./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/locks/test_locks_12.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fbb7e06bf350f46f725ea0ddc5d1215829061b3a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 03:55:15,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 03:55:15,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 03:55:15,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 03:55:15,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 03:55:15,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 03:55:15,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 03:55:15,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 03:55:15,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 03:55:15,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 03:55:15,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 03:55:15,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 03:55:15,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 03:55:15,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 03:55:15,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 03:55:15,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 03:55:15,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 03:55:15,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 03:55:15,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 03:55:15,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 03:55:15,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 03:55:15,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 03:55:15,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 03:55:15,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 03:55:15,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 03:55:15,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 03:55:15,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 03:55:15,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 03:55:15,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 03:55:15,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 03:55:15,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 03:55:15,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 03:55:15,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 03:55:15,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 03:55:15,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 03:55:15,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 03:55:15,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 03:55:15,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 03:55:15,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 03:55:15,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 03:55:15,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 03:55:15,775 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-26 03:55:15,804 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 03:55:15,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 03:55:15,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 03:55:15,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 03:55:15,823 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 03:55:15,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 03:55:15,824 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 03:55:15,824 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 03:55:15,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 03:55:15,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 03:55:15,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 03:55:15,826 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-26 03:55:15,827 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-26 03:55:15,827 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-26 03:55:15,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 03:55:15,827 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-26 03:55:15,828 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 03:55:15,828 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 03:55:15,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 03:55:15,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 03:55:15,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 03:55:15,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 03:55:15,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 03:55:15,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 03:55:15,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 03:55:15,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 03:55:15,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 03:55:15,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 03:55:15,832 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbb7e06bf350f46f725ea0ddc5d1215829061b3a [2020-10-26 03:55:16,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 03:55:16,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 03:55:16,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 03:55:16,305 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 03:55:16,306 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 03:55:16,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_12.c [2020-10-26 03:55:16,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf910dd1/08a948c2d3494fb6ab0d514a45b34215/FLAG08b2b16c0 [2020-10-26 03:55:17,042 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 03:55:17,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_12.c [2020-10-26 03:55:17,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf910dd1/08a948c2d3494fb6ab0d514a45b34215/FLAG08b2b16c0 [2020-10-26 03:55:17,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf910dd1/08a948c2d3494fb6ab0d514a45b34215 [2020-10-26 03:55:17,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 03:55:17,422 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-26 03:55:17,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 03:55:17,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 03:55:17,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 03:55:17,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 03:55:17" (1/1) ... [2020-10-26 03:55:17,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ccb3af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:17, skipping insertion in model container [2020-10-26 03:55:17,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 03:55:17" (1/1) ... [2020-10-26 03:55:17,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 03:55:17,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 03:55:17,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 03:55:17,675 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 03:55:17,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 03:55:17,727 INFO L208 MainTranslator]: Completed translation [2020-10-26 03:55:17,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:17 WrapperNode [2020-10-26 03:55:17,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 03:55:17,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 03:55:17,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 03:55:17,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 03:55:17,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:17" (1/1) ... [2020-10-26 03:55:17,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:17" (1/1) ... [2020-10-26 03:55:17,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:17" (1/1) ... [2020-10-26 03:55:17,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:17" (1/1) ... [2020-10-26 03:55:17,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:17" (1/1) ... [2020-10-26 03:55:17,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:17" (1/1) ... [2020-10-26 03:55:17,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:17" (1/1) ... [2020-10-26 03:55:17,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 03:55:17,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 03:55:17,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 03:55:17,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 03:55:17,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 03:55:17,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 03:55:17,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 03:55:17,877 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 03:55:17,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 03:55:17,878 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 03:55:17,878 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 03:55:17,878 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 03:55:17,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 03:55:17,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 03:55:17,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 03:55:17,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 03:55:17,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 03:55:17,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 03:55:17,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 03:55:17,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 03:55:17,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 03:55:18,485 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 03:55:18,485 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 03:55:18,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:55:18 BoogieIcfgContainer [2020-10-26 03:55:18,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 03:55:18,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 03:55:18,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 03:55:18,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 03:55:18,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 03:55:17" (1/3) ... [2020-10-26 03:55:18,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13091846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 03:55:18, skipping insertion in model container [2020-10-26 03:55:18,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:17" (2/3) ... [2020-10-26 03:55:18,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13091846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 03:55:18, skipping insertion in model container [2020-10-26 03:55:18,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:55:18" (3/3) ... [2020-10-26 03:55:18,508 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2020-10-26 03:55:18,522 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 03:55:18,529 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-26 03:55:18,548 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-26 03:55:18,594 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 03:55:18,595 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-26 03:55:18,595 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 03:55:18,595 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 03:55:18,595 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 03:55:18,596 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 03:55:18,596 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 03:55:18,596 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 03:55:18,624 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-26 03:55:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-26 03:55:18,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:18,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:18,639 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:18,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:18,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1172154548, now seen corresponding path program 1 times [2020-10-26 03:55:18,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:18,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722087591] [2020-10-26 03:55:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:19,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:19,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722087591] [2020-10-26 03:55:19,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:19,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 03:55:19,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426746946] [2020-10-26 03:55:19,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 03:55:19,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:19,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 03:55:19,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 03:55:19,125 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-10-26 03:55:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:19,187 INFO L93 Difference]: Finished difference Result 52 states and 87 transitions. [2020-10-26 03:55:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 03:55:19,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-26 03:55:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:19,203 INFO L225 Difference]: With dead ends: 52 [2020-10-26 03:55:19,203 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 03:55:19,205 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 [2020-10-26 03:55:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 03:55:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-26 03:55:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 03:55:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 82 transitions. [2020-10-26 03:55:19,250 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 