./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_b2e3b863-de6a-4d91-b53a-70706484730b/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/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 [2020-11-29 23:36:56,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:36:56,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:36:56,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:36:56,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:36:56,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:36:56,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:36:56,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:36:56,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:36:56,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:36:56,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:36:56,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:36:56,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:36:56,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:36:56,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:36:56,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:36:56,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:36:56,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:36:56,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:36:56,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:36:56,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:36:56,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:36:56,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:36:56,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:36:56,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:36:56,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:36:56,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:36:56,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:36:56,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:36:56,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:36:56,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:36:56,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:36:56,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:36:56,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:36:56,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:36:56,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:36:56,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:36:56,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:36:56,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:36:56,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:36:56,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:36:56,724 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 23:36:56,767 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:36:56,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:36:56,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:36:56,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:36:56,770 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:36:56,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:36:56,771 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:36:56,771 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:36:56,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:36:56,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:36:56,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:36:56,773 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 23:36:56,773 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 23:36:56,774 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 23:36:56,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:36:56,774 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 23:36:56,774 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:36:56,775 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:36:56,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:36:56,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:36:56,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:36:56,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:36:56,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:36:56,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:36:56,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:36:56,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:36:56,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:36:56,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:36:56,777 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_b2e3b863-de6a-4d91-b53a-70706484730b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d28fd50bd3f7e49bee026aec860ad9015a4fdfba [2020-11-29 23:36:57,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:36:57,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:36:57,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:36:57,154 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:36:57,155 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:36:57,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/bin/uautomizer/../../sv-benchmarks/c/locks/test_locks_5.c [2020-11-29 23:36:57,248 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/bin/uautomizer/data/8d492f3d9/713d9540d7514feab7a18f2cec2f17f4/FLAG62ca71fa5 [2020-11-29 23:36:57,742 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:36:57,743 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/sv-benchmarks/c/locks/test_locks_5.c [2020-11-29 23:36:57,750 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/bin/uautomizer/data/8d492f3d9/713d9540d7514feab7a18f2cec2f17f4/FLAG62ca71fa5 [2020-11-29 23:36:58,106 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/bin/uautomizer/data/8d492f3d9/713d9540d7514feab7a18f2cec2f17f4 [2020-11-29 23:36:58,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:36:58,111 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 23:36:58,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:36:58,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:36:58,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:36:58,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:36:58" (1/1) ... [2020-11-29 23:36:58,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@219d548e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:58, skipping insertion in model container [2020-11-29 23:36:58,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:36:58" (1/1) ... [2020-11-29 23:36:58,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:36:58,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:36:58,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:36:58,348 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:36:58,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:36:58,415 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:36:58,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:58 WrapperNode [2020-11-29 23:36:58,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:36:58,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:36:58,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:36:58,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:36:58,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:58" (1/1) ... [2020-11-29 23:36:58,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:58" (1/1) ... [2020-11-29 23:36:58,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:58" (1/1) ... [2020-11-29 23:36:58,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:58" (1/1) ... [2020-11-29 23:36:58,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:58" (1/1) ... [2020-11-29 23:36:58,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:58" (1/1) ... [2020-11-29 23:36:58,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:58" (1/1) ... [2020-11-29 23:36:58,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:36:58,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:36:58,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:36:58,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:36:58,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/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 [2020-11-29 23:36:58,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 23:36:58,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:36:58,545 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-29 23:36:58,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 23:36:58,546 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 23:36:58,546 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-29 23:36:58,546 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-29 23:36:58,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:36:58,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 