./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_9.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_9.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 20a70402cc893fb2c7adec21ca8a267adc3c5cbb ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 03:55:53,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 03:55:53,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 03:55:53,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 03:55:53,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 03:55:53,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 03:55:53,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 03:55:53,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 03:55:53,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 03:55:53,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 03:55:53,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 03:55:53,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 03:55:53,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 03:55:53,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 03:55:53,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 03:55:53,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 03:55:53,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 03:55:53,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 03:55:53,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 03:55:53,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 03:55:53,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 03:55:53,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 03:55:53,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 03:55:53,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 03:55:53,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 03:55:53,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 03:55:53,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 03:55:53,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 03:55:53,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 03:55:53,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 03:55:53,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 03:55:53,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 03:55:53,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 03:55:53,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 03:55:53,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 03:55:53,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 03:55:53,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 03:55:53,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 03:55:53,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 03:55:53,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 03:55:53,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 03:55:53,963 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-26 03:55:54,021 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 03:55:54,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 03:55:54,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 03:55:54,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 03:55:54,025 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 03:55:54,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 03:55:54,026 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 03:55:54,026 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 03:55:54,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 03:55:54,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 03:55:54,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 03:55:54,028 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-26 03:55:54,029 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-26 03:55:54,029 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-26 03:55:54,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 03:55:54,029 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-26 03:55:54,030 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 03:55:54,030 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 03:55:54,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 03:55:54,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 03:55:54,031 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 03:55:54,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 03:55:54,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 03:55:54,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 03:55:54,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 03:55:54,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 03:55:54,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 03:55:54,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 03:55:54,033 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20a70402cc893fb2c7adec21ca8a267adc3c5cbb [2020-10-26 03:55:54,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 03:55:54,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 03:55:54,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 03:55:54,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 03:55:54,534 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 03:55:54,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_9.c [2020-10-26 03:55:54,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4e4a7beb/f3bb43595c7d4ace84d13f3f23346997/FLAGca53a5c39 [2020-10-26 03:55:55,312 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 03:55:55,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_9.c [2020-10-26 03:55:55,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4e4a7beb/f3bb43595c7d4ace84d13f3f23346997/FLAGca53a5c39 [2020-10-26 03:55:55,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4e4a7beb/f3bb43595c7d4ace84d13f3f23346997 [2020-10-26 03:55:55,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 03:55:55,672 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-26 03:55:55,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 03:55:55,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 03:55:55,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 03:55:55,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 03:55:55" (1/1) ... [2020-10-26 03:55:55,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af835f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:55, skipping insertion in model container [2020-10-26 03:55:55,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 03:55:55" (1/1) ... [2020-10-26 03:55:55,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 03:55:55,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 03:55:55,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 03:55:55,961 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 03:55:56,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 03:55:56,052 INFO L208 MainTranslator]: Completed translation [2020-10-26 03:55:56,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:56 WrapperNode [2020-10-26 03:55:56,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 03:55:56,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 03:55:56,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 03:55:56,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 03:55:56,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:56" (1/1) ... [2020-10-26 03:55:56,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:56" (1/1) ... [2020-10-26 03:55:56,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:56" (1/1) ... [2020-10-26 03:55:56,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:56" (1/1) ... [2020-10-26 03:55:56,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:56" (1/1) ... [2020-10-26 03:55:56,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:56" (1/1) ... [2020-10-26 03:55:56,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:56" (1/1) ... [2020-10-26 03:55:56,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 03:55:56,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 03:55:56,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 03:55:56,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 03:55:56,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:56" (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 03:55:56,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 