length 17 [2020-11-28 03:04:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:05,352 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 67 transitions. [2020-11-28 03:04:05,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 67 transitions. [2020-11-28 03:04:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:04:05,354 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:05,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:05,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:04:05,355 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:05,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2104752446, now seen corresponding path program 1 times [2020-11-28 03:04:05,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:05,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839028006] [2020-11-28 03:04:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:05,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:05,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839028006] [2020-11-28 03:04:05,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:05,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:05,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587449895] [2020-11-28 03:04:05,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:05,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:05,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:05,466 INFO L87 Difference]: Start difference. First operand 42 states and 67 transitions. Second operand 4 states. [2020-11-28 03:04:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:05,645 INFO L93 Difference]: Finished difference Result 46 states and 70 transitions. [2020-11-28 03:04:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:05,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-28 03:04:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:05,647 INFO L225 Difference]: With dead ends: 46 [2020-11-28 03:04:05,647 INFO L226 Difference]: Without dead ends: 46 [2020-11-28 03:04:05,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-28 03:04:05,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-11-28 03:04:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 03:04:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2020-11-28 03:04:05,654 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 18 [2020-11-28 03:04:05,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:05,657 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2020-11-28 03:04:05,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2020-11-28 03:04:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:04:05,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:05,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:05,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:04:05,660 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1711725436, now seen corresponding path program 1 times [2020-11-28 03:04:05,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:05,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956524534] [2020-11-28 03:04:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:05,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:05,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956524534] [2020-11-28 03:04:05,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:05,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:05,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042965876] [2020-11-28 03:04:05,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:05,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:05,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:05,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:05,780 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand 4 states. [2020-11-28 03:04:05,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:05,946 INFO L93 Difference]: Finished difference Result 77 states and 119 transitions. [2020-11-28 03:04:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:05,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-28 03:04:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:05,950 INFO L225 Difference]: With dead ends: 77 [2020-11-28 03:04:05,950 INFO L226 Difference]: Without dead ends: 77 [2020-11-28 03:04:05,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:05,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-28 03:04:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-11-28 03:04:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-28 03:04:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 118 transitions. [2020-11-28 03:04:05,971 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 118 transitions. Word has length 18 [2020-11-28 03:04:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:05,971 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 118 transitions. [2020-11-28 03:04:05,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:05,972 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 118 transitions. [2020-11-28 03:04:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:04:05,973 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:05,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:05,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:04:05,973 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:05,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1031667066, now seen corresponding path program 1 times [2020-11-28 03:04:05,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:05,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960599833] [2020-11-28 03:04:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:06,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:06,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960599833] [2020-11-28 03:04:06,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:06,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:06,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992357146] [2020-11-28 03:04:06,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:06,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:06,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:06,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:06,068 INFO L87 Difference]: Start difference. First operand 76 states and 118 transitions. Second operand 4 states. [2020-11-28 03:04:06,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:06,208 INFO L93 Difference]: Finished difference Result 93 states and 145 transitions. [2020-11-28 03:04:06,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:06,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-28 03:04:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:06,210 INFO L225 Difference]: With dead ends: 93 [2020-11-28 03:04:06,210 INFO L226 Difference]: Without dead ends: 93 [2020-11-28 03:04:06,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-28 03:04:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-11-28 03:04:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-28 03:04:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 116 transitions. [2020-11-28 03:04:06,227 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 116 transitions. Word has length 18 [2020-11-28 03:04:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:06,228 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 116 transitions. [2020-11-28 03:04:06,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 116 transitions. [2020-11-28 03:04:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 03:04:06,231 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:06,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:06,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 03:04:06,232 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:06,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:06,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1530549219, now seen corresponding path program 1 times [2020-11-28 