23:36:58,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 23:36:58,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 23:36:58,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:36:58,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:36:58,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 23:36:58,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 23:36:58,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 23:36:59,011 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:36:59,011 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-29 23:36:59,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:36:59 BoogieIcfgContainer [2020-11-29 23:36:59,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:36:59,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:36:59,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:36:59,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:36:59,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:36:58" (1/3) ... [2020-11-29 23:36:59,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61386f18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:36:59, skipping insertion in model container [2020-11-29 23:36:59,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:58" (2/3) ... [2020-11-29 23:36:59,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61386f18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:36:59, skipping insertion in model container [2020-11-29 23:36:59,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:36:59" (3/3) ... [2020-11-29 23:36:59,023 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-11-29 23:36:59,034 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:36:59,039 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 23:36:59,051 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 23:36:59,070 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:36:59,070 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 23:36:59,071 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:36:59,071 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:36:59,071 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:36:59,071 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:36:59,071 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:36:59,071 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:36:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-11-29 23:36:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 23:36:59,093 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:59,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:59,095 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash -55357090, now seen corresponding path program 1 times [2020-11-29 23:36:59,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:59,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931594286] [2020-11-29 23:36:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:59,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:59,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931594286] [2020-11-29 23:36:59,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:59,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:36:59,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125869437] [2020-11-29 23:36:59,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:36:59,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:59,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:36:59,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:36:59,456 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-11-29 23:36:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:59,505 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2020-11-29 23:36:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:36:59,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-29 23:36:59,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:59,517 INFO L225 Difference]: With dead ends: 31 [2020-11-29 23:36:59,517 INFO L226 Difference]: Without dead ends: 26 [2020-11-29 23:36:59,519 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 [2020-11-29 23:36:59,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-29 23:36:59,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-29 23:36:59,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 23:36:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 40 transitions. [2020-11-29 23:36:59,556 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 40 transitions. Word has length 9 [2020-11-29 23:36:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:59,557 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 40 transitions. [2020-11-29 23:36:59,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:36:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 40 transitions. [2020-11-29 23:36:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 23:36:59,558 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:59,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:59,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:36:59,559 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:59,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:59,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2007343126, now seen corresponding path program 1 times [2020-11-29 23:36:59,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:59,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153300406] [2020-11-29 23:36:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:59,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:59,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153300406] [2020-11-29 23:36:59,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:59,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:59,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782426902] [2020-11-29 23:36:59,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:59,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:59,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:59,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:59,686 INFO L87 Difference]: Start difference. First operand 26 states and 40 transitions. Second operand 4 states. [2020-11-29 23:36:59,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:59,868 INFO L93 Difference]: Finished difference Result 43 states and 70 transitions. [2020-11-29 23:36:59,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:59,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-29 23:36:59,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:59,871 INFO L225 Difference]: With dead ends: 43 [2020-11-29 23:36:59,871 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 23:36:59,872 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 [2020-11-29 23:36:59,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 23:36:59,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2020-11-29 23:36:59,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-29 23:36:59,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 51 transitions. [2020-11-29 23:36:59,879 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 51 transitions. Word has length 17 [2020-11-29 23:36:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:59,879 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 51 transitions. [2020-11-29 23:36:59,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 51 transitions. [2020-11-29 23:36:59,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 23:36:59,880 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:59,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:59,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:36:59,881 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:59,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:59,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1607565800, now seen corresponding path program 1 times [2020-11-29 23:36:59,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:59,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654341936] [2020-11-29 23:36:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:59,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:59,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654341936] [2020-11-29 23:37:00,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:00,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:37:00,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161570876] [2020-11-29 23:37:00,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:00,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:00,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:00,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:00,012 INFO L87 Difference]: Start difference. First operand 