82 transitions. Word has length 9 [2020-10-26 03:55:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:19,251 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 82 transitions. [2020-10-26 03:55:19,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 03:55:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 82 transitions. [2020-10-26 03:55:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 03:55:19,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:19,253 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] [2020-10-26 03:55:19,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 03:55:19,254 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:19,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:19,255 INFO L82 PathProgramCache]: Analyzing trace with hash 120209725, now seen corresponding path program 1 times [2020-10-26 03:55:19,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:19,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342959121] [2020-10-26 03:55:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:19,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:19,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342959121] [2020-10-26 03:55:19,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:19,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:19,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985749039] [2020-10-26 03:55:19,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:19,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:19,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:19,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:19,395 INFO L87 Difference]: Start difference. First operand 47 states and 82 transitions. Second operand 4 states. [2020-10-26 03:55:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:19,647 INFO L93 Difference]: Finished difference Result 85 states and 154 transitions. [2020-10-26 03:55:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:19,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-26 03:55:19,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:19,651 INFO L225 Difference]: With dead ends: 85 [2020-10-26 03:55:19,652 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 03:55:19,652 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 [2020-10-26 03:55:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 03:55:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2020-10-26 03:55:19,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 03:55:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 107 transitions. [2020-10-26 03:55:19,665 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 107 transitions. Word has length 24 [2020-10-26 03:55:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:19,666 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 107 transitions. [2020-10-26 03:55:19,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 107 transitions. [2020-10-26 03:55:19,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 03:55:19,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:19,668 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] [2020-10-26 03:55:19,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 03:55:19,669 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:19,669 INFO L82 PathProgramCache]: Analyzing trace with hash -900858629, now seen corresponding path program 1 times [2020-10-26 03:55:19,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:19,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542658879] [2020-10-26 03:55:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:19,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:19,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542658879] [2020-10-26 03:55:19,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:19,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:19,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816878524] [2020-10-26 03:55:19,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:19,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:19,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:19,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:19,812 INFO L87 Difference]: Start difference. First operand 60 states and 107 transitions. Second operand 4 states. [2020-10-26 03:55:20,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:20,038 INFO L93 Difference]: Finished difference Result 85 states and 152 transitions. [2020-10-26 03:55:20,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:20,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-26 03:55:20,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:20,042 INFO L225 Difference]: With dead ends: 85 [2020-10-26 03:55:20,042 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 03:55:20,043 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 [2020-10-26 03:55:20,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 03:55:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-26 03:55:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 03:55:20,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 151 transitions. [2020-10-26 03:55:20,057 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 151 transitions. Word has length 24 [2020-10-26 03:55:20,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:20,058 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 151 transitions. [2020-10-26 03:55:20,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:20,058 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 151 transitions. [2020-10-26 03:55:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 03:55:20,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:20,060 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] [2020-10-26 03:55:20,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 03:55:20,061 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:20,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:20,062 INFO L82 PathProgramCache]: Analyzing trace with hash -561878445, now seen corresponding path program 1 times [2020-10-26 03:55:20,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:20,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268534550] [2020-10-26 03:55:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:20,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:20,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268534550] [2020-10-26 03:55:20,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:20,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:20,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468341234] [2020-10-26 03:55:20,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:20,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:20,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:20,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:20,157 INFO L87 Difference]: Start difference. First operand 84 states and 151 transitions. Second operand 4 states. [2020-10-26 03:55:20,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:20,361 INFO L93 Difference]: Finished difference Result 88 states and 154 transitions. [2020-10-26 03:55:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:20,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-26 03:55:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:20,363 INFO L225 Difference]: With dead ends: 88 [2020-10-26 03:55:20,363 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 03:55:20,364 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 [2020-10-26 03:55:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 03:55:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-26 03:55:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 03:55:20,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 153 transitions. [2020-10-26 03:55:20,375 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 153 transitions. Word has length 25 [2020-10-26 03:55:20,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:20,376 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 153 transitions. [2020-10-26 03:55:20,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:20,376 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 153 transitions. [2020-10-26 03:55:20,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 03:55:20,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:20,378 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] [2020-10-26 03:55:20,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 03:55:20,378 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:20,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:20,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2144740949, now seen corresponding path program 1 times [2020-10-26 03:55:20,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:20,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913229107] [2020-10-26 03:55:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:20,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:20,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913229107] [2020-10-26 03:55:20,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:20,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:20,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887911889] [2020-10-26 03:55:20,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:20,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:20,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:20,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:20,460 INFO L87 Difference]: Start difference. First operand 87 states and 153 transitions. Second operand 4 states. [2020-10-26 03:55:20,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:20,653 INFO L93 Difference]: Finished difference Result 161 states and 287 transitions. [2020-10-26 03:55:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:20,654 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-26 03:55:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:20,656 INFO L225 Difference]: With dead ends: 161 [2020-10-26 03:55:20,656 INFO L226 Difference]: Without dead ends: 161 [2020-10-26 03:55:20,657 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 [2020-10-26 03:55:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-26 03:55:20,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-26 03:55:20,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-26 03:55:20,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 286 transitions. [2020-10-26 03:55:20,671 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 286 transitions. Word has length 25 [2020-10-26 03:55:20,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:20,672 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 286 transitions. [2020-10-26 03:55:20,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 286 transitions. [2020-10-26 03:55:20,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 03:55:20,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:20,674 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] [2020-10-26 03:55:20,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 03:55:20,675 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:20,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:20,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1129157993, now seen corresponding path program 1 times [2020-10-26 03:55:20,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:20,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585033321] [2020-10-26 03:55:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:20,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:20,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585033321] [2020-10-26 03:55:20,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:20,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:20,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161410484] [2020-10-26 03:55:20,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:20,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:20,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:20,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:20,756 INFO L87 Difference]: Start difference. First operand 160 states and 286 transitions. Second operand 4 states. [2020-10-26 03:55:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:20,926 INFO L93 Difference]: Finished difference Result 205 states and 369 transitions. [2020-10-26 03:55:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:20,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-26 03:55:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:20,929 INFO L225 Difference]: With dead ends: 205 [2020-10-26 03:55:20,929 INFO L226 Difference]: Without dead ends: 205 [2020-10-26 03:55:20,930 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 [2020-10-26 03:55:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-26 03:55:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2020-10-26 03:55:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-26 03:55:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 284 transitions. [2020-10-26 03:55:20,942 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 284 transitions. Word has length 25 [2020-10-26 03:55:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:20,943 