./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_11.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_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_11.c -s /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/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 a93221bc263791497331acd2a7a0150037c621aa ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:17:24,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:17:24,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:17:24,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:17:24,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:17:24,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:17:24,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:17:24,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:17:24,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:17:24,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:17:24,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:17:24,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:17:24,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:17:24,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:17:24,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:17:24,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:17:24,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:17:24,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:17:24,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:17:24,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:17:24,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:17:24,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:17:24,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:17:24,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:17:24,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:17:24,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:17:24,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:17:24,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:17:24,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:17:24,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:17:24,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:17:24,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:17:24,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:17:24,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:17:24,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:17:24,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:17:24,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:17:24,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:17:24,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:17:24,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:17:24,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:17:24,727 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:17:24,763 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:17:24,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:17:24,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:17:24,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:17:24,765 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:17:24,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:17:24,766 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:17:24,766 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:17:24,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:17:24,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:17:24,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:17:24,768 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:17:24,768 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:17:24,768 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:17:24,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:17:24,768 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:17:24,769 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:17:24,769 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:17:24,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:17:24,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:17:24,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:17:24,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:17:24,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:17:24,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:17:24,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:17:24,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:17:24,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:17:24,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:17:24,771 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_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a93221bc263791497331acd2a7a0150037c621aa [2020-11-28 03:17:25,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:17:25,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:17:25,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:17:25,090 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:17:25,091 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:17:25,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/bin/uautomizer/../../sv-benchmarks/c/locks/test_locks_11.c [2020-11-28 03:17:25,166 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/bin/uautomizer/data/d1e4adef5/02f396a39d4e4e6caa9b77b63c277bb5/FLAG8ca858aa6 [2020-11-28 03:17:25,553 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:17:25,554 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/sv-benchmarks/c/locks/test_locks_11.c [2020-11-28 03:17:25,561 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/bin/uautomizer/data/d1e4adef5/02f396a39d4e4e6caa9b77b63c277bb5/FLAG8ca858aa6 [2020-11-28 03:17:25,969 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/bin/uautomizer/data/d1e4adef5/02f396a39d4e4e6caa9b77b63c277bb5 [2020-11-28 03:17:25,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:17:25,972 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:17:25,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:17:25,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:17:25,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:17:25,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:17:25" (1/1) ... [2020-11-28 03:17:25,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40255910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:25, skipping insertion in model container [2020-11-28 03:17:25,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:17:25" (1/1) ... [2020-11-28 03:17:26,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:17:26,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:17:26,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:17:26,306 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:17:26,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:17:26,371 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:17:26,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:26 WrapperNode [2020-11-28 03:17:26,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:17:26,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:17:26,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:17:26,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:17:26,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:26" (1/1) ... [2020-11-28 03:17:26,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:26" (1/1) ... [2020-11-28 03:17:26,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:26" (1/1) ... [2020-11-28 03:17:26,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:26" (1/1) ... [2020-11-28 03:17:26,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:26" (1/1) ... [2020-11-28 03:17:26,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:26" (1/1) ... [2020-11-28 03:17:26,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:26" (1/1) ... [2020-11-28 03:17:26,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:17:26,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:17:26,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:17:26,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:17:26,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:17:26,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:17:26,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:17:26,509 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-28 03:17:26,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:17:26,510 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-28 03:17:26,510 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-28 03:17:26,510 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-28 03:17:26,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:17:26,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-28 03:17:26,511 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:17:26,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:17:26,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:17:26,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:17:26,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:17:26,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:17:26,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:17:27,001 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:17:27,001 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-28 03:17:27,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:27 BoogieIcfgContainer [2020-11-28 03:17:27,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:17:27,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:17:27,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:17:27,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:17:27,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:17:25" (1/3) ... [2020-11-28 03:17:27,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70840a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:17:27, skipping insertion in model container [2020-11-28 03:17:27,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:26" (2/3) ... [2020-11-28 03:17:27,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70840a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:17:27, skipping insertion in model container [2020-11-28 03:17:27,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:27" (3/3) ... [2020-11-28 03:17:27,011 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-11-28 03:17:27,020 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:17:27,025 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:17:27,035 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:17:27,053 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:17:27,053 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:17:27,054 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:17:27,054 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:17:27,054 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:17:27,054 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:17:27,054 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:17:27,054 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:17:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-11-28 03:17:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:17:27,071 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:27,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:27,072 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:27,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:27,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1012612054, now seen corresponding path program 1 times [2020-11-28 03:17:27,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:27,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167851236] [2020-11-28 03:17:27,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:27,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:27,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167851236] [2020-11-28 