03:55:56,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 03:55:56,273 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 03:55:56,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 03:55:56,274 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 03:55:56,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 03:55:56,275 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 03:55:56,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 03:55:56,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 03:55:56,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 03:55:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 03:55:56,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 03:55:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 03:55:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 03:55:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 03:55:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 03:55:57,026 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 03:55:57,027 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 03:55:57,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:55:57 BoogieIcfgContainer [2020-10-26 03:55:57,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 03:55:57,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 03:55:57,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 03:55:57,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 03:55:57,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 03:55:55" (1/3) ... [2020-10-26 03:55:57,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722a65ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 03:55:57, skipping insertion in model container [2020-10-26 03:55:57,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:55:56" (2/3) ... [2020-10-26 03:55:57,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722a65ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 03:55:57, skipping insertion in model container [2020-10-26 03:55:57,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:55:57" (3/3) ... [2020-10-26 03:55:57,043 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-10-26 03:55:57,056 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 03:55:57,062 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-26 03:55:57,073 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-26 03:55:57,098 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 03:55:57,099 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-26 03:55:57,099 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 03:55:57,099 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 03:55:57,100 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 03:55:57,100 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 03:55:57,100 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 03:55:57,100 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 03:55:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-26 03:55:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-26 03:55:57,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:57,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:57,130 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:57,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:57,137 INFO L82 PathProgramCache]: Analyzing trace with hash -693527066, now seen corresponding path program 1 times [2020-10-26 03:55:57,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:57,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716131294] [2020-10-26 03:55:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:57,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:57,487 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 03:55:57,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716131294] [2020-10-26 03:55:57,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:57,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 03:55:57,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157096846] [2020-10-26 03:55:57,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 03:55:57,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:57,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 03:55:57,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 03:55:57,525 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-10-26 03:55:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:57,572 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2020-10-26 03:55:57,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 03:55:57,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-26 03:55:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:57,586 INFO L225 Difference]: With dead ends: 43 [2020-10-26 03:55:57,587 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 03:55:57,589 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 03:55:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 03:55:57,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-26 03:55:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 03:55:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2020-10-26 03:55:57,633 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 9 [2020-10-26 03:55:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:57,634 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2020-10-26 03:55:57,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 03:55:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2020-10-26 03:55:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 03:55:57,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:57,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:57,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 03:55:57,636 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:57,637 INFO L82 PathProgramCache]: Analyzing trace with hash 838313058, now seen corresponding path program 1 times [2020-10-26 03:55:57,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:57,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314549355] [2020-10-26 03:55:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:57,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:57,788 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 03:55:57,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314549355] [2020-10-26 03:55:57,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:57,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:57,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418091781] [2020-10-26 03:55:57,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:57,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:57,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:57,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:57,793 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand 4 states. [2020-10-26 03:55:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:58,052 INFO L93 Difference]: Finished difference Result 67 states and 118 transitions. [2020-10-26 03:55:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:58,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-26 03:55:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:58,056 INFO L225 Difference]: With dead ends: 67 [2020-10-26 03:55:58,056 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 03:55:58,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 03:55:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 03:55:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2020-10-26 03:55:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 03:55:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 83 transitions. [2020-10-26 03:55:58,069 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 83 transitions. Word has length 21 [2020-10-26 03:55:58,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:58,069 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 83 transitions. [2020-10-26 03:55:58,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 83 transitions. [2020-10-26 03:55:58,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 03:55:58,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:58,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:58,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 03:55:58,072 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash 251507044, now seen corresponding path program 1 times [2020-10-26 03:55:58,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:58,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330496675] [2020-10-26 03:55:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:58,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:58,192 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 03:55:58,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330496675] [2020-10-26 03:55:58,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:58,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:58,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592528993] [2020-10-26 03:55:58,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:58,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:58,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:58,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:58,196 INFO L87 Difference]: Start difference. First operand 48 states and 83 transitions. Second operand 4 states. [2020-10-26 03:55:58,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:58,410 INFO L93 Difference]: Finished difference Result 67 states and 116 transitions. [2020-10-26 03:55:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:58,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-26 03:55:58,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:58,413 INFO L225 Difference]: With dead ends: 67 [2020-10-26 03:55:58,413 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 03:55:58,414 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 03:55:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 03:55:58,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-26 03:55:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 03:55:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 115 transitions. [2020-10-26 03:55:58,424 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 115 transitions. Word has length 21 [2020-10-26 03:55:58,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:58,424 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 115 transitions. [2020-10-26 03:55:58,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:58,425 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 115 transitions. [2020-10-26 03:55:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 03:55:58,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:58,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:58,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 03:55:58,427 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:58,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:58,428 INFO L82 PathProgramCache]: Analyzing trace with hash 224518530, now seen corresponding path program 1 times [2020-10-26 03:55:58,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:58,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529136252] [2020-10-26 03:55:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:58,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:58,522 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 03:55:58,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529136252] [2020-10-26 03:55:58,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:58,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:58,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837699563] [2020-10-26 03:55:58,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:58,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:58,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:58,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:58,526 INFO L87 Difference]: Start difference. First operand 66 states and 115 transitions. Second operand 4 states. [2020-10-26 03:55:58,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:58,713 INFO L93 Difference]: Finished difference Result 70 states and 118 transitions. [2020-10-26 03:55:58,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:58,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-26 03:55:58,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:58,716 INFO L225 Difference]: With dead ends: 70 [2020-10-26 03:55:58,716 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 03:55:58,716 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 03:55:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 03:55:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 03:55:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 03:55:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 117 transitions. [2020-10-26 03:55:58,724 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 117 transitions. Word has length 22 [2020-10-26 03:55:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:58,725 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 117 transitions. [2020-10-26 03:55:58,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 117 transitions. [2020-10-26 03:55:58,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 03:55:58,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:58,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:58,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 03:55:58,727 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:58,728 INFO L82 PathProgramCache]: Analyzing trace with hash -786598720, now seen corresponding path program 1 times [2020-10-26 03:55:58,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:58,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037344151] [2020-10-26 03:55:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:58,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:58,807 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 03:55:58,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037344151] [2020-10-26 03:55:58,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:58,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:58,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833922921] [2020-10-26 03:55:58,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:58,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:58,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:58,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:58,810 INFO L87 Difference]: Start difference. First operand 69 states and 117 transitions. Second operand 4 states. [2020-10-26 03:55:59,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:59,011 INFO L93 Difference]: Finished difference Result 125 states and 215 transitions. [2020-10-26 03:55:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:59,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-26 03:55:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:59,014 INFO L225 Difference]: With dead ends: 125 [2020-10-26 03:55:59,014 INFO L226 Difference]: Without dead ends: 125 [2020-10-26 03:55:59,015 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 03:55:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-26 03:55:59,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-26 03:55:59,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-26 03:55:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 214 transitions. [2020-10-26 03:55:59,026 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 214 transitions. Word has length 22 [2020-10-26 03:55:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:59,027 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 214 transitions. [2020-10-26 03:55:59,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 214 transitions. [2020-10-26 03:55:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 03:55:59,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:59,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:59,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 03:55:59,029 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:59,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:59,030 INFO L82 PathProgramCache]: Analyzing trace with hash -199792706, now seen corresponding path program 1 times [2020-10-26 03:55:59,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:59,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262325486] [2020-10-26 03:55:59,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:59,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:59,126 