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 284 transitions. [2020-10-26 03:55:20,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 284 transitions. [2020-10-26 03:55:20,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 03:55:20,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:20,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:20,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 03:55:20,945 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:20,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:20,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2069057926, now seen corresponding path program 1 times [2020-10-26 03:55:20,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:20,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862148773] [2020-10-26 03:55:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:21,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:21,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862148773] [2020-10-26 03:55:21,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:21,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:21,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356386457] [2020-10-26 03:55:21,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:21,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:21,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:21,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:21,071 INFO L87 Difference]: Start difference. First operand 160 states and 284 transitions. Second operand 4 states. [2020-10-26 03:55:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:21,269 INFO L93 Difference]: Finished difference Result 297 states and 535 transitions. [2020-10-26 03:55:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:21,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-26 03:55:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:21,273 INFO L225 Difference]: With dead ends: 297 [2020-10-26 03:55:21,273 INFO L226 Difference]: Without dead ends: 297 [2020-10-26 03:55:21,273 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 [2020-10-26 03:55:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-26 03:55:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 216. [2020-10-26 03:55:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-26 03:55:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 382 transitions. [2020-10-26 03:55:21,286 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 382 transitions. Word has length 26 [2020-10-26 03:55:21,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:21,287 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 382 transitions. [2020-10-26 03:55:21,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 382 transitions. [2020-10-26 03:55:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 03:55:21,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:21,290 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] [2020-10-26 03:55:21,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 03:55:21,291 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:21,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1047989572, now seen corresponding path program 1 times [2020-10-26 03:55:21,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:21,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561815721] [2020-10-26 03:55:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:21,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:21,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561815721] [2020-10-26 03:55:21,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:21,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:21,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782830095] [2020-10-26 03:55:21,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:21,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:21,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:21,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:21,387 INFO L87 Difference]: Start difference. First operand 216 states and 382 transitions. Second operand 4 states. [2020-10-26 03:55:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:21,571 INFO L93 Difference]: Finished difference Result 305 states and 537 transitions. [2020-10-26 03:55:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:21,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-26 03:55:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:21,574 INFO L225 Difference]: With dead ends: 305 [2020-10-26 03:55:21,574 INFO L226 Difference]: Without dead ends: 305 [2020-10-26 03:55:21,575 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 [2020-10-26 03:55:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-26 03:55:21,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2020-10-26 03:55:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-26 03:55:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 536 transitions. [2020-10-26 03:55:21,589 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 536 transitions. Word has length 26 [2020-10-26 03:55:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:21,590 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 536 transitions. [2020-10-26 03:55:21,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 536 transitions. [2020-10-26 03:55:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 03:55:21,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:21,592 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] [2020-10-26 03:55:21,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 03:55:21,593 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:21,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:21,594 INFO L82 PathProgramCache]: Analyzing trace with hash -277105216, now seen corresponding path program 1 times [2020-10-26 03:55:21,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:21,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753074125] [2020-10-26 03:55:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:21,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:21,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753074125] [2020-10-26 03:55:21,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:21,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:21,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075957386] [2020-10-26 03:55:21,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:21,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:21,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:21,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:21,655 INFO L87 Difference]: Start difference. First operand 304 states and 536 transitions. Second operand 4 states. [2020-10-26 03:55:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:21,817 INFO L93 Difference]: Finished difference Result 311 states and 541 transitions. [2020-10-26 03:55:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:21,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-26 03:55:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:21,820 INFO L225 Difference]: With dead ends: 311 [2020-10-26 03:55:21,820 INFO L226 Difference]: Without dead ends: 311 [2020-10-26 03:55:21,821 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 [2020-10-26 03:55:21,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-26 03:55:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2020-10-26 03:55:21,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-26 03:55:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 540 transitions. [2020-10-26 03:55:21,831 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 540 transitions. Word has length 27 [2020-10-26 03:55:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:21,832 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 540 transitions. [2020-10-26 03:55:21,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 540 transitions. [2020-10-26 03:55:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 03:55:21,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:21,834 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] [2020-10-26 03:55:21,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 03:55:21,834 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:21,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:21,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1865453118, now seen corresponding path program 1 times [2020-10-26 03:55:21,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:21,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601344818] [2020-10-26 03:55:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:21,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:21,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601344818] [2020-10-26 03:55:21,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:21,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:21,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100550110] [2020-10-26 03:55:21,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:21,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:21,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:21,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:21,897 INFO L87 Difference]: Start difference. First operand 310 states and 540 transitions. Second operand 4 states. [2020-10-26 03:55:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:22,087 INFO L93 Difference]: Finished difference Result 571 states and 1005 transitions. [2020-10-26 03:55:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:22,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-26 03:55:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:22,091 INFO L225 Difference]: With dead ends: 571 [2020-10-26 03:55:22,092 INFO L226 Difference]: Without dead ends: 571 [2020-10-26 03:55:22,092 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 [2020-10-26 03:55:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-10-26 03:55:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 426. [2020-10-26 03:55:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-26 03:55:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 732 transitions. [2020-10-26 03:55:22,108 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 732 transitions. Word has length 27 [2020-10-26 03:55:22,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:22,108 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 732 transitions. [2020-10-26 03:55:22,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:22,109 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 732 transitions. [2020-10-26 03:55:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 03:55:22,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:22,110 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] [2020-10-26 03:55:22,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 03:55:22,111 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:22,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1408445824, now seen corresponding path program 1 times [2020-10-26 03:55:22,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:22,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180107952] [2020-10-26 03:55:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:22,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:22,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180107952] [2020-10-26 03:55:22,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:22,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:22,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667454935] [2020-10-26 03:55:22,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:22,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:22,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:22,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:22,172 INFO L87 Difference]: Start difference. First operand 426 states and 732 transitions. Second operand 4 states. [2020-10-26 03:55:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:22,336 INFO L93 Difference]: Finished difference Result 595 states and 1017 transitions. [2020-10-26 03:55:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:22,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-26 03:55:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:22,340 INFO L225 Difference]: With dead ends: 595 [2020-10-26 03:55:22,340 INFO L226 Difference]: Without dead ends: 595 [2020-10-26 03:55:22,341 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 [2020-10-26 03:55:22,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-26 03:55:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 594. [2020-10-26 03:55:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 594 states. [2020-10-26 03:55:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1016 transitions. [2020-10-26 03:55:22,359 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1016 transitions. Word has length 27 [2020-10-26 03:55:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:22,359 INFO L481 AbstractCegarLoop]: Abstraction has 594 states and 1016 transitions. [2020-10-26 03:55:22,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1016 transitions. [2020-10-26 