03:17:27,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:27,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:17:27,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387909300] [2020-11-28 03:17:27,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:17:27,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:27,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:17:27,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:17:27,334 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2020-11-28 03:17:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:27,378 INFO L93 Difference]: Finished difference Result 49 states and 81 transitions. [2020-11-28 03:17:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:17:27,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-28 03:17:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:27,396 INFO L225 Difference]: With dead ends: 49 [2020-11-28 03:17:27,396 INFO L226 Difference]: Without dead ends: 44 [2020-11-28 03:17:27,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:17:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-28 03:17:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-28 03:17:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 03:17:27,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 76 transitions. [2020-11-28 03:17:27,441 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 76 transitions. Word has length 9 [2020-11-28 03:17:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:27,442 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 76 transitions. [2020-11-28 03:17:27,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:17:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 76 transitions. [2020-11-28 03:17:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:17:27,445 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:27,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:27,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:17:27,445 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:27,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:27,446 INFO L82 PathProgramCache]: Analyzing trace with hash -2067841466, now seen corresponding path program 1 times [2020-11-28 03:17:27,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:27,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867474794] [2020-11-28 03:17:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:27,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:27,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867474794] [2020-11-28 03:17:27,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:27,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:27,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620436086] [2020-11-28 03:17:27,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:27,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:27,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:27,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:27,671 INFO L87 Difference]: Start difference. First operand 44 states and 76 transitions. Second operand 4 states. [2020-11-28 03:17:27,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:27,974 INFO L93 Difference]: Finished difference Result 79 states and 142 transitions. [2020-11-28 03:17:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:27,975 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-28 03:17:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:27,977 INFO L225 Difference]: With dead ends: 79 [2020-11-28 03:17:27,977 INFO L226 Difference]: Without dead ends: 79 [2020-11-28 03:17:27,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-28 03:17:27,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2020-11-28 03:17:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-28 03:17:27,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 99 transitions. [2020-11-28 03:17:27,988 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 99 transitions. Word has length 23 [2020-11-28 03:17:27,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:27,988 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 99 transitions. [2020-11-28 03:17:27,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:27,988 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 99 transitions. [2020-11-28 03:17:27,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:17:27,989 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:27,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:27,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:17:27,990 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:27,991 INFO L82 PathProgramCache]: Analyzing trace with hash 947262152, now seen corresponding path program 1 times [2020-11-28 03:17:27,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:27,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133342840] [2020-11-28 03:17:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:28,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:28,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133342840] [2020-11-28 03:17:28,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:28,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:28,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104925492] [2020-11-28 03:17:28,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:28,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:28,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:28,135 INFO L87 Difference]: Start difference. First operand 56 states and 99 transitions. Second operand 4 states. [2020-11-28 03:17:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:28,377 INFO L93 Difference]: Finished difference Result 79 states and 140 transitions. [2020-11-28 03:17:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:28,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-28 03:17:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:28,380 INFO L225 Difference]: With dead ends: 79 [2020-11-28 03:17:28,380 INFO L226 Difference]: Without dead ends: 79 [2020-11-28 03:17:28,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-28 03:17:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-11-28 03:17:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-28 03:17:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 139 transitions. [2020-11-28 03:17:28,395 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 139 transitions. Word has length 23 [2020-11-28 03:17:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:28,396 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 139 transitions. [2020-11-28 03:17:28,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 139 transitions. [2020-11-28 03:17:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:17:28,397 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:28,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:28,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:17:28,398 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:28,398 INFO L82 PathProgramCache]: Analyzing trace with hash 328021414, now seen corresponding path program 1 times [2020-11-28 03:17:28,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:28,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748614541] [2020-11-28 03:17:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:28,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:28,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748614541] [2020-11-28 03:17:28,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:28,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:28,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48243984] [2020-11-28 03:17:28,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:28,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:28,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:28,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:28,493 INFO L87 Difference]: Start difference. First operand 78 states and 139 transitions. Second operand 4 states. [2020-11-28 03:17:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:28,704 INFO L93 Difference]: Finished difference Result 82 states and 142 transitions. [2020-11-28 03:17:28,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:28,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-28 03:17:28,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:28,706 INFO L225 Difference]: With dead ends: 82 [2020-11-28 03:17:28,706 INFO L226 Difference]: Without dead ends: 82 [2020-11-28 03:17:28,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-28 03:17:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-11-28 03:17:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-28 03:17:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 141 transitions. [2020-11-28 03:17:28,715 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 141 transitions. Word has length 24 [2020-11-28 03:17:28,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:28,715 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 141 transitions. [2020-11-28 03:17:28,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:28,715 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-11-28 03:17:28,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:17:28,716 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:28,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:28,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:17:28,717 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:28,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:28,717 INFO L82 PathProgramCache]: Analyzing trace with hash -693046940, now seen corresponding path program 1 times [2020-11-28 03:17:28,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:28,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377505986] [2020-11-28 03:17:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:28,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:28,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377505986] [2020-11-28 03:17:28,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:28,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:28,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258562367] [2020-11-28 03:17:28,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:28,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:28,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:28,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:28,820 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 4 states. [2020-11-28 03:17:29,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:29,033 INFO L93 Difference]: Finished difference Result 149 states and 263 transitions. [2020-11-28 03:17:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:29,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-28 03:17:29,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:29,035 INFO L225 Difference]: With dead ends: 149 [2020-11-28 03:17:29,035 INFO L226 Difference]: Without dead ends: 149 [2020-11-28 03:17:29,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-28 03:17:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-11-28 03:17:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-28 03:17:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 262 transitions. [2020-11-28 03:17:29,054 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 262 transitions. Word has length 24 [2020-11-28 03:17:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:29,054 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 262 transitions. [2020-11-28 03:17:29,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:29,054 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 262 transitions. [2020-11-28 03:17:29,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:17:29,056 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:29,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:29,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:17:29,056 