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 03:55:59,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262325486] [2020-10-26 03:55:59,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:59,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:59,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709200261] [2020-10-26 03:55:59,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:59,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:59,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:59,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:59,136 INFO L87 Difference]: Start difference. First operand 124 states and 214 transitions. Second operand 4 states. [2020-10-26 03:55:59,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:59,304 INFO L93 Difference]: Finished difference Result 157 states and 273 transitions. [2020-10-26 03:55:59,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:59,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-26 03:55:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:59,307 INFO L225 Difference]: With dead ends: 157 [2020-10-26 03:55:59,307 INFO L226 Difference]: Without dead ends: 157 [2020-10-26 03:55:59,307 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 03:55:59,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-26 03:55:59,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 124. [2020-10-26 03:55:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-26 03:55:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 212 transitions. [2020-10-26 03:55:59,318 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 212 transitions. Word has length 22 [2020-10-26 03:55:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:59,318 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 212 transitions. [2020-10-26 03:55:59,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 212 transitions. [2020-10-26 03:55:59,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 03:55:59,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:59,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:59,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 03:55:59,321 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:59,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1391871535, now seen corresponding path program 1 times [2020-10-26 03:55:59,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:59,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014464162] [2020-10-26 03:55:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:59,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:59,448 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 03:55:59,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014464162] [2020-10-26 03:55:59,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:59,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:59,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339263215] [2020-10-26 03:55:59,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:59,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:59,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:59,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:59,455 INFO L87 Difference]: Start difference. First operand 124 states and 212 transitions. Second operand 4 states. [2020-10-26 03:55:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:55:59,642 INFO L93 Difference]: Finished difference Result 225 states and 391 transitions. [2020-10-26 03:55:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:55:59,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-26 03:55:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:55:59,644 INFO L225 Difference]: With dead ends: 225 [2020-10-26 03:55:59,644 INFO L226 Difference]: Without dead ends: 225 [2020-10-26 03:55:59,645 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 03:55:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-26 03:55:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2020-10-26 03:55:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-26 03:55:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 286 transitions. [2020-10-26 03:55:59,668 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 286 transitions. Word has length 23 [2020-10-26 03:55:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:55:59,669 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 286 transitions. [2020-10-26 03:55:59,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:55:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 286 transitions. [2020-10-26 03:55:59,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 03:55:59,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:55:59,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:55:59,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 03:55:59,676 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:55:59,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:55:59,679 INFO L82 PathProgramCache]: Analyzing trace with hash 805065521, now seen corresponding path program 1 times [2020-10-26 03:55:59,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:55:59,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797446996] [2020-10-26 03:55:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:55:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:59,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:55:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:55:59,806 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 03:55:59,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797446996] [2020-10-26 03:55:59,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:55:59,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:55:59,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466827729] [2020-10-26 03:55:59,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:55:59,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:55:59,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:55:59,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:55:59,810 INFO L87 Difference]: Start difference. First operand 168 states and 286 transitions. Second operand 4 states. [2020-10-26 03:56:00,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:00,024 INFO L93 Difference]: Finished difference Result 233 states and 393 transitions. [2020-10-26 03:56:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:00,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-26 03:56:00,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:00,027 INFO L225 Difference]: With dead ends: 233 [2020-10-26 03:56:00,028 INFO L226 Difference]: Without dead ends: 233 [2020-10-26 03:56:00,028 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 03:56:00,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-26 03:56:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-26 03:56:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-26 03:56:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 392 transitions. [2020-10-26 03:56:00,051 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 392 transitions. Word has length 23 [2020-10-26 03:56:00,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:00,053 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 392 transitions. [2020-10-26 03:56:00,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:00,053 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 392 transitions. [2020-10-26 03:56:00,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 03:56:00,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:00,058 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 03:56:00,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 03:56:00,059 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:00,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:00,060 INFO L82 PathProgramCache]: Analyzing trace with hash 204983275, now seen corresponding path program 1 times [2020-10-26 03:56:00,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:00,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122618292] [2020-10-26 03:56:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:00,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:00,148 