03:55:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 03:55:22,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:22,361 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] [2020-10-26 03:55:22,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 03:55:22,362 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:22,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1987852721, now seen corresponding path program 1 times [2020-10-26 03:55:22,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:22,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822902516] [2020-10-26 03:55:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:22,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:22,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822902516] [2020-10-26 03:55:22,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:22,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:22,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262407272] [2020-10-26 03:55:22,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:22,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:22,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:22,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:22,416 INFO L87 Difference]: Start difference. First operand 594 states and 1016 transitions. Second operand 4 states. [2020-10-26 03:55:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:22,600 INFO L93 Difference]: Finished difference Result 603 states and 1017 transitions. [2020-10-26 03:55:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:22,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-26 03:55:22,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:22,606 INFO L225 Difference]: With dead ends: 603 [2020-10-26 03:55:22,606 INFO L226 Difference]: Without dead ends: 603 [2020-10-26 03:55:22,606 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 [2020-10-26 03:55:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-26 03:55:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 602. [2020-10-26 03:55:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-10-26 03:55:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1016 transitions. [2020-10-26 03:55:22,630 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1016 transitions. Word has length 28 [2020-10-26 03:55:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:22,630 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 1016 transitions. [2020-10-26 03:55:22,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1016 transitions. [2020-10-26 03:55:22,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 03:55:22,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:22,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:22,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 03:55:22,633 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:22,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:22,633 INFO L82 PathProgramCache]: Analyzing trace with hash 718766673, now seen corresponding path program 1 times [2020-10-26 03:55:22,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:22,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667694849] [2020-10-26 03:55:22,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:22,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:22,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667694849] [2020-10-26 03:55:22,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:22,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:22,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435252207] [2020-10-26 03:55:22,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:22,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:22,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:22,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:22,729 INFO L87 Difference]: Start difference. First operand 602 states and 1016 transitions. Second operand 4 states. [2020-10-26 03:55:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:22,908 INFO L93 Difference]: Finished difference Result 1099 states and 1873 transitions. [2020-10-26 03:55:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:22,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-26 03:55:22,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:22,915 INFO L225 Difference]: With dead ends: 1099 [2020-10-26 03:55:22,916 INFO L226 Difference]: Without dead ends: 1099 [2020-10-26 03:55:22,916 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 [2020-10-26 03:55:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2020-10-26 03:55:22,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 842. [2020-10-26 03:55:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-10-26 03:55:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1392 transitions. [2020-10-26 03:55:22,946 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1392 transitions. Word has length 28 [2020-10-26 03:55:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:22,946 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1392 transitions. [2020-10-26 03:55:22,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1392 transitions. [2020-10-26 03:55:22,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 03:55:22,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:22,948 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] [2020-10-26 03:55:22,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 03:55:22,949 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:22,950 INFO L82 PathProgramCache]: Analyzing trace with hash -302301681, now seen corresponding path program 1 times [2020-10-26 03:55:22,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:22,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597103625] [2020-10-26 03:55:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:23,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:23,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597103625] [2020-10-26 03:55:23,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:23,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:23,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153647631] [2020-10-26 03:55:23,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:23,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:23,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:23,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:23,035 INFO L87 Difference]: Start difference. First operand 842 states and 1392 transitions. Second operand 4 states. [2020-10-26 03:55:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:23,206 INFO L93 Difference]: Finished difference Result 1163 states and 1913 transitions. [2020-10-26 03:55:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:23,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-26 03:55:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:23,213 INFO L225 Difference]: With dead ends: 1163 [2020-10-26 03:55:23,213 INFO L226 Difference]: Without dead ends: 1163 [2020-10-26 03:55:23,214 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 [2020-10-26 03:55:23,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2020-10-26 03:55:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1162. [2020-10-26 03:55:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-10-26 03:55:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1912 transitions. [2020-10-26 03:55:23,250 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1912 transitions. Word has length 28 [2020-10-26 03:55:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:23,251 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1912 transitions. [2020-10-26 03:55:23,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1912 transitions. [2020-10-26 03:55:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 03:55:23,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:23,253 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] [2020-10-26 03:55:23,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 03:55:23,254 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:23,255 INFO L82 PathProgramCache]: Analyzing trace with hash 813560043, now seen corresponding path program 1 times [2020-10-26 03:55:23,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:23,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566014798] [2020-10-26 03:55:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:23,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:23,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566014798] [2020-10-26 03:55:23,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:23,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:23,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222990470] [2020-10-26 03:55:23,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:23,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:23,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:23,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:23,305 INFO L87 Difference]: Start difference. First operand 1162 states and 1912 transitions. Second operand 4 states. [2020-10-26 03:55:23,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:23,476 INFO L93 Difference]: Finished difference Result 1179 states and 1913 transitions. [2020-10-26 03:55:23,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:23,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-26 03:55:23,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:23,483 INFO L225 Difference]: With dead ends: 1179 [2020-10-26 03:55:23,484 INFO L226 Difference]: Without dead ends: 1179 [2020-10-26 03:55:23,486 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 [2020-10-26 03:55:23,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2020-10-26 03:55:23,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1178. [2020-10-26 03:55:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1178 states. [2020-10-26 03:55:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1912 transitions. [2020-10-26 03:55:23,525 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1912 transitions. Word has length 29 [2020-10-26 03:55:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:23,526 INFO L481 AbstractCegarLoop]: Abstraction has 1178 states and 1912 transitions. [2020-10-26 03:55:23,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1912 transitions. [2020-10-26 03:55:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 03:55:23,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:23,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:23,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 03:55:23,531 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:23,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:23,531 INFO L82 PathProgramCache]: Analyzing trace with hash -774787859, now seen corresponding path program 1 times [2020-10-26 03:55:23,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:23,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898328957] [2020-10-26 03:55:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:23,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:23,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898328957] [2020-10-26 03:55:23,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:23,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:23,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655948900] [2020-10-26 03:55:23,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:23,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:23,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:23,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:23,641 INFO L87 Difference]: Start difference. First operand 1178 states and 1912 transitions. Second operand 4 states. [2020-10-26 03:55:23,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:23,840 INFO L93 Difference]: Finished difference Result 2123 states and 3481 transitions. [2020-10-26 03:55:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:23,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-26 03:55:23,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:23,853 INFO L225 Difference]: With dead ends: 2123 [2020-10-26 03:55:23,853 INFO L226 Difference]: Without dead ends: 2123 [2020-10-26 03:55:23,854 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 [2020-10-26 03:55:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2020-10-26 03:55:23,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1674. [2020-10-26 03:55:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2020-10-26 03:55:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2648 transitions. [2020-10-26 03:55:23,905 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2648 transitions. Word has length 29 [2020-10-26 03:55:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:23,905 INFO L481 AbstractCegarLoop]: Abstraction has 1674 states and 2648 transitions. [2020-10-26 03:55:23,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2648 transitions. [2020-10-26 03:55:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 03:55:23,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:23,908 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] [2020-10-26 03:55:23,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 