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:29,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:29,057 INFO L82 PathProgramCache]: Analyzing trace with hash 586816738, now seen corresponding path program 1 times [2020-11-28 03:17:29,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:29,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781841569] [2020-11-28 03:17:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:29,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:29,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781841569] [2020-11-28 03:17:29,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:29,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:29,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535208825] [2020-11-28 03:17:29,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:29,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:29,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:29,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:29,160 INFO L87 Difference]: Start difference. First operand 148 states and 262 transitions. Second operand 4 states. [2020-11-28 03:17:29,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:29,382 INFO L93 Difference]: Finished difference Result 189 states and 337 transitions. [2020-11-28 03:17:29,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:29,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-28 03:17:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:29,385 INFO L225 Difference]: With dead ends: 189 [2020-11-28 03:17:29,385 INFO L226 Difference]: Without dead ends: 189 [2020-11-28 03:17:29,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:29,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-28 03:17:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2020-11-28 03:17:29,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-28 03:17:29,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 260 transitions. [2020-11-28 03:17:29,409 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 260 transitions. Word has length 24 [2020-11-28 03:17:29,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:29,410 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 260 transitions. [2020-11-28 03:17:29,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:29,411 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 260 transitions. [2020-11-28 03:17:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:17:29,413 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:29,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:29,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 03:17:29,413 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:29,414 INFO L82 PathProgramCache]: Analyzing trace with hash -3010669, now seen corresponding path program 1 times [2020-11-28 03:17:29,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:29,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194244833] [2020-11-28 03:17:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:29,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:29,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194244833] [2020-11-28 03:17:29,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:29,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:29,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055233225] [2020-11-28 03:17:29,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:29,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:29,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:29,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:29,503 INFO L87 Difference]: Start difference. First operand 148 states and 260 transitions. Second operand 4 states. [2020-11-28 03:17:29,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:29,719 INFO L93 Difference]: Finished difference Result 273 states and 487 transitions. [2020-11-28 03:17:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:29,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-28 03:17:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:29,721 INFO L225 Difference]: With dead ends: 273 [2020-11-28 03:17:29,722 INFO L226 Difference]: Without dead ends: 273 [2020-11-28 03:17:29,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-11-28 03:17:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 200. [2020-11-28 03:17:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-11-28 03:17:29,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 350 transitions. [2020-11-28 03:17:29,742 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 350 transitions. Word has length 25 [2020-11-28 03:17:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:29,743 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 350 transitions. [2020-11-28 03:17:29,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 350 transitions. [2020-11-28 03:17:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:17:29,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:29,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:29,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 03:17:29,749 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1282874347, now seen corresponding path program 1 times [2020-11-28 03:17:29,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:29,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241594548] [2020-11-28 03:17:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:29,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:29,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241594548] [2020-11-28 03:17:29,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:29,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:29,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684447952] [2020-11-28 03:17:29,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:29,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:29,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:29,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:29,827 INFO L87 Difference]: Start difference. First operand 200 states and 350 transitions. Second operand 4 states. [2020-11-28 03:17:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:30,021 INFO L93 Difference]: Finished difference Result 281 states and 489 transitions. [2020-11-28 03:17:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:30,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-28 03:17:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:30,023 INFO L225 Difference]: With dead ends: 281 [2020-11-28 03:17:30,023 INFO L226 Difference]: Without dead ends: 281 [2020-11-28 03:17:30,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-11-28 03:17:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2020-11-28 03:17:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-11-28 03:17:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 488 transitions. [2020-11-28 03:17:30,034 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 488 transitions. Word has length 25 [2020-11-28 03:17:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:30,034 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 488 transitions. [2020-11-28 03:17:30,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 488 transitions. [2020-11-28 03:17:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:17:30,036 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:30,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:30,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 03:17:30,049 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:30,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:30,050 INFO L82 PathProgramCache]: Analyzing trace with hash -86712177, now seen corresponding path program 1 times [2020-11-28 03:17:30,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:30,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221979141] [2020-11-28 03:17:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:30,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:30,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221979141] [2020-11-28 03:17:30,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:30,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:30,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114147463] [2020-11-28 03:17:30,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:30,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:30,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:30,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:30,120 INFO L87 Difference]: Start difference. First operand 280 states and 488 transitions. Second operand 4 states. [2020-11-28 03:17:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:30,323 INFO L93 Difference]: Finished difference Result 287 states and 493 transitions. [2020-11-28 03:17:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:30,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-28 03:17:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:30,325 INFO L225 Difference]: With dead ends: 287 [2020-11-28 03:17:30,325 INFO L226 Difference]: Without dead ends: 287 [2020-11-28 03:17:30,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-28 03:17:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2020-11-28 03:17:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-11-28 03:17:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 492 transitions. [2020-11-28 03:17:30,335 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 492 transitions. Word has length 26 [2020-11-28 03:17:30,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:30,335 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 492 transitions. [2020-11-28 03:17:30,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 492 transitions. [2020-11-28 03:17:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:17:30,337 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:30,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:30,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 03:17:30,337 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:30,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1107780531, now seen corresponding path program 1 times [2020-11-28 03:17:30,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:30,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420412997] [2020-11-28 03:17:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:30,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:30,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420412997] [2020-11-28 03:17:30,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:30,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:30,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745341305] [2020-11-28 03:17:30,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:30,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:30,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:30,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:30,392 INFO L87 Difference]: Start difference. First operand 286 states and 492 transitions. Second operand 4 states. [2020-11-28 03:17:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:30,571 INFO L93 Difference]: Finished difference Result 523 states and 909 transitions. [2020-11-28 03:17:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:30,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-28 03:17:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:30,575 INFO L225 Difference]: With dead ends: 523 [2020-11-28 03:17:30,575 INFO L226 Difference]: Without dead ends: 523 [2020-11-28 03:17:30,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-11-28 03:17:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 394. [2020-11-28 03:17:30,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-11-28 03:17:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 668 