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 03:56:00,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122618292] [2020-10-26 03:56:00,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:00,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:00,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911763364] [2020-10-26 03:56:00,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:00,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:00,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:00,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:00,150 INFO L87 Difference]: Start difference. First operand 232 states and 392 transitions. Second operand 4 states. [2020-10-26 03:56:00,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:00,299 INFO L93 Difference]: Finished difference Result 239 states and 397 transitions. [2020-10-26 03:56:00,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:00,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-26 03:56:00,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:00,302 INFO L225 Difference]: With dead ends: 239 [2020-10-26 03:56:00,302 INFO L226 Difference]: Without dead ends: 239 [2020-10-26 03:56:00,302 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 03:56:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-26 03:56:00,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2020-10-26 03:56:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-26 03:56:00,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 396 transitions. [2020-10-26 03:56:00,310 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 396 transitions. Word has length 24 [2020-10-26 03:56:00,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:00,311 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 396 transitions. [2020-10-26 03:56:00,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:00,311 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 396 transitions. [2020-10-26 03:56:00,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 03:56:00,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:00,312 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 03:56:00,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 03:56:00,313 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:00,313 INFO L82 PathProgramCache]: Analyzing trace with hash -806133975, now seen corresponding path program 1 times [2020-10-26 03:56:00,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:00,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657284934] [2020-10-26 03:56:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:00,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:00,386 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 03:56:00,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657284934] [2020-10-26 03:56:00,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:00,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:00,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450205100] [2020-10-26 03:56:00,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:00,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:00,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:00,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:00,389 INFO L87 Difference]: Start difference. First operand 238 states and 396 transitions. Second operand 4 states. [2020-10-26 03:56:00,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:00,571 INFO L93 Difference]: Finished difference Result 427 states and 717 transitions. [2020-10-26 03:56:00,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:00,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-26 03:56:00,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:00,578 INFO L225 Difference]: With dead ends: 427 [2020-10-26 03:56:00,580 INFO L226 Difference]: Without dead ends: 427 [2020-10-26 03:56:00,580 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 03:56:00,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-26 03:56:00,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 330. [2020-10-26 03:56:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-26 03:56:00,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 540 transitions. [2020-10-26 03:56:00,595 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 540 transitions. Word has length 24 [2020-10-26 03:56:00,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:00,598 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 540 transitions. [2020-10-26 03:56:00,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 540 transitions. [2020-10-26 03:56:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 03:56:00,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:00,604 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 03:56:00,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 03:56:00,605 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:00,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1392939989, now seen corresponding path program 1 times [2020-10-26 03:56:00,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:00,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406569089] [2020-10-26 03:56:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:00,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:00,693 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 03:56:00,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406569089] [2020-10-26 03:56:00,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:00,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:00,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203017252] [2020-10-26 03:56:00,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:00,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:00,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:00,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:00,700 INFO L87 Difference]: Start difference. First operand 330 states and 540 transitions. Second operand 4 states. [2020-10-26 03:56:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:00,889 INFO L93 Difference]: Finished difference Result 451 states and 729 transitions. [2020-10-26 03:56:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:00,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-26 03:56:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:00,893 INFO L225 Difference]: With dead ends: 451 [2020-10-26 03:56:00,894 INFO L226 Difference]: Without dead ends: 451 [2020-10-26 03:56:00,894 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 03:56:00,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-26 03:56:00,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 450. [2020-10-26 03:56:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-26 03:56:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 728 transitions. [2020-10-26 03:56:00,908 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 728 transitions. Word has length 24 [2020-10-26 03:56:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:00,909 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 728 transitions. [2020-10-26 03:56:00,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 728 transitions. [2020-10-26 03:56:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 03:56:00,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:00,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:56:00,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 03:56:00,911 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:00,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:00,912 INFO L82 PathProgramCache]: Analyzing trace with hash 786299772, now seen corresponding path program 1 times [2020-10-26 03:56:00,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:00,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139733433] [2020-10-26 03:56:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:00,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:00,969 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 03:56:00,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139733433] [2020-10-26 03:56:00,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:00,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:00,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319260576] [2020-10-26 