03:04:06,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:06,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244922414] [2020-11-28 03:04:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:06,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:06,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244922414] [2020-11-28 03:04:06,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:06,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:06,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053924915] [2020-11-28 03:04:06,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:06,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:06,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:06,341 INFO L87 Difference]: Start difference. First operand 76 states and 116 transitions. Second operand 4 states. [2020-11-28 03:04:06,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:06,494 INFO L93 Difference]: Finished difference Result 129 states and 199 transitions. [2020-11-28 03:04:06,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:06,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-28 03:04:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:06,497 INFO L225 Difference]: With dead ends: 129 [2020-11-28 03:04:06,497 INFO L226 Difference]: Without dead ends: 129 [2020-11-28 03:04:06,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:06,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-28 03:04:06,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 104. [2020-11-28 03:04:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-11-28 03:04:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 158 transitions. [2020-11-28 03:04:06,526 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 158 transitions. Word has length 19 [2020-11-28 03:04:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:06,527 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 158 transitions. [2020-11-28 03:04:06,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 158 transitions. [2020-11-28 03:04:06,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 03:04:06,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:06,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:06,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 03:04:06,530 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:06,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:06,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2084359707, now seen corresponding path program 1 times [2020-11-28 03:04:06,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:06,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371285413] [2020-11-28 03:04:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:06,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:06,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371285413] [2020-11-28 03:04:06,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:06,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:06,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761339124] [2020-11-28 03:04:06,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:06,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:06,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:06,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:06,629 INFO L87 Difference]: Start difference. First operand 104 states and 158 transitions. Second operand 4 states. [2020-11-28 03:04:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:06,765 INFO L93 Difference]: Finished difference Result 137 states and 201 transitions. [2020-11-28 03:04:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:06,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-28 03:04:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:06,767 INFO L225 Difference]: With dead ends: 137 [2020-11-28 03:04:06,768 INFO L226 Difference]: Without dead ends: 137 [2020-11-28 03:04:06,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-11-28 03:04:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-11-28 03:04:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-28 03:04:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 200 transitions. [2020-11-28 03:04:06,780 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 200 transitions. Word has length 19 [2020-11-28 03:04:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:06,781 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 200 transitions. [2020-11-28 03:04:06,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 200 transitions. [2020-11-28 03:04:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:04:06,783 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:06,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:06,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 03:04:06,784 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:06,784 INFO L82 PathProgramCache]: Analyzing trace with hash 209064359, now seen corresponding path program 1 times [2020-11-28 03:04:06,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:06,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738483898] [2020-11-28 03:04:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:06,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:06,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738483898] [2020-11-28 03:04:06,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:06,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:06,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510112900] [2020-11-28 03:04:06,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:06,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:06,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:06,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:06,846 INFO L87 Difference]: Start difference. First operand 136 states and 200 transitions. Second operand 4 states. [2020-11-28 03:04:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:06,981 INFO L93 Difference]: Finished difference Result 143 states and 205 transitions. [2020-11-28 03:04:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:06,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-28 03:04:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:06,983 INFO L225 Difference]: With dead ends: 143 [2020-11-28 03:04:06,983 INFO L226 Difference]: Without dead ends: 143 [2020-11-28 03:04:06,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:06,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-28 03:04:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-11-28 03:04:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-11-28 03:04:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 204 transitions. [2020-11-28 03:04:07,001 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 204 transitions. Word has length 20 [2020-11-28 03:04:07,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:07,002 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 204 transitions. [2020-11-28 03:04:07,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 204 transitions. [2020-11-28 03:04:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:04:07,003 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:07,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:07,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 03:04:07,004 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:07,005 INFO L82 PathProgramCache]: Analyzing trace with hash -183962651, now seen corresponding path program 1 times [2020-11-28 03:04:07,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:07,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138392347] [2020-11-28 03:04:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:07,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:07,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138392347] [2020-11-28 03:04:07,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:07,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:07,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259221496] [2020-11-28 