transitions. [2020-11-28 03:17:30,586 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 668 transitions. Word has length 26 [2020-11-28 03:17:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:30,587 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 668 transitions. [2020-11-28 03:17:30,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 668 transitions. [2020-11-28 03:17:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:17:30,588 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:30,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:30,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 03:17:30,589 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:30,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1907323087, now seen corresponding path program 1 times [2020-11-28 03:17:30,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:30,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029402449] [2020-11-28 03:17:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:30,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:30,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029402449] [2020-11-28 03:17:30,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:30,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:30,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856533660] [2020-11-28 03:17:30,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:30,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:30,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:30,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:30,675 INFO L87 Difference]: Start difference. First operand 394 states and 668 transitions. Second operand 4 states. [2020-11-28 03:17:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:30,848 INFO L93 Difference]: Finished difference Result 547 states and 921 transitions. [2020-11-28 03:17:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:30,849 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-28 03:17:30,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:30,852 INFO L225 Difference]: With dead ends: 547 [2020-11-28 03:17:30,852 INFO L226 Difference]: Without dead ends: 547 [2020-11-28 03:17:30,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-11-28 03:17:30,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 546. [2020-11-28 03:17:30,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-11-28 03:17:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 920 transitions. [2020-11-28 03:17:30,869 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 920 transitions. Word has length 26 [2020-11-28 03:17:30,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:30,869 INFO L481 AbstractCegarLoop]: Abstraction has 546 states and 920 transitions. [2020-11-28 03:17:30,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 920 transitions. [2020-11-28 03:17:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:17:30,875 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:30,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:30,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 03:17:30,876 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:30,877 INFO L82 PathProgramCache]: Analyzing trace with hash 25171040, now seen corresponding path program 1 times [2020-11-28 03:17:30,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:30,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606476969] [2020-11-28 03:17:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:30,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:30,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606476969] [2020-11-28 03:17:30,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:30,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:30,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138648406] [2020-11-28 03:17:30,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:30,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:30,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:30,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:30,957 INFO L87 Difference]: Start difference. First operand 546 states and 920 transitions. Second operand 4 states. [2020-11-28 03:17:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:31,144 INFO L93 Difference]: Finished difference Result 555 states and 921 transitions. [2020-11-28 03:17:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:31,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-28 03:17:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:31,148 INFO L225 Difference]: With dead ends: 555 [2020-11-28 03:17:31,148 INFO L226 Difference]: Without dead ends: 555 [2020-11-28 03:17:31,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:31,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-11-28 03:17:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 554. [2020-11-28 03:17:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-11-28 03:17:31,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 920 transitions. [2020-11-28 03:17:31,164 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 920 transitions. Word has length 27 [2020-11-28 03:17:31,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:31,164 INFO L481 AbstractCegarLoop]: Abstraction has 554 states and 920 transitions. [2020-11-28 03:17:31,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:31,165 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 920 transitions. [2020-11-28 03:17:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:17:31,166 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:31,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:31,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 03:17:31,166 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:31,167 INFO L82 PathProgramCache]: Analyzing trace with hash -995897314, now seen corresponding path program 1 times [2020-11-28 03:17:31,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:31,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621374795] [2020-11-28 03:17:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:31,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:31,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621374795] [2020-11-28 03:17:31,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:31,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:31,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29038568] [2020-11-28 03:17:31,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:31,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:31,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:31,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:31,236 INFO L87 Difference]: Start difference. First operand 554 states and 920 transitions. Second operand 4 states. [2020-11-28 03:17:31,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:31,410 INFO L93 Difference]: Finished difference Result 1003 states and 1681 transitions. [2020-11-28 03:17:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:31,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-28 03:17:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:31,417 INFO L225 Difference]: With dead ends: 1003 [2020-11-28 03:17:31,417 INFO L226 Difference]: Without dead ends: 1003 [2020-11-28 03:17:31,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2020-11-28 03:17:31,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 778. [2020-11-28 03:17:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-11-28 03:17:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1264 transitions. [2020-11-28 03:17:31,441 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1264 transitions. Word has length 27 [2020-11-28 03:17:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:31,441 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1264 transitions. [2020-11-28 03:17:31,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1264 transitions. [2020-11-28 03:17:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:17:31,443 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:31,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:31,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 03:17:31,444 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:31,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2019206304, now seen corresponding path program 1 times [2020-11-28 03:17:31,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:31,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182870290] [2020-11-28 03:17:31,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:31,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:31,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182870290] [2020-11-28 03:17:31,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:31,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:31,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540485859] [2020-11-28 03:17:31,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:31,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:31,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:31,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:31,535 INFO L87 Difference]: Start difference. First operand 778 states and 1264 transitions. Second operand 4 states. [2020-11-28 03:17:31,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:31,753 INFO L93 Difference]: Finished difference Result 1067 states and 1721 transitions. [2020-11-28 03:17:31,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:31,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-28 03:17:31,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:31,760 INFO L225 Difference]: With dead ends: 1067 [2020-11-28 03:17:31,760 INFO L226 Difference]: Without dead ends: 1067 [2020-11-28 03:17:31,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2020-11-28 03:17:31,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1066. [2020-11-28 03:17:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-11-28 03:17:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1720 transitions. [2020-11-28 03:17:31,791 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1720 transitions. Word has length 27 [2020-11-28 03:17:31,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:31,791 INFO L481 AbstractCegarLoop]: Abstraction has 1066 states and 1720 transitions. [2020-11-28 03:17:31,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1720 transitions. [2020-11-28 03:17:31,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:17:31,793 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:31,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:31,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 03:17:31,794 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:31,794 INFO L82 PathProgramCache]: Analyzing trace with hash -801405958, now seen corresponding path program 1 times [2020-11-28 03:17:31,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:31,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701481599] [2020-11-28 03:17:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:31,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:31,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701481599] [2020-11-28 03:17:31,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:31,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:31,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169687661] [2020-11-28 03:17:31,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:31,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:31,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:31,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:31,872 INFO L87 Difference]: Start difference. First operand 1066 states and 1720 transitions. Second operand 4 states. [2020-11-28 03:17:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:32,069 INFO L93 Difference]: Finished difference