03:55:23,909 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1795856213, now seen corresponding path program 1 times [2020-10-26 03:55:23,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:23,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132968190] [2020-10-26 03:55:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:23,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:23,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132968190] [2020-10-26 03:55:23,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:23,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:23,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974025725] [2020-10-26 03:55:23,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:23,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:23,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:23,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:23,970 INFO L87 Difference]: Start difference. First operand 1674 states and 2648 transitions. Second operand 4 states. [2020-10-26 03:55:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:24,161 INFO L93 Difference]: Finished difference Result 2283 states and 3593 transitions. [2020-10-26 03:55:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:24,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-26 03:55:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:24,174 INFO L225 Difference]: With dead ends: 2283 [2020-10-26 03:55:24,175 INFO L226 Difference]: Without dead ends: 2283 [2020-10-26 03:55:24,176 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 [2020-10-26 03:55:24,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2020-10-26 03:55:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2282. [2020-10-26 03:55:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2020-10-26 03:55:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3592 transitions. [2020-10-26 03:55:24,254 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3592 transitions. Word has length 29 [2020-10-26 03:55:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:24,254 INFO L481 AbstractCegarLoop]: Abstraction has 2282 states and 3592 transitions. [2020-10-26 03:55:24,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3592 transitions. [2020-10-26 03:55:24,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 03:55:24,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:24,260 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] [2020-10-26 03:55:24,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 03:55:24,261 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:24,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:24,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1758020378, now seen corresponding path program 1 times [2020-10-26 03:55:24,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:24,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626252577] [2020-10-26 03:55:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:24,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:24,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626252577] [2020-10-26 03:55:24,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:24,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:24,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349060768] [2020-10-26 03:55:24,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:24,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:24,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:24,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:24,343 INFO L87 Difference]: Start difference. First operand 2282 states and 3592 transitions. Second operand 4 states. [2020-10-26 03:55:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:24,535 INFO L93 Difference]: Finished difference Result 2315 states and 3593 transitions. [2020-10-26 03:55:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:24,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-26 03:55:24,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:24,550 INFO L225 Difference]: With dead ends: 2315 [2020-10-26 03:55:24,550 INFO L226 Difference]: Without dead ends: 2315 [2020-10-26 03:55:24,551 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 [2020-10-26 03:55:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2020-10-26 03:55:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2314. [2020-10-26 03:55:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-10-26 03:55:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3592 transitions. [2020-10-26 03:55:24,634 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3592 transitions. Word has length 30 [2020-10-26 03:55:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:24,634 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 3592 transitions. [2020-10-26 03:55:24,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3592 transitions. [2020-10-26 03:55:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 03:55:24,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:24,638 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] [2020-10-26 03:55:24,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 03:55:24,639 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:24,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:24,639 INFO L82 PathProgramCache]: Analyzing trace with hash 169672476, now seen corresponding path program 1 times [2020-10-26 03:55:24,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:24,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066876545] [2020-10-26 03:55:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:24,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:24,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066876545] [2020-10-26 03:55:24,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:24,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:24,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101870098] [2020-10-26 03:55:24,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:24,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:24,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:24,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:24,711 INFO L87 Difference]: Start difference. First operand 2314 states and 3592 transitions. Second operand 4 states. [2020-10-26 03:55:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:24,891 INFO L93 Difference]: Finished difference Result 4107 states and 6441 transitions. [2020-10-26 03:55:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:24,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-26 03:55:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:24,914 INFO L225 Difference]: With dead ends: 4107 [2020-10-26 03:55:24,915 INFO L226 Difference]: Without dead ends: 4107 [2020-10-26 03:55:24,915 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 [2020-10-26 03:55:24,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2020-10-26 03:55:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3338. [2020-10-26 03:55:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3338 states. [2020-10-26 03:55:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 5032 transitions. [2020-10-26 03:55:25,060 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 5032 transitions. Word has length 30 [2020-10-26 03:55:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:25,061 INFO L481 AbstractCegarLoop]: Abstraction has 3338 states and 5032 transitions. [2020-10-26 03:55:25,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 5032 transitions. [2020-10-26 03:55:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 03:55:25,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:25,068 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] [2020-10-26 03:55:25,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 03:55:25,069 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:25,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:25,070 INFO L82 PathProgramCache]: Analyzing trace with hash -851395878, now seen corresponding path program 1 times [2020-10-26 03:55:25,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:25,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239781404] [2020-10-26 03:55:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:25,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:25,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239781404] [2020-10-26 03:55:25,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:25,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:25,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38915158] [2020-10-26 03:55:25,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:25,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:25,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:25,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:25,138 INFO L87 Difference]: Start difference. First operand 3338 states and 5032 transitions. Second operand 4 states. [2020-10-26 03:55:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:25,321 INFO L93 Difference]: Finished difference Result 4491 states and 6729 transitions. [2020-10-26 03:55:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:25,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-26 03:55:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:25,347 INFO L225 Difference]: With dead ends: 4491 [2020-10-26 03:55:25,348 INFO L226 Difference]: Without dead ends: 4491 [2020-10-26 03:55:25,348 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 [2020-10-26 03:55:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2020-10-26 03:55:25,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 4490. [2020-10-26 03:55:25,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4490 states. [2020-10-26 03:55:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 6728 transitions. [2020-10-26 03:55:25,511 INFO L78 Accepts]: Start accepts. Automaton has 4490 states and 6728 transitions. Word has length 30 [2020-10-26 03:55:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:25,512 INFO L481 AbstractCegarLoop]: Abstraction has 4490 states and 6728 transitions. [2020-10-26 03:55:25,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 4490 states and 6728 transitions. [2020-10-26 03:55:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 03:55:25,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:25,520 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] [2020-10-26 03:55:25,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 03:55:25,522 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:25,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:25,522 INFO L82 PathProgramCache]: Analyzing trace with hash 971530262, now seen corresponding path program 1 times [2020-10-26 03:55:25,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:25,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943914260] [2020-10-26 03:55:25,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:25,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:25,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943914260] [2020-10-26 03:55:25,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:25,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:25,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915135184] [2020-10-26 03:55:25,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:25,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:25,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:25,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:25,589 INFO L87 Difference]: Start difference. First operand 4490 states and 6728 transitions. Second operand 4 states. [2020-10-26 03:55:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:25,748 INFO L93 Difference]: Finished difference Result 4555 states and 6729 transitions. [2020-10-26 03:55:25,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:25,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-26 03:55:25,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:25,784 INFO L225 Difference]: With dead ends: 4555 [2020-10-26 03:55:25,786 INFO L226 Difference]: Without dead ends: 4555 [2020-10-26 03:55:25,786 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 [2020-10-26 03:55:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2020-10-26 03:55:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 4554. [2020-10-26 03:55:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4554 states. [2020-10-26 03:55:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 6728 transitions. [2020-10-26 03:55:25,934 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 6728 transitions. Word has length 31 [2020-10-26 03:55:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:25,935 INFO L481 AbstractCegarLoop]: Abstraction has 4554 states and 6728 transitions. [2020-10-26 03:55:25,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 6728 transitions. [2020-10-26 03:55:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 03:55:25,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:25,943 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] [2020-10-26 03:55:25,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 03:55:25,944 