03:04:07,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:07,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:07,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:07,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:07,093 INFO L87 Difference]: Start difference. First operand 142 states and 204 transitions. Second operand 4 states. [2020-11-28 03:04:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:07,237 INFO L93 Difference]: Finished difference Result 235 states and 333 transitions. [2020-11-28 03:04:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:07,238 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-28 03:04:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:07,240 INFO L225 Difference]: With dead ends: 235 [2020-11-28 03:04:07,240 INFO L226 Difference]: Without dead ends: 235 [2020-11-28 03:04:07,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-11-28 03:04:07,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 202. [2020-11-28 03:04:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-11-28 03:04:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 284 transitions. [2020-11-28 03:04:07,261 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 284 transitions. Word has length 20 [2020-11-28 03:04:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:07,261 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 284 transitions. [2020-11-28 03:04:07,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 284 transitions. [2020-11-28 03:04:07,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:04:07,263 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:07,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:07,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 03:04:07,264 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:07,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:07,265 INFO L82 PathProgramCache]: Analyzing trace with hash 496095719, now seen corresponding path program 1 times [2020-11-28 03:04:07,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:07,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809532096] [2020-11-28 03:04:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:07,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:07,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809532096] [2020-11-28 03:04:07,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:07,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:07,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828282310] [2020-11-28 03:04:07,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:07,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:07,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:07,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:07,361 INFO L87 Difference]: Start difference. First operand 202 states and 284 transitions. Second operand 4 states. [2020-11-28 03:04:07,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:07,491 INFO L93 Difference]: Finished difference Result 259 states and 345 transitions. [2020-11-28 03:04:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:07,492 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-28 03:04:07,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:07,494 INFO L225 Difference]: With dead ends: 259 [2020-11-28 03:04:07,494 INFO L226 Difference]: Without dead ends: 259 [2020-11-28 03:04:07,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:07,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-11-28 03:04:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2020-11-28 03:04:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-11-28 03:04:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 344 transitions. [2020-11-28 03:04:07,508 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 344 transitions. Word has length 20 [2020-11-28 03:04:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:07,509 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 344 transitions. [2020-11-28 03:04:07,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 344 transitions. [2020-11-28 03:04:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:04:07,512 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:07,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:07,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 03:04:07,513 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:07,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1401185488, now seen corresponding path program 1 times [2020-11-28 03:04:07,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:07,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550661002] [2020-11-28 03:04:07,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:07,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:07,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550661002] [2020-11-28 03:04:07,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:07,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:07,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773158743] [2020-11-28 03:04:07,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:07,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:07,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:07,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:07,590 INFO L87 Difference]: Start difference. First operand 258 states and 344 transitions. Second operand 4 states. [2020-11-28 03:04:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:07,701 INFO L93 Difference]: Finished difference Result 267 states and 345 transitions. [2020-11-28 03:04:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:07,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-28 03:04:07,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:07,703 INFO L225 Difference]: With dead ends: 267 [2020-11-28 03:04:07,703 INFO L226 Difference]: Without dead ends: 267 [2020-11-28 03:04:07,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-11-28 03:04:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2020-11-28 03:04:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-11-28 03:04:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 344 transitions. [2020-11-28 03:04:07,713 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 344 transitions. Word has length 21 [2020-11-28 03:04:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:07,713 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 344 transitions. [2020-11-28 03:04:07,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 344 transitions. [2020-11-28 03:04:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:04:07,714 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:07,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:07,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 03:04:07,715 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:07,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:07,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1794212498, now seen corresponding path program 1 times [2020-11-28 03:04:07,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:07,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225931820] [2020-11-28 03:04:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:07,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:07,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225931820] [2020-11-28 03:04:07,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:07,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:07,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508973866] [2020-11-28 03:04:07,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:07,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:07,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:07,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:07,796 INFO L87 Difference]: Start difference. First operand 266 states and 344 transitions. Second operand 4 states. [2020-11-28 03:04:07,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:07,921 INFO