Result 1083 states and 1721 transitions. [2020-11-28 03:17:32,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:32,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-28 03:17:32,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:32,076 INFO L225 Difference]: With dead ends: 1083 [2020-11-28 03:17:32,076 INFO L226 Difference]: Without dead ends: 1083 [2020-11-28 03:17:32,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2020-11-28 03:17:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1082. [2020-11-28 03:17:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1082 states. [2020-11-28 03:17:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1720 transitions. [2020-11-28 03:17:32,109 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1720 transitions. Word has length 28 [2020-11-28 03:17:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:32,110 INFO L481 AbstractCegarLoop]: Abstraction has 1082 states and 1720 transitions. [2020-11-28 03:17:32,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1720 transitions. [2020-11-28 03:17:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:17:32,112 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:32,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:32,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-28 03:17:32,113 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1822474312, now seen corresponding path program 1 times [2020-11-28 03:17:32,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:32,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608036477] [2020-11-28 03:17:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:32,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:32,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608036477] [2020-11-28 03:17:32,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:32,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:32,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232236138] [2020-11-28 03:17:32,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:32,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:32,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:32,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:32,195 INFO L87 Difference]: Start difference. First operand 1082 states and 1720 transitions. Second operand 4 states. [2020-11-28 03:17:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:32,405 INFO L93 Difference]: Finished difference Result 1931 states and 3097 transitions. [2020-11-28 03:17:32,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:32,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-28 03:17:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:32,415 INFO L225 Difference]: With dead ends: 1931 [2020-11-28 03:17:32,416 INFO L226 Difference]: Without dead ends: 1931 [2020-11-28 03:17:32,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2020-11-28 03:17:32,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1546. [2020-11-28 03:17:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-11-28 03:17:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2392 transitions. [2020-11-28 03:17:32,470 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2392 transitions. Word has length 28 [2020-11-28 03:17:32,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:32,470 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 2392 transitions. [2020-11-28 03:17:32,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:32,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2392 transitions. [2020-11-28 03:17:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:17:32,473 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:32,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:32,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-28 03:17:32,473 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:32,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1192629306, now seen corresponding path program 1 times [2020-11-28 03:17:32,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:32,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643054243] [2020-11-28 03:17:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:32,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:32,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643054243] [2020-11-28 03:17:32,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:32,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:32,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978220653] [2020-11-28 03:17:32,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:32,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:32,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:32,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:32,544 INFO L87 Difference]: Start difference. First operand 1546 states and 2392 transitions. Second operand 4 states. [2020-11-28 03:17:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:32,743 INFO L93 Difference]: Finished difference Result 2091 states and 3209 transitions. [2020-11-28 03:17:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:32,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-28 03:17:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:32,754 INFO L225 Difference]: With dead ends: 2091 [2020-11-28 03:17:32,754 INFO L226 Difference]: Without dead ends: 2091 [2020-11-28 03:17:32,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:32,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2020-11-28 03:17:32,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 2090. [2020-11-28 03:17:32,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2090 states. [2020-11-28 03:17:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3208 transitions. [2020-11-28 03:17:32,805 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3208 transitions. Word has length 28 [2020-11-28 03:17:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:32,805 INFO L481 AbstractCegarLoop]: Abstraction has 2090 states and 3208 transitions. [2020-11-28 03:17:32,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3208 transitions. [2020-11-28 03:17:32,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 03:17:32,808 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:32,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:32,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-28 03:17:32,809 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:32,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:32,809 INFO L82 PathProgramCache]: Analyzing trace with hash -655478549, now seen corresponding path program 1 times [2020-11-28 03:17:32,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:32,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159877598] [2020-11-28 03:17:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:32,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:32,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159877598] [2020-11-28 03:17:32,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:32,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:32,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881101830] [2020-11-28 03:17:32,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:32,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:32,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:32,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:32,867 INFO L87 Difference]: Start difference. First operand 2090 states and 3208 transitions. Second operand 4 states. [2020-11-28 03:17:33,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:33,041 INFO L93 Difference]: Finished difference Result 2123 states and 3209 transitions. [2020-11-28 03:17:33,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:33,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-28 03:17:33,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:33,053 INFO L225 Difference]: With dead ends: 2123 [2020-11-28 03:17:33,053 INFO L226 Difference]: Without dead ends: 2123 [2020-11-28 03:17:33,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:33,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2020-11-28 03:17:33,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2122. [2020-11-28 03:17:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2122 states. [2020-11-28 03:17:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 3208 transitions. [2020-11-28 03:17:33,104 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 3208 transitions. Word has length 29 [2020-11-28 03:17:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:33,105 INFO L481 AbstractCegarLoop]: Abstraction has 2122 states and 3208 transitions. [2020-11-28 03:17:33,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 3208 transitions. [2020-11-28 03:17:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 03:17:33,108 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:33,108 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:33,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-28 03:17:33,108 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:33,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1676546903, now seen corresponding path program 1 times [2020-11-28 03:17:33,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:33,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422254285] [2020-11-28 03:17:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:33,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:33,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422254285] [2020-11-28 03:17:33,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:33,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:33,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113787113] [2020-11-28 03:17:33,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:33,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:33,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:33,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:33,174 INFO L87 Difference]: Start difference. First operand 2122 states and 3208 transitions. Second operand 4 states. [2020-11-28 03:17:33,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:33,398 INFO L93 Difference]: Finished difference Result 3723 states and 5673 transitions. [2020-11-28 03:17:33,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:33,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-28 03:17:33,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:33,417 INFO L225 Difference]: With dead ends: 3723 [2020-11-28 03:17:33,417 INFO L226 Difference]: Without dead ends: 3723 [2020-11-28 03:17:33,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2020-11-28 03:17:33,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3082. [2020-11-28 03:17:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3082 states. [2020-11-28 03:17:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4520 transitions. [2020-11-28 03:17:33,505 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4520 transitions. Word has length 29 [2020-11-28 03:17:33,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:33,505 INFO L481 AbstractCegarLoop]: Abstraction has 3082 states and 4520 transitions. [2020-11-28 03:17:33,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:33,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4520 transitions. [2020-11-28 03:17:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 03:17:33,510 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:33,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:33,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-28 03:17:33,510 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:33,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:33,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1338556715, now seen corresponding path program 1 times [2020-11-28 