32 states and 51 transitions. Second operand 4 states. [2020-11-29 23:37:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:00,163 INFO L93 Difference]: Finished difference Result 43 states and 68 transitions. [2020-11-29 23:37:00,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:37:00,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-29 23:37:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:00,165 INFO L225 Difference]: With dead ends: 43 [2020-11-29 23:37:00,166 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 23:37:00,166 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 [2020-11-29 23:37:00,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 23:37:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-11-29 23:37:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 23:37:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 67 transitions. [2020-11-29 23:37:00,177 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 67 transitions. Word has length 17 [2020-11-29 23:37:00,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:00,178 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 67 transitions. [2020-11-29 23:37:00,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:00,178 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 67 transitions. [2020-11-29 23:37:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 23:37:00,180 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:00,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:37:00,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 23:37:00,183 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:00,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:00,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2104752446, now seen corresponding path program 1 times [2020-11-29 23:37:00,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:00,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469733319] [2020-11-29 23:37:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:00,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:37:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:37:00,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469733319] [2020-11-29 23:37:00,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:00,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:37:00,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231008251] [2020-11-29 23:37:00,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:00,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:00,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:00,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:00,287 INFO L87 Difference]: Start difference. First operand 42 states and 67 transitions. Second operand 4 states. [2020-11-29 23:37:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:00,430 INFO L93 Difference]: Finished difference Result 46 states and 70 transitions. [2020-11-29 23:37:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:37:00,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-29 23:37:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:00,432 INFO L225 Difference]: With dead ends: 46 [2020-11-29 23:37:00,432 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 23:37:00,432 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 [2020-11-29 23:37:00,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 23:37:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-11-29 23:37:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 23:37:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2020-11-29 23:37:00,439 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 18 [2020-11-29 23:37:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:00,439 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2020-11-29 23:37:00,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2020-11-29 23:37:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 23:37:00,440 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:00,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:37:00,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 23:37:00,441 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:00,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1711725436, now seen corresponding path program 1 times [2020-11-29 23:37:00,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:00,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839142531] [2020-11-29 23:37:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:00,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:37:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:37:00,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839142531] [2020-11-29 23:37:00,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:00,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:37:00,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588346232] [2020-11-29 23:37:00,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:00,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:00,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:00,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:00,546 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand 4 states. [2020-11-29 23:37:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:00,683 INFO L93 Difference]: Finished difference Result 77 states and 119 transitions. [2020-11-29 23:37:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:37:00,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-29 23:37:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:00,687 INFO L225 Difference]: With dead ends: 77 [2020-11-29 23:37:00,687 INFO L226 Difference]: Without dead ends: 77 [2020-11-29 23:37:00,687 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 [2020-11-29 23:37:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-29 23:37:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-11-29 23:37:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 23:37:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 118 transitions. [2020-11-29 23:37:00,701 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 118 transitions. Word has length 18 [2020-11-29 23:37:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:00,701 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 118 transitions. [2020-11-29 23:37:00,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:00,701 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 118 transitions. [2020-11-29 23:37:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 23:37:00,702 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:00,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:37:00,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 23:37:00,703 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:00,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:00,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1031667066, now seen corresponding path program 1 times [2020-11-29 23:37:00,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:00,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655054996] [2020-11-29 23:37:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:00,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:37:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:37:00,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655054996] [2020-11-29 23:37:00,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:00,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:37:00,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907877795] [2020-11-29 23:37:00,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:00,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:00,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:00,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:00,783 INFO L87 Difference]: Start difference. First operand 76 states and 118 transitions. Second operand 4 states. [2020-11-29 23:37:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:00,909 INFO L93 Difference]: Finished difference Result 93 states and 145 transitions. [2020-11-29 23:37:00,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:37:00,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-29 23:37:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:00,911 INFO L225 Difference]: With dead ends: 93 [2020-11-29 23:37:00,911 INFO L226 Difference]: Without dead ends: 93 [2020-11-29 23:37:00,911 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 [2020-11-29 23:37:00,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-29 23:37:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-11-29 23:37:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 