03:56:00,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:00,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:00,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:00,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:00,972 INFO L87 Difference]: Start difference. First operand 450 states and 728 transitions. Second operand 4 states. [2020-10-26 03:56:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:01,142 INFO L93 Difference]: Finished difference Result 459 states and 729 transitions. [2020-10-26 03:56:01,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:01,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-26 03:56:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:01,146 INFO L225 Difference]: With dead ends: 459 [2020-10-26 03:56:01,147 INFO L226 Difference]: Without dead ends: 459 [2020-10-26 03:56:01,147 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 03:56:01,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-26 03:56:01,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 458. [2020-10-26 03:56:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-26 03:56:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 728 transitions. [2020-10-26 03:56:01,163 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 728 transitions. Word has length 25 [2020-10-26 03:56:01,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:01,163 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 728 transitions. [2020-10-26 03:56:01,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:01,164 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 728 transitions. [2020-10-26 03:56:01,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 03:56:01,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:01,165 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 03:56:01,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 03:56:01,166 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:01,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:01,167 INFO L82 PathProgramCache]: Analyzing trace with hash -224817478, now seen corresponding path program 1 times [2020-10-26 03:56:01,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:01,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554227123] [2020-10-26 03:56:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:01,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:01,242 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 03:56:01,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554227123] [2020-10-26 03:56:01,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:01,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:01,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604767733] [2020-10-26 03:56:01,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:01,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:01,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:01,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:01,250 INFO L87 Difference]: Start difference. First operand 458 states and 728 transitions. Second operand 4 states. [2020-10-26 03:56:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:01,423 INFO L93 Difference]: Finished difference Result 811 states and 1297 transitions. [2020-10-26 03:56:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:01,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-26 03:56:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:01,430 INFO L225 Difference]: With dead ends: 811 [2020-10-26 03:56:01,430 INFO L226 Difference]: Without dead ends: 811 [2020-10-26 03:56:01,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 03:56:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-10-26 03:56:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 650. [2020-10-26 03:56:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2020-10-26 03:56:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1008 transitions. [2020-10-26 03:56:01,456 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1008 transitions. Word has length 25 [2020-10-26 03:56:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:01,457 INFO L481 AbstractCegarLoop]: Abstraction has 650 states and 1008 transitions. [2020-10-26 03:56:01,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1008 transitions. [2020-10-26 03:56:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 03:56:01,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:01,459 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 03:56:01,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 03:56:01,460 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:01,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:01,460 INFO L82 PathProgramCache]: Analyzing trace with hash -811623492, now seen corresponding path program 1 times [2020-10-26 03:56:01,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:01,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78656228] [2020-10-26 03:56:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:01,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:01,523 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 03:56:01,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78656228] [2020-10-26 03:56:01,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:01,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:01,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814364515] [2020-10-26 03:56:01,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:01,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:01,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:01,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:01,526 INFO L87 Difference]: Start difference. First operand 650 states and 1008 transitions. Second operand 4 states. [2020-10-26 03:56:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:01,814 INFO L93 Difference]: Finished difference Result 875 states and 1337 transitions. [2020-10-26 03:56:01,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:01,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-26 03:56:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:01,819 INFO L225 Difference]: With dead ends: 875 [2020-10-26 03:56:01,820 INFO L226 Difference]: Without dead ends: 875 [2020-10-26 03:56:01,820 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 03:56:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2020-10-26 03:56:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 874. [2020-10-26 03:56:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-26 03:56:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1336 transitions. [2020-10-26 03:56:01,848 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1336 transitions. Word has length 25 [2020-10-26 03:56:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:01,848 INFO L481 AbstractCegarLoop]: Abstraction has 874 states and 1336 transitions. [2020-10-26 03:56:01,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1336 transitions. [2020-10-26 03:56:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 03:56:01,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:01,851 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 03:56:01,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 03:56:01,851 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:01,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1627252566, now seen corresponding path program 1 times [2020-10-26 03:56:01,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:01,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089391548] [2020-10-26 03:56:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:01,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:01,926 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 03:56:01,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089391548] [2020-10-26 03:56:01,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:01,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:01,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112770716] [2020-10-26 03:56:01,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:01,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:01,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:01,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:01,930 