03:17:33,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:33,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205892581] [2020-11-28 03:17:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:33,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:33,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205892581] [2020-11-28 03:17:33,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:33,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:33,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210568058] [2020-11-28 03:17:33,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:33,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:33,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:33,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:33,579 INFO L87 Difference]: Start difference. First operand 3082 states and 4520 transitions. Second operand 4 states. [2020-11-28 03:17:33,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:33,800 INFO L93 Difference]: Finished difference Result 4107 states and 5961 transitions. [2020-11-28 03:17:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:33,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-28 03:17:33,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:33,820 INFO L225 Difference]: With dead ends: 4107 [2020-11-28 03:17:33,820 INFO L226 Difference]: Without dead ends: 4107 [2020-11-28 03:17:33,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2020-11-28 03:17:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4106. [2020-11-28 03:17:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4106 states. [2020-11-28 03:17:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 5960 transitions. [2020-11-28 03:17:33,919 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 5960 transitions. Word has length 29 [2020-11-28 03:17:33,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:33,919 INFO L481 AbstractCegarLoop]: Abstraction has 4106 states and 5960 transitions. [2020-11-28 03:17:33,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:33,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 5960 transitions. [2020-11-28 03:17:33,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:17:33,924 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:33,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:33,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-28 03:17:33,925 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:33,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:33,926 INFO L82 PathProgramCache]: Analyzing trace with hash -426685595, now seen corresponding path program 1 times [2020-11-28 03:17:33,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:33,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291680668] [2020-11-28 03:17:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:33,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:33,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291680668] [2020-11-28 03:17:33,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:33,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:33,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816503235] [2020-11-28 03:17:33,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:33,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:33,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:33,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:33,977 INFO L87 Difference]: Start difference. First operand 4106 states and 5960 transitions. Second operand 4 states. [2020-11-28 03:17:34,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:34,148 INFO L93 Difference]: Finished difference Result 4171 states and 5961 transitions. [2020-11-28 03:17:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:34,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-28 03:17:34,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:34,171 INFO L225 Difference]: With dead ends: 4171 [2020-11-28 03:17:34,171 INFO L226 Difference]: Without dead ends: 4171 [2020-11-28 03:17:34,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:34,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2020-11-28 03:17:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4170. [2020-11-28 03:17:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4170 states. [2020-11-28 03:17:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4170 states to 4170 states and 5960 transitions. [2020-11-28 03:17:34,300 INFO L78 Accepts]: Start accepts. Automaton has 4170 states and 5960 transitions. Word has length 30 [2020-11-28 03:17:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:34,301 INFO L481 AbstractCegarLoop]: Abstraction has 4170 states and 5960 transitions. [2020-11-28 03:17:34,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4170 states and 5960 transitions. [2020-11-28 03:17:34,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:17:34,306 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:34,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:34,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-28 03:17:34,307 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:34,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1447753949, now seen corresponding path program 1 times [2020-11-28 03:17:34,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:34,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025426836] [2020-11-28 03:17:34,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:34,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:34,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025426836] [2020-11-28 03:17:34,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:34,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:34,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94334458] [2020-11-28 03:17:34,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:34,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:34,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:34,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:34,361 INFO L87 Difference]: Start difference. First operand 4170 states and 5960 transitions. Second operand 4 states. [2020-11-28 03:17:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:34,514 INFO L93 Difference]: Finished difference Result 7179 states and 10313 transitions. [2020-11-28 03:17:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:34,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-28 03:17:34,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:34,530 INFO L225 Difference]: With dead ends: 7179 [2020-11-28 03:17:34,530 INFO L226 Difference]: Without dead ends: 7179 [2020-11-28 03:17:34,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2020-11-28 03:17:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 6154. [2020-11-28 03:17:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6154 states. [2020-11-28 03:17:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 8520 transitions. [2020-11-28 03:17:34,662 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 8520 transitions. Word has length 30 [2020-11-28 03:17:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:34,662 INFO L481 AbstractCegarLoop]: Abstraction has 6154 states and 8520 transitions. [2020-11-28 03:17:34,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 8520 transitions. [2020-11-28 03:17:34,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:17:34,670 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:34,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:34,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-28 03:17:34,671 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1567349669, now seen corresponding path program 1 times [2020-11-28 03:17:34,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:34,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419355425] [2020-11-28 03:17:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:34,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:34,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419355425] [2020-11-28 03:17:34,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:34,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:34,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983719003] [2020-11-28 03:17:34,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:34,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:34,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:34,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:34,733 INFO L87 Difference]: Start difference. First operand 6154 states and 8520 transitions. Second operand 4 states. [2020-11-28 03:17:34,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:34,917 INFO L93 Difference]: Finished difference Result 8075 states and 11017 transitions. [2020-11-28 03:17:34,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:34,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-28 03:17:34,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:34,932 INFO L225 Difference]: With dead ends: 8075 [2020-11-28 03:17:34,932 INFO L226 Difference]: Without dead ends: 8075 [2020-11-28 03:17:34,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8075 states. [2020-11-28 03:17:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8075 to 8074. [2020-11-28 03:17:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8074 states. [2020-11-28 03:17:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8074 states to 8074 states and 11016 transitions. [2020-11-28 03:17:35,117 INFO L78 Accepts]: Start accepts. Automaton has 8074 states and 11016 transitions. Word has length 30 [2020-11-28 03:17:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:35,118 INFO L481 AbstractCegarLoop]: Abstraction has 8074 states and 11016 transitions. [2020-11-28 03:17:35,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 8074 states and 11016 transitions. [2020-11-28 03:17:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:17:35,138 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:35,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:35,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-28 03:17:35,139 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:35,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1924028042, now seen corresponding path program 1 times [2020-11-28 03:17:35,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:35,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025319867] [2020-11-28 03:17:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:35,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:35,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025319867] [2020-11-28 03:17:35,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:35,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:35,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386038355] [2020-11-28 03:17:35,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:35,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:35,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:35,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:35,231 INFO L87 Difference]: Start difference. First operand 8074 states and 11016 transitions. Second operand 4 states. [2020-11-28 03:17:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:35,442 INFO L93 Difference]: Finished difference Result 8203 states and 11017 transitions. [2020-11-28 03:17:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:35,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-28 03:17:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:35,457 INFO L225 Difference]: With dead ends: 8203 [2020-11-28 03:17:35,457 INFO L226 Difference]: Without dead ends: 8203 [2020-11-28 03:17:35,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2020-11-28 03:17:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8202. [2020-11-28 03:17:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8202 states. [2020-11-28 