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:25,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:25,944 INFO L82 PathProgramCache]: Analyzing trace with hash -616817640, now seen corresponding path program 1 times [2020-10-26 03:55:25,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:25,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451030140] [2020-10-26 03:55:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:25,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:26,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451030140] [2020-10-26 03:55:26,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:26,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:26,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555527259] [2020-10-26 03:55:26,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:26,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:26,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:26,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:26,005 INFO L87 Difference]: Start difference. First operand 4554 states and 6728 transitions. Second operand 4 states. [2020-10-26 03:55:26,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:26,198 INFO L93 Difference]: Finished difference Result 7947 states and 11849 transitions. [2020-10-26 03:55:26,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:26,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-26 03:55:26,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:26,219 INFO L225 Difference]: With dead ends: 7947 [2020-10-26 03:55:26,219 INFO L226 Difference]: Without dead ends: 7947 [2020-10-26 03:55:26,220 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 [2020-10-26 03:55:26,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2020-10-26 03:55:26,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 6666. [2020-10-26 03:55:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6666 states. [2020-10-26 03:55:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 9544 transitions. [2020-10-26 03:55:26,392 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 9544 transitions. Word has length 31 [2020-10-26 03:55:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:26,392 INFO L481 AbstractCegarLoop]: Abstraction has 6666 states and 9544 transitions. [2020-10-26 03:55:26,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 9544 transitions. [2020-10-26 03:55:26,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 03:55:26,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:26,403 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] [2020-10-26 03:55:26,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 03:55:26,404 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:26,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:26,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1637885994, now seen corresponding path program 1 times [2020-10-26 03:55:26,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:26,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086755651] [2020-10-26 03:55:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:26,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:26,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086755651] [2020-10-26 03:55:26,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:26,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:26,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868560909] [2020-10-26 03:55:26,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:26,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:26,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:26,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:26,459 INFO L87 Difference]: Start difference. First operand 6666 states and 9544 transitions. Second operand 4 states. [2020-10-26 03:55:26,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:26,625 INFO L93 Difference]: Finished difference Result 8843 states and 12553 transitions. [2020-10-26 03:55:26,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:26,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-26 03:55:26,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:26,644 INFO L225 Difference]: With dead ends: 8843 [2020-10-26 03:55:26,644 INFO L226 Difference]: Without dead ends: 8843 [2020-10-26 03:55:26,645 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 [2020-10-26 03:55:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2020-10-26 03:55:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8842. [2020-10-26 03:55:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8842 states. [2020-10-26 03:55:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8842 states to 8842 states and 12552 transitions. [2020-10-26 03:55:26,850 INFO L78 Accepts]: Start accepts. Automaton has 8842 states and 12552 transitions. Word has length 31 [2020-10-26 03:55:26,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:26,851 INFO L481 AbstractCegarLoop]: Abstraction has 8842 states and 12552 transitions. [2020-10-26 03:55:26,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:26,851 INFO L276 IsEmpty]: Start isEmpty. Operand 8842 states and 12552 transitions. [2020-10-26 03:55:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 03:55:26,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:26,862 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] [2020-10-26 03:55:26,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 03:55:26,863 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:26,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1934816283, now seen corresponding path program 1 times [2020-10-26 03:55:26,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:26,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330658443] [2020-10-26 03:55:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:26,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:26,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330658443] [2020-10-26 03:55:26,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:26,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:26,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543043462] [2020-10-26 03:55:26,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:26,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:26,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:26,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:26,912 INFO L87 Difference]: Start difference. First operand 8842 states and 12552 transitions. Second operand 4 states. [2020-10-26 03:55:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:27,126 INFO L93 Difference]: Finished difference Result 8971 states and 12553 transitions. [2020-10-26 03:55:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:27,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-26 03:55:27,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:27,148 INFO L225 Difference]: With dead ends: 8971 [2020-10-26 03:55:27,148 INFO L226 Difference]: Without dead ends: 8971 [2020-10-26 03:55:27,149 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 [2020-10-26 03:55:27,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2020-10-26 03:55:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 8970. [2020-10-26 03:55:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8970 states. [2020-10-26 03:55:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8970 states to 8970 states and 12552 transitions. [2020-10-26 03:55:27,324 INFO L78 Accepts]: Start accepts. Automaton has 8970 states and 12552 transitions. Word has length 32 [2020-10-26 03:55:27,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:27,325 INFO L481 AbstractCegarLoop]: Abstraction has 8970 states and 12552 transitions. [2020-10-26 03:55:27,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 8970 states and 12552 transitions. [2020-10-26 03:55:27,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 03:55:27,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:27,336 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] [2020-10-26 03:55:27,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 03:55:27,337 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:27,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash 771803111, now seen corresponding path program 1 times [2020-10-26 03:55:27,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:27,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46084556] [2020-10-26 03:55:27,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:27,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:27,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46084556] [2020-10-26 03:55:27,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:27,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:27,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079421441] [2020-10-26 03:55:27,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:27,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:27,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:27,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:27,446 INFO L87 Difference]: Start difference. First operand 8970 states and 12552 transitions. Second operand 4 states. [2020-10-26 03:55:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:27,664 INFO L93 Difference]: Finished difference Result 15371 states and 21641 transitions. [2020-10-26 03:55:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:27,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-26 03:55:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:27,702 INFO L225 Difference]: With dead ends: 15371 [2020-10-26 03:55:27,702 INFO L226 Difference]: Without dead ends: 15371 [2020-10-26 03:55:27,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 03:55:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2020-10-26 03:55:28,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 13322. [2020-10-26 03:55:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13322 states. [2020-10-26 03:55:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13322 states to 13322 states and 18056 transitions. [2020-10-26 03:55:28,135 INFO L78 Accepts]: Start accepts. Automaton has 13322 states and 18056 transitions. Word has length 32 [2020-10-26 03:55:28,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:28,136 INFO L481 AbstractCegarLoop]: Abstraction has 13322 states and 18056 transitions. [2020-10-26 03:55:28,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 13322 states and 18056 transitions. [2020-10-26 03:55:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 03:55:28,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:28,159 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] [2020-10-26 03:55:28,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 03:55:28,160 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:28,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:28,160 INFO L82 PathProgramCache]: Analyzing trace with hash -249265243, now seen corresponding path program 1 times [2020-10-26 03:55:28,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:28,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943898670] [2020-10-26 03:55:28,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:28,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:28,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943898670] [2020-10-26 03:55:28,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:28,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:28,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371124983] [2020-10-26 03:55:28,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:28,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:28,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:28,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:28,218 INFO L87 Difference]: Start difference. First operand 13322 states and 18056 transitions. Second operand 4 states. [2020-10-26 03:55:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:28,422 INFO L93 Difference]: Finished difference Result 17419 states and 23305 transitions. [2020-10-26 03:55:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:28,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-26 03:55:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:28,462 INFO L225 Difference]: With dead ends: 17419 [2020-10-26 03:55:28,463 INFO L226 Difference]: Without dead ends: 17419 [2020-10-26 03:55:28,463 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 [2020-10-26 03:55:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17419 states. [2020-10-26 03:55:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17419 to 17418. [2020-10-26 03:55:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17418 states. [2020-10-26 03:55:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17418 states to 17418 states and 23304 transitions. [2020-10-26 03:55:28,858 INFO L78 Accepts]: Start accepts. Automaton has 17418 states and 23304 transitions. Word has length 32 [2020-10-26 03:55:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:28,859 INFO L481 AbstractCegarLoop]: Abstraction has 17418 states and 23304 transitions. [2020-10-26 03:55:28,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 17418 states and 23304 transitions. [2020-10-26 