L93 Difference]: Finished difference Result 426 states and 528 transitions. [2020-11-28 03:04:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:07,922 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-28 03:04:07,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:07,925 INFO L225 Difference]: With dead ends: 426 [2020-11-28 03:04:07,925 INFO L226 Difference]: Without dead ends: 426 [2020-11-28 03:04:07,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:07,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-11-28 03:04:07,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 394. [2020-11-28 03:04:07,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-11-28 03:04:07,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 496 transitions. [2020-11-28 03:04:07,939 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 496 transitions. Word has length 21 [2020-11-28 03:04:07,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:07,939 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 496 transitions. [2020-11-28 03:04:07,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:07,940 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 496 transitions. [2020-11-28 03:04:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:04:07,945 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:07,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:07,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 03:04:07,947 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:04:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:07,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1114154128, now seen corresponding path program 1 times [2020-11-28 03:04:07,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:07,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7113188] [2020-11-28 03:04:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:08,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:08,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7113188] [2020-11-28 03:04:08,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:08,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:08,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612584298] [2020-11-28 03:04:08,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:08,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:08,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:08,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:08,037 INFO L87 Difference]: Start difference. First operand 394 states and 496 transitions. Second operand 4 states. [2020-11-28 03:04:08,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:08,143 INFO L93 Difference]: Finished difference Result 487 states and 566 transitions. [2020-11-28 03:04:08,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:08,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-28 03:04:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:08,145 INFO L225 Difference]: With dead ends: 487 [2020-11-28 03:04:08,145 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:04:08,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:08,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:04:08,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:04:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:04:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:04:08,146 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-11-28 03:04:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:08,146 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:04:08,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:04:08,146 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:04:08,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 03:04:08,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:04:08 BoogieIcfgContainer [2020-11-28 03:04:08,154 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:04:08,154 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:04:08,155 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:04:08,155 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:04:08,156 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:04:03" (3/4) ... [2020-11-28 03:04:08,159 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:04:08,167 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-11-28 03:04:08,167 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-28 03:04:08,167 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-28 03:04:08,178 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-28 03:04:08,179 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:04:08,179 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 03:04:08,179 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:04:08,258 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_18393a01-48aa-40c4-b04b-a9695f43df0e/bin/uautomizer/witness.graphml [2020-11-28 03:04:08,259 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:04:08,261 INFO L168 Benchmark]: Toolchain (without parser) took 5365.30 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 55.6 MB in the beginning and 46.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 34.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:08,262 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory was 63.0 MB in the beginning and 62.9 MB in the end (delta: 27.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:04:08,263 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.08 ms. Allocated memory is still 90.2 MB. Free memory was 55.4 MB in the beginning and 67.2 MB in the end (delta: -11.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:08,263 INFO L168 Benchmark]: Boogie Preprocessor took 42.28 ms. Allocated memory is still 90.2 MB. Free memory was 67.2 MB in the beginning and 65.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:08,264 INFO L168 Benchmark]: RCFGBuilder took 524.10 ms. Allocated memory is still 90.2 MB. Free memory was 65.5 MB in the beginning and 49.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:08,264 INFO L168 Benchmark]: TraceAbstraction took 4355.49 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 49.1 MB in the beginning and 49.3 MB in the end (delta: -236.8 kB). Peak memory consumption was 27.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:08,264 INFO L168 Benchmark]: Witness Printer took 104.34 ms. Allocated memory is still 115.3 MB. Free memory was 49.3 MB in the beginning and 46.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:08,267 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory was 63.0 MB in the beginning and 62.9 MB in the end (delta: 27.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 330.08 ms. Allocated memory is still 90.2 MB. Free memory was 55.4 MB in the beginning and 67.2 MB in the end (delta: -11.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.28 ms. Allocated memory is still 90.2 MB. Free memory was 67.2 MB in the beginning and 65.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 524.10 ms. Allocated memory is still 90.2 MB. Free memory was 65.5 MB in the beginning and 49.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4355.49 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 49.1 MB in the beginning and 49.3 MB in the end (delta: -236.8 kB). Peak memory consumption was 27.0 MB. Max. memory is 16.1 GB. * Witness Printer took 104.34 ms. Allocated memory is still 115.3 MB. Free memory was 49.3 MB in the beginning and 46.2 MB in the end (delta: 3.1 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, 35 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 662 SDtfs, 848 SDslu, 101 SDs, 0 SdLazy, 451 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=394occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 125 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 258 NumberOfCodeBlocks, 258 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 244 ConstructedInterpolants, 0 QuantifiedInterpolants, 14514 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...