03:17:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8202 states to 8202 states and 11016 transitions. [2020-11-28 03:17:35,632 INFO L78 Accepts]: Start accepts. Automaton has 8202 states and 11016 transitions. Word has length 31 [2020-11-28 03:17:35,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:35,633 INFO L481 AbstractCegarLoop]: Abstraction has 8202 states and 11016 transitions. [2020-11-28 03:17:35,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 8202 states and 11016 transitions. [2020-11-28 03:17:35,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:17:35,641 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:35,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:35,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-28 03:17:35,642 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:35,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:35,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1349870900, now seen corresponding path program 1 times [2020-11-28 03:17:35,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:35,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169128442] [2020-11-28 03:17:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:35,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:35,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169128442] [2020-11-28 03:17:35,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:35,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:35,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253156671] [2020-11-28 03:17:35,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:35,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:35,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:35,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:35,694 INFO L87 Difference]: Start difference. First operand 8202 states and 11016 transitions. Second operand 4 states. [2020-11-28 03:17:35,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:35,868 INFO L93 Difference]: Finished difference Result 13835 states and 18569 transitions. [2020-11-28 03:17:35,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:35,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-28 03:17:35,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:35,893 INFO L225 Difference]: With dead ends: 13835 [2020-11-28 03:17:35,893 INFO L226 Difference]: Without dead ends: 13835 [2020-11-28 03:17:35,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:35,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2020-11-28 03:17:36,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 12298. [2020-11-28 03:17:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12298 states. [2020-11-28 03:17:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12298 states to 12298 states and 16008 transitions. [2020-11-28 03:17:36,183 INFO L78 Accepts]: Start accepts. Automaton has 12298 states and 16008 transitions. Word has length 31 [2020-11-28 03:17:36,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:36,183 INFO L481 AbstractCegarLoop]: Abstraction has 12298 states and 16008 transitions. [2020-11-28 03:17:36,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:36,183 INFO L276 IsEmpty]: Start isEmpty. Operand 12298 states and 16008 transitions. [2020-11-28 03:17:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:17:36,203 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:36,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:36,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-28 03:17:36,204 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:36,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:36,204 INFO L82 PathProgramCache]: Analyzing trace with hash 70007222, now seen corresponding path program 1 times [2020-11-28 03:17:36,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:36,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193215762] [2020-11-28 03:17:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:36,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:36,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193215762] [2020-11-28 03:17:36,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:36,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:36,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780675511] [2020-11-28 03:17:36,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:36,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:36,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:36,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:36,262 INFO L87 Difference]: Start difference. First operand 12298 states and 16008 transitions. Second operand 4 states. [2020-11-28 03:17:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:36,478 INFO L93 Difference]: Finished difference Result 15883 states and 20233 transitions. [2020-11-28 03:17:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:36,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-28 03:17:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:36,580 INFO L225 Difference]: With dead ends: 15883 [2020-11-28 03:17:36,581 INFO L226 Difference]: Without dead ends: 15883 [2020-11-28 03:17:36,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2020-11-28 03:17:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 15882. [2020-11-28 03:17:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15882 states. [2020-11-28 03:17:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15882 states to 15882 states and 20232 transitions. [2020-11-28 03:17:36,785 INFO L78 Accepts]: Start accepts. Automaton has 15882 states and 20232 transitions. Word has length 31 [2020-11-28 03:17:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:36,785 INFO L481 AbstractCegarLoop]: Abstraction has 15882 states and 20232 transitions. [2020-11-28 03:17:36,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:36,786 INFO L276 IsEmpty]: Start isEmpty. Operand 15882 states and 20232 transitions. [2020-11-28 03:17:36,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 03:17:36,801 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:36,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:36,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-28 03:17:36,801 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:36,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:36,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1096993072, now seen corresponding path program 1 times [2020-11-28 03:17:36,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:36,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788550347] [2020-11-28 03:17:36,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:36,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:36,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788550347] [2020-11-28 03:17:36,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:36,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:36,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998818808] [2020-11-28 03:17:36,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:36,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:36,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:36,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:36,922 INFO L87 Difference]: Start difference. First operand 15882 states and 20232 transitions. Second operand 4 states. [2020-11-28 03:17:37,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:37,115 INFO L93 Difference]: Finished difference Result 16139 states and 20233 transitions. [2020-11-28 03:17:37,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:37,116 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-28 03:17:37,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:37,140 INFO L225 Difference]: With dead ends: 16139 [2020-11-28 03:17:37,140 INFO L226 Difference]: Without dead ends: 16139 [2020-11-28 03:17:37,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2020-11-28 03:17:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 16138. [2020-11-28 03:17:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16138 states. [2020-11-28 03:17:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 20232 transitions. [2020-11-28 03:17:37,405 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 20232 transitions. Word has length 32 [2020-11-28 03:17:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:37,405 INFO L481 AbstractCegarLoop]: Abstraction has 16138 states and 20232 transitions. [2020-11-28 03:17:37,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 20232 transitions. [2020-11-28 03:17:37,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 03:17:37,421 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:37,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:37,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-28 03:17:37,421 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:37,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:37,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2118061426, now seen corresponding path program 1 times [2020-11-28 03:17:37,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:37,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42755855] [2020-11-28 03:17:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:37,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:37,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42755855] [2020-11-28 03:17:37,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:37,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:37,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175176430] [2020-11-28 03:17:37,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:37,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:37,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:37,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:37,470 INFO L87 Difference]: Start difference. First operand 16138 states and 20232 transitions. Second operand 4 states. [2020-11-28 03:17:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:37,780 INFO L93 Difference]: Finished difference Result 31243 states and 37385 transitions. [2020-11-28 03:17:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:37,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-28 03:17:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:37,812 INFO L225 Difference]: With dead ends: 31243 [2020-11-28 03:17:37,812 INFO L226 Difference]: Without dead ends: 31243 [2020-11-28 03:17:37,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:37,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31243 states. [2020-11-28 03:17:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31243 to 31242. [2020-11-28 03:17:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31242 states. [2020-11-28 03:17:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 37384 transitions. [2020-11-28 03:17:38,320 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 37384 transitions. Word has length 32 [2020-11-28 03:17:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:38,320 INFO L481 AbstractCegarLoop]: Abstraction has 31242 states and 37384 transitions. [2020-11-28 03:17:38,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 37384 transitions. [2020-11-28 03:17:38,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 03:17:38,359 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:38,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:38,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-28 03:17:38,360 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:38,361 INFO L82 PathProgramCache]: Analyzing trace with hash -838197748, now seen corresponding path program 1 times [2020-11-28 03:17:38,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:38,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482625389] [2020-11-28 