23:37:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 116 transitions. [2020-11-29 23:37:00,922 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 116 transitions. Word has length 18 [2020-11-29 23:37:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:00,923 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 116 transitions. [2020-11-29 23:37:00,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:00,923 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 116 transitions. [2020-11-29 23:37:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 23:37:00,924 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:00,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:37:00,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 23:37:00,924 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:00,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1530549219, now seen corresponding path program 1 times [2020-11-29 23:37:00,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:00,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963933994] [2020-11-29 23:37:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:01,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:37:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:37:01,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963933994] [2020-11-29 23:37:01,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:01,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:37:01,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162225689] [2020-11-29 23:37:01,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:01,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:01,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:01,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:01,017 INFO L87 Difference]: Start difference. First operand 76 states and 116 transitions. Second operand 4 states. [2020-11-29 23:37:01,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:01,149 INFO L93 Difference]: Finished difference Result 129 states and 199 transitions. [2020-11-29 23:37:01,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:37:01,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-29 23:37:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:01,152 INFO L225 Difference]: With dead ends: 129 [2020-11-29 23:37:01,152 INFO L226 Difference]: Without dead ends: 129 [2020-11-29 23:37:01,152 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 [2020-11-29 23:37:01,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-29 23:37:01,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 104. [2020-11-29 23:37:01,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-11-29 23:37:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 158 transitions. [2020-11-29 23:37:01,165 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 158 transitions. Word has length 19 [2020-11-29 23:37:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:01,165 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 158 transitions. [2020-11-29 23:37:01,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 158 transitions. [2020-11-29 23:37:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 23:37:01,167 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:01,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:37:01,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 23:37:01,167 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:01,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2084359707, now seen corresponding path program 1 times [2020-11-29 23:37:01,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:01,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493895965] [2020-11-29 23:37:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:01,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:37:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:37:01,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493895965] [2020-11-29 23:37:01,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:01,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:37:01,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439097829] [2020-11-29 23:37:01,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:01,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:01,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:01,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:01,248 INFO L87 Difference]: Start difference. First operand 104 states and 158 transitions. Second operand 4 states. [2020-11-29 23:37:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:01,382 INFO L93 Difference]: Finished difference Result 137 states and 201 transitions. [2020-11-29 23:37:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:37:01,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-29 23:37:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:01,385 INFO L225 Difference]: With dead ends: 137 [2020-11-29 23:37:01,385 INFO L226 Difference]: Without dead ends: 137 [2020-11-29 23:37:01,385 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 [2020-11-29 23:37:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-11-29 23:37:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-11-29 23:37:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-29 23:37:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 200 transitions. [2020-11-29 23:37:01,402 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 200 transitions. Word has length 19 [2020-11-29 23:37:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:01,402 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 200 transitions. [2020-11-29 23:37:01,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 200 transitions. [2020-11-29 23:37:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 23:37:01,404 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:01,404 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] [2020-11-29 23:37:01,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 23:37:01,404 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:01,405 INFO L82 PathProgramCache]: Analyzing trace with hash 209064359, now seen corresponding path program 1 times [2020-11-29 23:37:01,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:01,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358074187] [2020-11-29 23:37:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:01,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:37:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:37:01,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358074187] [2020-11-29 23:37:01,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:01,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:37:01,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029296896] [2020-11-29 23:37:01,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:01,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:01,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:01,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:01,498 INFO L87 Difference]: Start difference. First operand 136 states and 200 transitions. Second operand 4 states. [2020-11-29 23:37:01,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:01,625 INFO L93 Difference]: Finished difference Result 143 states and 205 transitions. [2020-11-29 23:37:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:37:01,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-29 23:37:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:01,627 INFO L225 Difference]: With dead ends: 143 [2020-11-29 23:37:01,627 INFO L226 Difference]: Without dead ends: 143 [2020-11-29 23:37:01,628 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 [2020-11-29 23:37:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-29 23:37:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-11-29 23:37:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-11-29 23:37:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 204 transitions. [2020-11-29 23:37:01,649 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 204 transitions. Word has length 20 [2020-11-29 23:37:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:01,655 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 204 transitions. [2020-11-29 23:37:01,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 204 transitions. [2020-11-29 23:37:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 23:37:01,656 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:01,656 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] [2020-11-29 23:37:01,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 23:37:01,656 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash -183962651, now seen corresponding path program 1 times [2020-11-29 23:37:01,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:01,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914665854] [2020-11-29 23:37:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:01,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:37:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:37:01,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914665854] [2020-11-29 23:37:01,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:01,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:37:01,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10905630] [2020-11-29 23:37:01,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:01,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:01,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:01,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:01,723 INFO L87 Difference]: Start difference. First operand 142 states and 204 transitions. Second operand 4 states. [2020-11-29 23:37:01,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:01,847 INFO L93 Difference]: Finished difference Result 235 states and 333 transitions. [2020-11-29 23:37:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:37:01,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-29 23:37:01,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:01,850 INFO L225 Difference]: With dead ends: 235 [2020-11-29 23:37:01,850 INFO L226 Difference]: Without dead ends: 235 [2020-11-29 23:37:01,850 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 [2020-11-29 23:37:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-11-29 23:37:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 202. [2020-11-29 23:37:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-11-29 23:37:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 284 transitions. [2020-11-29 23:37:01,868 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 284 transitions. Word has length 20 [2020-11-29 23:37:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:01,870 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 284 transitions. [2020-11-29 23:37:01,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:01,871 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 284 transitions. [2020-11-29 23:37:01,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 23:37:01,872 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:01,872 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] [2020-11-29 23:37:01,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 23:37:01,873 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:01,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:01,874 INFO L82 PathProgramCache]: Analyzing trace with hash 496095719, now seen corresponding path program 1 times [2020-11-29 23:37:01,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:01,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269553648] [2020-11-29 23:37:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:01,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:37:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:37:01,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269553648] [2020-11-29 23:37:01,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:01,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:37:01,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001612938] [2020-11-29 23:37:01,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:01,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:01,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:01,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:01,963 INFO L87 Difference]: Start difference. First operand 202 states and 284 transitions. Second operand 4 states. [2020-11-29 23:37:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:02,083 INFO L93 Difference]: Finished difference Result 259 states and 345 transitions. [2020-11-29 23:37:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:37:02,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-29 23:37:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:02,085 INFO L225 Difference]: With dead ends: 259 [2020-11-29 23:37:02,086 INFO L226 Difference]: Without dead ends: 259 [2020-11-29 23:37:02,086 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 [2020-11-29 23:37:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-11-29 23:37:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2020-11-29 23:37:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-11-29 23:37:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 344 transitions. [2020-11-29 23:37:02,101 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 344 transitions. Word has length 20 [2020-11-29 23:37:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:02,102 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 344 transitions. [2020-11-29 23:37:02,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:02,102 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 344 transitions. [2020-11-29 23:37:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 23:37:02,108 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:02,108 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] [2020-11-29 23:37:02,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 23:37:02,108 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1401185488, now seen corresponding path program 1 times [2020-11-29 23:37:02,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:02,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237540071] [2020-11-29 23:37:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:02,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:37:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:37:02,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237540071] [2020-11-29 23:37:02,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:02,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:37:02,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713950862] [2020-11-29 23:37:02,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:02,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:02,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:02,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:02,186 INFO L87 Difference]: Start difference. First operand 258 states and 344 transitions. Second operand 4 states. [2020-11-29 23:37:02,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:02,296 INFO L93 Difference]: Finished difference Result 267 states and 345 transitions. [2020-11-29 23:37:02,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:37:02,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-29 23:37:02,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:02,299 INFO L225 Difference]: With dead ends: 267 [2020-11-29 23:37:02,299 INFO L226 Difference]: Without dead ends: 267 [2020-11-29 23:37:02,299 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 [2020-11-29 23:37:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-11-29 23:37:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2020-11-29 23:37:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-11-29 23:37:02,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 344 transitions. [2020-11-29 23:37:02,308 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 344 transitions. Word has length 21 [2020-11-29 23:37:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:02,312 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 344 transitions. [2020-11-29 23:37:02,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 344 transitions. [2020-11-29 23:37:02,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 23:37:02,316 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:02,316 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] [2020-11-29 23:37:02,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-29 23:37:02,316 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:02,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1794212498, now seen corresponding path program 1 times [2020-11-29 23:37:02,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:02,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872745683] [2020-11-29 23:37:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:02,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:37:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:37:02,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872745683] [2020-11-29 23:37:02,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:02,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:37:02,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567542522] [2020-11-29 