03:55:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 03:55:28,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:28,881 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] [2020-10-26 03:55:28,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 03:55:28,881 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:28,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1837235391, now seen corresponding path program 1 times [2020-10-26 03:55:28,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:28,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810338664] [2020-10-26 03:55:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:28,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:28,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810338664] [2020-10-26 03:55:28,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:28,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:28,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964403164] [2020-10-26 03:55:28,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:28,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:28,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:28,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:28,936 INFO L87 Difference]: Start difference. First operand 17418 states and 23304 transitions. Second operand 4 states. [2020-10-26 03:55:29,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:29,126 INFO L93 Difference]: Finished difference Result 17675 states and 23305 transitions. [2020-10-26 03:55:29,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:29,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-26 03:55:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:29,162 INFO L225 Difference]: With dead ends: 17675 [2020-10-26 03:55:29,162 INFO L226 Difference]: Without dead ends: 17675 [2020-10-26 03:55:29,163 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 [2020-10-26 03:55:29,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17675 states. [2020-10-26 03:55:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17675 to 17674. [2020-10-26 03:55:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17674 states. [2020-10-26 03:55:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17674 states to 17674 states and 23304 transitions. [2020-10-26 03:55:29,652 INFO L78 Accepts]: Start accepts. Automaton has 17674 states and 23304 transitions. Word has length 33 [2020-10-26 03:55:29,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:29,653 INFO L481 AbstractCegarLoop]: Abstraction has 17674 states and 23304 transitions. [2020-10-26 03:55:29,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:29,653 INFO L276 IsEmpty]: Start isEmpty. Operand 17674 states and 23304 transitions. [2020-10-26 03:55:29,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 03:55:29,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:29,677 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] [2020-10-26 03:55:29,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 03:55:29,677 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:29,678 INFO L82 PathProgramCache]: Analyzing trace with hash 869384003, now seen corresponding path program 1 times [2020-10-26 03:55:29,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:29,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674775477] [2020-10-26 03:55:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:29,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:29,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674775477] [2020-10-26 03:55:29,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:29,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:29,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375190074] [2020-10-26 03:55:29,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:29,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:29,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:29,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:29,741 INFO L87 Difference]: Start difference. First operand 17674 states and 23304 transitions. Second operand 4 states. [2020-10-26 03:55:30,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:30,146 INFO L93 Difference]: Finished difference Result 34315 states and 43529 transitions. [2020-10-26 03:55:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:30,146 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-26 03:55:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:30,224 INFO L225 Difference]: With dead ends: 34315 [2020-10-26 03:55:30,224 INFO L226 Difference]: Without dead ends: 34315 [2020-10-26 03:55:30,225 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 [2020-10-26 03:55:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34315 states. [2020-10-26 03:55:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34315 to 34314. [2020-10-26 03:55:30,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34314 states. [2020-10-26 03:55:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34314 states to 34314 states and 43528 transitions. [2020-10-26 03:55:30,839 INFO L78 Accepts]: Start accepts. Automaton has 34314 states and 43528 transitions. Word has length 33 [2020-10-26 03:55:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:30,840 INFO L481 AbstractCegarLoop]: Abstraction has 34314 states and 43528 transitions. [2020-10-26 03:55:30,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:30,840 INFO L276 IsEmpty]: Start isEmpty. Operand 34314 states and 43528 transitions. [2020-10-26 03:55:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 03:55:31,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:31,023 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] [2020-10-26 03:55:31,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 03:55:31,024 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:31,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:31,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1890452357, now seen corresponding path program 1 times [2020-10-26 03:55:31,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:31,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928784208] [2020-10-26 03:55:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:31,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:31,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928784208] [2020-10-26 03:55:31,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:31,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:31,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401381077] [2020-10-26 03:55:31,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:31,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:31,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:31,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:31,118 INFO L87 Difference]: Start difference. First operand 34314 states and 43528 transitions. Second operand 4 states. [2020-10-26 03:55:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:31,537 INFO L93 Difference]: Finished difference Result 37387 states and 48137 transitions. [2020-10-26 03:55:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:31,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-26 03:55:31,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:31,621 INFO L225 Difference]: With dead ends: 37387 [2020-10-26 03:55:31,621 INFO L226 Difference]: Without dead ends: 37387 [2020-10-26 03:55:31,623 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 [2020-10-26 03:55:31,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37387 states. [2020-10-26 03:55:32,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37387 to 34314. [2020-10-26 03:55:32,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34314 states. [2020-10-26 03:55:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34314 states to 34314 states and 43016 transitions. [2020-10-26 03:55:32,301 INFO L78 Accepts]: Start accepts. Automaton has 34314 states and 43016 transitions. Word has length 33 [2020-10-26 03:55:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:32,302 INFO L481 AbstractCegarLoop]: Abstraction has 34314 states and 43016 transitions. [2020-10-26 03:55:32,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 34314 states and 43016 transitions. [2020-10-26 03:55:32,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 03:55:32,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:32,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:32,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 03:55:32,328 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:32,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1187782832, now seen corresponding path program 1 times [2020-10-26 03:55:32,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:32,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311313667] [2020-10-26 03:55:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:32,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:32,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311313667] [2020-10-26 03:55:32,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:32,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:32,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603876153] [2020-10-26 03:55:32,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:32,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:32,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:32,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:32,387 INFO L87 Difference]: Start difference. First operand 34314 states and 43016 transitions. Second operand 4 states. [2020-10-26 03:55:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:32,845 INFO L93 Difference]: Finished difference Result 56843 states and 70665 transitions. [2020-10-26 03:55:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:32,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-26 03:55:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:32,953 INFO L225 Difference]: With dead ends: 56843 [2020-10-26 03:55:32,953 INFO L226 Difference]: Without dead ends: 56843 [2020-10-26 03:55:32,954 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 [2020-10-26 03:55:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56843 states. [2020-10-26 03:55:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56843 to 52746. [2020-10-26 03:55:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52746 states. [2020-10-26 03:55:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52746 states to 52746 states and 64520 transitions. [2020-10-26 03:55:34,080 INFO L78 Accepts]: Start accepts. Automaton has 52746 states and 64520 transitions. Word has length 34 [2020-10-26 03:55:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:34,080 INFO L481 AbstractCegarLoop]: Abstraction has 52746 states and 64520 transitions. [2020-10-26 03:55:34,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 52746 states and 64520 transitions. [2020-10-26 03:55:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 03:55:34,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:34,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:34,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 03:55:34,185 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:34,186 INFO L82 PathProgramCache]: Analyzing trace with hash 166714478, now seen corresponding path program 1 times [2020-10-26 03:55:34,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:34,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977815220] [2020-10-26 03:55:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:34,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:34,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977815220] [2020-10-26 03:55:34,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:34,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:34,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593283283] [2020-10-26 03:55:34,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:34,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:34,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:34,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:34,250 INFO L87 Difference]: Start difference. First operand 52746 states and 64520 transitions. Second operand 4 states. [2020-10-26 03:55:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:34,593 INFO L93 Difference]: Finished difference Result 67083 states and 79881 transitions. [2020-10-26 03:55:34,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:34,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-26 03:55:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:34,686 INFO L225 Difference]: With dead ends: 67083 [2020-10-26 03:55:34,687 INFO L226 Difference]: Without dead ends: 67083 [2020-10-26 03:55:34,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 03:55:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67083 states. [2020-10-26 03:55:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67083 to 67082. [2020-10-26 03:55:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67082 states. [2020-10-26 03:55:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67082 states to 67082 states and 79880 transitions. [2020-10-26 03:55:35,965 INFO L78 Accepts]: Start accepts. Automaton has 67082 states and 79880 transitions. Word has length 34 [2020-10-26 03:55:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:35,965 INFO L481 AbstractCegarLoop]: Abstraction has 67082 states and 79880 transitions. [2020-10-26 03:55:35,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:35,966 INFO L276 IsEmpty]: Start isEmpty. Operand 67082 states and 79880 transitions. [2020-10-26 03:55:36,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 03:55:36,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:36,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:36,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 03:55:36,035 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:36,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:36,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1826744786, now seen corresponding path program 1 times [2020-10-26 03:55:36,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:36,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675999] [2020-10-26 03:55:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:36,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:36,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675999] [2020-10-26 03:55:36,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:36,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:36,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387648560] [2020-10-26 03:55:36,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:36,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:36,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:36,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:36,098 INFO L87 Difference]: Start difference. First operand 67082 states and 79880 transitions. Second operand 4 states. [2020-10-26 03:55:36,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:36,463 INFO L93 Difference]: Finished difference Result 68619 states and 80905 transitions. [2020-10-26 03:55:36,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:36,464 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-26 03:55:36,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:36,540 INFO L225 Difference]: With dead ends: 68619 [2020-10-26 03:55:36,541 INFO L226 Difference]: Without dead ends: 68619 [2020-10-26 03:55:36,542 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 [2020-10-26 03:55:36,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2020-10-26 03:55:37,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 68618. [2020-10-26 03:55:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68618 states. [2020-10-26 03:55:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68618 states to 68618 states and 80904 transitions. [2020-10-26 03:55:37,670 INFO L78 Accepts]: Start accepts. Automaton has 68618 states and 80904 transitions. Word has length 35 [2020-10-26 03:55:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:37,671 INFO L481 AbstractCegarLoop]: Abstraction has 68618 states and 80904 transitions. [2020-10-26 03:55:37,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 68618 states and 80904 transitions. [2020-10-26 03:55:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 03:55:37,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:37,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:37,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 03:55:37,707 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:37,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:37,707 INFO L82 PathProgramCache]: Analyzing trace with hash 879874608, now seen corresponding path program 1 times [2020-10-26 03:55:37,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:37,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374682217] [2020-10-26 03:55:37,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:37,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:37,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374682217] [2020-10-26 03:55:37,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:37,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:37,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972052865] [2020-10-26 03:55:37,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:37,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:37,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:37,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:37,771 INFO L87 Difference]: Start difference. First operand 68618 states and 80904 transitions. Second operand 4 states. [2020-10-26 03:55:38,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:38,587 INFO L93 Difference]: Finished difference Result 110602 states and 126984 transitions. [2020-10-26 03:55:38,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:38,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-26 03:55:38,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:38,712 INFO L225 Difference]: With dead ends: 110602 [2020-10-26 03:55:38,713 INFO L226 Difference]: Without dead ends: 110602 [2020-10-26 03:55:38,713 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 [2020-10-26 03:55:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110602 states. [2020-10-26 03:55:39,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110602 to 106506. [2020-10-26 03:55:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106506 states. [2020-10-26 03:55:40,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106506 states to 106506 states and 122888 transitions. [2020-10-26 03:55:40,470 INFO L78 Accepts]: Start accepts. Automaton has 106506 states and 122888 transitions. Word has length 35 [2020-10-26 03:55:40,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:40,470 INFO L481 AbstractCegarLoop]: Abstraction has 106506 states and 122888 transitions. [2020-10-26 03:55:40,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:40,470 INFO L276 IsEmpty]: Start isEmpty. Operand 106506 states and 122888 transitions. [2020-10-26 03:55:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 03:55:40,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:40,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:40,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 03:55:40,558 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:40,558 INFO L82 PathProgramCache]: Analyzing trace with hash -141193746, now seen corresponding path program 1 times [2020-10-26 03:55:40,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:40,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537253952] [2020-10-26 03:55:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:40,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:55:40,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537253952] [2020-10-26 03:55:40,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:40,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:40,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210536891] [2020-10-26 03:55:40,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:40,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:40,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:40,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:40,629 INFO L87 Difference]: Start difference. First operand 106506 states and 122888 transitions. Second operand 4 states. [2020-10-26 03:55:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:41,248 INFO L93 Difference]: Finished difference Result 133127 states and 147462 transitions. [2020-10-26 03:55:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:41,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-26 03:55:41,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:41,249 INFO L225 Difference]: With dead ends: 133127 [2020-10-26 03:55:41,249 INFO L226 Difference]: Without dead ends: 0 [2020-10-26 03:55:41,249 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 [2020-10-26 03:55:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-26 03:55:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-26 03:55:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-26 03:55:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-26 03:55:41,250 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-26 03:55:41,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:41,251 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 03:55:41,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:41,251 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-26 03:55:41,251 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-26 03:55:41,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 03:55:41,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 03:55:41 BoogieIcfgContainer [2020-10-26 03:55:41,260 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 03:55:41,260 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 03:55:41,260 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 03:55:41,261 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 03:55:41,262 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:55:18" (3/4) ... [2020-10-26 03:55:41,266 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-26 03:55:41,275 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-26 03:55:41,275 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-26 03:55:41,276 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-26 03:55:41,293 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-26 03:55:41,293 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-26 03:55:41,294 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-26 03:55:41,295 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-26 03:55:41,381 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 03:55:41,381 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 03:55:41,384 INFO L168 Benchmark]: Toolchain (without parser) took 23966.33 ms. Allocated memory was 41.9 MB in the beginning and 12.1 GB in the end (delta: 12.1 GB). Free memory was 19.3 MB in the beginning and 10.8 GB in the end (delta: -10.8 GB). Peak memory consumption was 1.3 GB. Max. memory is 16.1 GB. [2020-10-26 03:55:41,385 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 41.9 MB. Free memory was 28.7 MB in the beginning and 28.6 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 03:55:41,386 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.80 ms. Allocated memory is still 41.9 MB. Free memory was 18.7 MB in the beginning and 19.4 MB in the end (delta: -725.9 kB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-10-26 03:55:41,386 INFO L168 Benchmark]: Boogie Preprocessor took 52.42 ms. Allocated memory is still 41.9 MB. Free memory was 19.4 MB in the beginning and 17.6 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 03:55:41,387 INFO L168 Benchmark]: RCFGBuilder took 704.97 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 17.6 MB in the beginning and 25.0 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2020-10-26 03:55:41,388 INFO L168 Benchmark]: TraceAbstraction took 22767.73 ms. Allocated memory was 50.3 MB in the beginning and 12.1 GB in the end (delta: 12.1 GB). Free memory was 24.6 MB in the beginning and 10.8 GB in the end (delta: -10.8 GB). Peak memory consumption was 1.3 GB. Max. memory is 16.1 GB. [2020-10-26 03:55:41,389 INFO L168 Benchmark]: Witness Printer took 120.95 ms. Allocated memory is still 12.1 GB. Free memory was 10.8 GB in the beginning and 10.8 GB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-26 03:55:41,391 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 41.9 MB. Free memory was 28.7 MB in the beginning and 28.6 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 304.80 ms. Allocated memory is still 41.9 MB. Free memory was 18.7 MB in the beginning and 19.4 MB in the end (delta: -725.9 kB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.42 ms. Allocated memory is still 41.9 MB. Free memory was 19.4 MB in the beginning and 17.6 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 704.97 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 17.6 MB in the beginning and 25.0 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22767.73 ms. Allocated memory was 50.3 MB in the beginning and 12.1 GB in the end (delta: 12.1 GB). Free memory was 24.6 MB in the beginning and 10.8 GB in the end (delta: -10.8 GB). Peak memory consumption was 1.3 GB. Max. memory is 16.1 GB. * Witness Printer took 120.95 ms. Allocated memory is still 12.1 GB. Free memory was 10.8 GB in the beginning and 10.8 GB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 56 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.6s, OverallIterations: 34, TraceHistogramMax: 1, AutomataDifference: 9.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3442 SDtfs, 5053 SDslu, 255 SDs, 0 SdLazy, 2412 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 235 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106506occurred in iteration=33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 9.4s AutomataMinimizationTime, 34 MinimizatonAttempts, 16387 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 987 NumberOfCodeBlocks, 987 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 953 ConstructedInterpolants, 0 QuantifiedInterpolants, 82577 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...