03:17:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:38,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:38,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482625389] [2020-11-28 03:17:38,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:38,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:38,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330464230] [2020-11-28 03:17:38,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:38,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:38,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:38,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:38,422 INFO L87 Difference]: Start difference. First operand 31242 states and 37384 transitions. Second operand 4 states. [2020-11-28 03:17:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:38,781 INFO L93 Difference]: Finished difference Result 33291 states and 39945 transitions. [2020-11-28 03:17:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:38,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-28 03:17:38,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:38,835 INFO L225 Difference]: With dead ends: 33291 [2020-11-28 03:17:38,835 INFO L226 Difference]: Without dead ends: 33291 [2020-11-28 03:17:38,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33291 states. [2020-11-28 03:17:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33291 to 31242. [2020-11-28 03:17:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31242 states. [2020-11-28 03:17:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 36872 transitions. [2020-11-28 03:17:39,259 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 36872 transitions. Word has length 32 [2020-11-28 03:17:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:39,260 INFO L481 AbstractCegarLoop]: Abstraction has 31242 states and 36872 transitions. [2020-11-28 03:17:39,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 36872 transitions. [2020-11-28 03:17:39,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 03:17:39,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:39,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:39,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-28 03:17:39,282 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:39,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:39,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1228702207, now seen corresponding path program 1 times [2020-11-28 03:17:39,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:39,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711808805] [2020-11-28 03:17:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:39,432 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-11-28 03:17:39,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:39,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711808805] [2020-11-28 03:17:39,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:39,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:39,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311364158] [2020-11-28 03:17:39,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:39,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:39,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:39,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:39,440 INFO L87 Difference]: Start difference. First operand 31242 states and 36872 transitions. Second operand 4 states. [2020-11-28 03:17:39,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:39,741 INFO L93 Difference]: Finished difference Result 50698 states and 58376 transitions. [2020-11-28 03:17:39,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:39,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-11-28 03:17:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:39,810 INFO L225 Difference]: With dead ends: 50698 [2020-11-28 03:17:39,810 INFO L226 Difference]: Without dead ends: 50698 [2020-11-28 03:17:39,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:39,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50698 states. [2020-11-28 03:17:40,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50698 to 48650. [2020-11-28 03:17:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48650 states. [2020-11-28 03:17:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48650 states to 48650 states and 56328 transitions. [2020-11-28 03:17:40,474 INFO L78 Accepts]: Start accepts. Automaton has 48650 states and 56328 transitions. Word has length 33 [2020-11-28 03:17:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:40,474 INFO L481 AbstractCegarLoop]: Abstraction has 48650 states and 56328 transitions. [2020-11-28 03:17:40,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 48650 states and 56328 transitions. [2020-11-28 03:17:40,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 03:17:40,654 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:40,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:40,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-28 03:17:40,654 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:17:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:40,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1786401411, now seen corresponding path program 1 times [2020-11-28 03:17:40,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:40,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796845727] [2020-11-28 03:17:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:40,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:17:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:40,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796845727] [2020-11-28 03:17:40,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:40,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:40,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458668111] [2020-11-28 03:17:40,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:40,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:40,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:40,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:40,763 INFO L87 Difference]: Start difference. First operand 48650 states and 56328 transitions. Second operand 4 states. [2020-11-28 03:17:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:41,223 INFO L93 Difference]: Finished difference Result 60935 states and 67590 transitions. [2020-11-28 03:17:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:41,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-11-28 03:17:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:41,224 INFO L225 Difference]: With dead ends: 60935 [2020-11-28 03:17:41,224 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:17:41,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:41,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:17:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:17:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:17:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:17:41,225 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-11-28 03:17:41,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:41,226 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:17:41,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:41,226 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:17:41,226 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:17:41,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-28 03:17:41,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:17:41 BoogieIcfgContainer [2020-11-28 03:17:41,232 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:17:41,233 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:17:41,233 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:17:41,233 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:17:41,234 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:27" (3/4) ... [2020-11-28 03:17:41,236 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:17:41,241 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-11-28 03:17:41,241 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-28 03:17:41,241 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-28 03:17:41,248 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-28 03:17:41,248 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:17:41,248 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 03:17:41,249 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:17:41,298 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_06c20dce-3f3d-4e70-8f4a-ff22d2ddb0dc/bin/uautomizer/witness.graphml [2020-11-28 03:17:41,298 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:17:41,299 INFO L168 Benchmark]: Toolchain (without parser) took 15326.51 ms. Allocated memory was 88.1 MB in the beginning and 4.5 GB in the end (delta: 4.4 GB). Free memory was 58.1 MB in the beginning and 4.0 GB in the end (delta: -4.0 GB). Peak memory consumption was 455.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:41,300 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 88.1 MB. Free memory is still 45.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:17:41,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 398.44 ms. Allocated memory is still 88.1 MB. Free memory was 58.0 MB in the beginning and 65.9 MB in the end (delta: -7.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:41,301 INFO L168 Benchmark]: Boogie Preprocessor took 63.06 ms. Allocated memory is still 88.1 MB. Free memory was 65.5 MB in the beginning and 63.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:41,301 INFO L168 Benchmark]: RCFGBuilder took 564.81 ms. Allocated memory is still 88.1 MB. Free memory was 63.8 MB in the beginning and 42.4 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:41,301 INFO L168 Benchmark]: TraceAbstraction took 14228.11 ms. Allocated memory was 88.1 MB in the beginning and 4.5 GB in the end (delta: 4.4 GB). Free memory was 42.0 MB in the beginning and 4.0 GB in the end (delta: -4.0 GB). Peak memory consumption was 435.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:41,302 INFO L168 Benchmark]: Witness Printer took 65.30 ms. Allocated memory is still 4.5 GB. Free memory was 4.0 GB in the beginning and 4.0 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:41,304 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 88.1 MB. Free memory is still 45.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 398.44 ms. Allocated memory is still 88.1 MB. Free memory was 58.0 MB in the beginning and 65.9 MB in the end (delta: -7.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.06 ms. Allocated memory is still 88.1 MB. Free memory was 65.5 MB in the beginning and 63.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 564.81 ms. Allocated memory is still 88.1 MB. Free memory was 63.8 MB in the beginning and 42.4 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14228.11 ms. Allocated memory was 88.1 MB in the beginning and 4.5 GB in the end (delta: 4.4 GB). Free memory was 42.0 MB in the beginning and 4.0 GB in the end (delta: -4.0 GB). Peak memory consumption was 435.4 MB. Max. memory is 16.1 GB. * Witness Printer took 65.30 ms. Allocated memory is still 4.5 GB. Free memory was 4.0 GB in the beginning and 4.0 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 53 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.1s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2900 SDtfs, 4219 SDslu, 232 SDs, 0 SdLazy, 2029 SolverSat, 110 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 214 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48650occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.5s AutomataMinimizationTime, 31 MinimizatonAttempts, 8194 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 852 NumberOfCodeBlocks, 852 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 821 ConstructedInterpolants, 0 QuantifiedInterpolants, 67886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...