23:37:02,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:02,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:02,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:02,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:02,392 INFO L87 Difference]: Start difference. First operand 266 states and 344 transitions. Second operand 4 states. [2020-11-29 23:37:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:02,496 INFO L93 Difference]: Finished difference Result 426 states and 528 transitions. [2020-11-29 23:37:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:37:02,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-29 23:37:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:02,499 INFO L225 Difference]: With dead ends: 426 [2020-11-29 23:37:02,499 INFO L226 Difference]: Without dead ends: 426 [2020-11-29 23:37:02,500 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 [2020-11-29 23:37:02,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-11-29 23:37:02,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 394. [2020-11-29 23:37:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-11-29 23:37:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 496 transitions. [2020-11-29 23:37:02,512 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 496 transitions. Word has length 21 [2020-11-29 23:37:02,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:02,514 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 496 transitions. [2020-11-29 23:37:02,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 496 transitions. [2020-11-29 23:37:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 23:37:02,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:02,516 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] [2020-11-29 23:37:02,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-29 23:37:02,516 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:02,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1114154128, now seen corresponding path program 1 times [2020-11-29 23:37:02,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:02,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099837240] [2020-11-29 23:37:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:02,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:37:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:37:02,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099837240] [2020-11-29 23:37:02,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:02,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:37:02,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413349109] [2020-11-29 23:37:02,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:02,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:02,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:02,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:02,587 INFO L87 Difference]: Start difference. First operand 394 states and 496 transitions. Second operand 4 states. [2020-11-29 23:37:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:02,689 INFO L93 Difference]: Finished difference Result 487 states and 566 transitions. [2020-11-29 23:37:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:37:02,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-29 23:37:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:02,690 INFO L225 Difference]: With dead ends: 487 [2020-11-29 23:37:02,691 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 23:37:02,691 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 [2020-11-29 23:37:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 23:37:02,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 23:37:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 23:37:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 23:37:02,692 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-11-29 23:37:02,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:02,692 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:37:02,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:02,692 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 23:37:02,692 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 23:37:02,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-29 23:37:02,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:37:02 BoogieIcfgContainer [2020-11-29 23:37:02,697 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:37:02,698 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:37:02,698 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:37:02,698 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:37:02,699 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:36:59" (3/4) ... [2020-11-29 23:37:02,702 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 23:37:02,709 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-11-29 23:37:02,710 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-29 23:37:02,710 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-29 23:37:02,721 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-29 23:37:02,721 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 23:37:02,721 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-29 23:37:02,722 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 23:37:02,792 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b2e3b863-de6a-4d91-b53a-70706484730b/bin/uautomizer/witness.graphml [2020-11-29 23:37:02,792 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:37:02,795 INFO L168 Benchmark]: Toolchain (without parser) took 4682.95 ms. Allocated memory was 88.1 MB in the beginning and 134.2 MB in the end (delta: 46.1 MB). Free memory was 56.8 MB in the beginning and 40.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 63.3 MB. Max. memory is 16.1 GB. [2020-11-29 23:37:02,795 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 88.1 MB. Free memory was 62.4 MB in the beginning and 62.4 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:37:02,796 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.12 ms. Allocated memory is still 88.1 MB. Free memory was 56.6 MB in the beginning and 66.5 MB in the end (delta: -9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:37:02,796 INFO L168 Benchmark]: Boogie Preprocessor took 47.05 ms. Allocated memory is still 88.1 MB. Free memory was 66.5 MB in the beginning and 64.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:37:02,797 INFO L168 Benchmark]: RCFGBuilder took 546.49 ms. Allocated memory is still 88.1 MB. Free memory was 64.8 MB in the beginning and 48.9 MB in the end (delta: 15.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 23:37:02,797 INFO L168 Benchmark]: TraceAbstraction took 3681.89 ms. Allocated memory was 88.1 MB in the beginning and 134.2 MB in the end (delta: 46.1 MB). Free memory was 48.4 MB in the beginning and 43.4 MB in the end (delta: 4.9 MB). Peak memory consumption was 51.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:37:02,798 INFO L168 Benchmark]: Witness Printer took 94.99 ms. Allocated memory is still 134.2 MB. Free memory was 43.4 MB in the beginning and 40.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 23:37:02,800 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 88.1 MB. Free memory was 62.4 MB in the beginning and 62.4 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.12 ms. Allocated memory is still 88.1 MB. Free memory was 56.6 MB in the beginning and 66.5 MB in the end (delta: -9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.05 ms. Allocated memory is still 88.1 MB. Free memory was 66.5 MB in the beginning and 64.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 546.49 ms. Allocated memory is still 88.1 MB. Free memory was 64.8 MB in the beginning and 48.9 MB in the end (delta: 15.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3681.89 ms. Allocated memory was 88.1 MB in the beginning and 134.2 MB in the end (delta: 46.1 MB). Free memory was 48.4 MB in the beginning and 43.4 MB in the end (delta: 4.9 MB). Peak memory consumption was 51.5 MB. Max. memory is 16.1 GB. * Witness Printer took 94.99 ms. Allocated memory is still 134.2 MB. Free memory was 43.4 MB in the beginning and 40.3 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: 3.6s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 1.8s, 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, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s 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: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 125 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s 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...