INFO L87 Difference]: Start difference. First operand 874 states and 1336 transitions. Second operand 4 states. [2020-10-26 03:56:02,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:02,113 INFO L93 Difference]: Finished difference Result 891 states and 1337 transitions. [2020-10-26 03:56:02,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:02,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-26 03:56:02,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:02,120 INFO L225 Difference]: With dead ends: 891 [2020-10-26 03:56:02,120 INFO L226 Difference]: Without dead ends: 891 [2020-10-26 03:56:02,121 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 03:56:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-10-26 03:56:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 890. [2020-10-26 03:56:02,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2020-10-26 03:56:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1336 transitions. [2020-10-26 03:56:02,155 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1336 transitions. Word has length 26 [2020-10-26 03:56:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:02,155 INFO L481 AbstractCegarLoop]: Abstraction has 890 states and 1336 transitions. [2020-10-26 03:56:02,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1336 transitions. [2020-10-26 03:56:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 03:56:02,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:02,158 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 03:56:02,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 03:56:02,158 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:02,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:02,159 INFO L82 PathProgramCache]: Analyzing trace with hash 616135316, now seen corresponding path program 1 times [2020-10-26 03:56:02,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:02,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909134389] [2020-10-26 03:56:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:02,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:02,223 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 03:56:02,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909134389] [2020-10-26 03:56:02,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:02,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:02,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629496652] [2020-10-26 03:56:02,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:02,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:02,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:02,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:02,226 INFO L87 Difference]: Start difference. First operand 890 states and 1336 transitions. Second operand 4 states. [2020-10-26 03:56:02,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:02,400 INFO L93 Difference]: Finished difference Result 1547 states and 2329 transitions. [2020-10-26 03:56:02,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:02,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-26 03:56:02,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:02,410 INFO L225 Difference]: With dead ends: 1547 [2020-10-26 03:56:02,410 INFO L226 Difference]: Without dead ends: 1547 [2020-10-26 03:56:02,411 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 03:56:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-10-26 03:56:02,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1290. [2020-10-26 03:56:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1290 states. [2020-10-26 03:56:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1880 transitions. [2020-10-26 03:56:02,450 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1880 transitions. Word has length 26 [2020-10-26 03:56:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:02,450 INFO L481 AbstractCegarLoop]: Abstraction has 1290 states and 1880 transitions. [2020-10-26 03:56:02,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1880 transitions. [2020-10-26 03:56:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 03:56:02,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:02,454 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 03:56:02,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 03:56:02,454 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:02,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:02,455 INFO L82 PathProgramCache]: Analyzing trace with hash 29329302, now seen corresponding path program 1 times [2020-10-26 03:56:02,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:02,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10617271] [2020-10-26 03:56:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:02,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:02,518 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 03:56:02,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10617271] [2020-10-26 03:56:02,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:02,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:02,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265230388] [2020-10-26 03:56:02,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:02,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:02,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:02,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:02,523 INFO L87 Difference]: Start difference. First operand 1290 states and 1880 transitions. Second operand 4 states. [2020-10-26 03:56:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:02,700 INFO L93 Difference]: Finished difference Result 1707 states and 2441 transitions. [2020-10-26 03:56:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:02,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-26 03:56:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:02,708 INFO L225 Difference]: With dead ends: 1707 [2020-10-26 03:56:02,709 INFO L226 Difference]: Without dead ends: 1707 [2020-10-26 03:56:02,709 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 03:56:02,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-10-26 03:56:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1706. [2020-10-26 03:56:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1706 states. [2020-10-26 03:56:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2440 transitions. [2020-10-26 03:56:02,764 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2440 transitions. Word has length 26 [2020-10-26 03:56:02,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:02,765 INFO L481 AbstractCegarLoop]: Abstraction has 1706 states and 2440 transitions. [2020-10-26 03:56:02,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2440 transitions. [2020-10-26 03:56:02,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 03:56:02,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:02,768 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 03:56:02,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 03:56:02,769 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:02,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:02,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1926995975, now seen corresponding path program 1 times [2020-10-26 03:56:02,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:02,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439235166] [2020-10-26 03:56:02,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:02,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:02,827 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 03:56:02,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439235166] [2020-10-26 03:56:02,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:02,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:02,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329324126] [2020-10-26 03:56:02,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:02,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:02,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:02,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:02,830 INFO L87 Difference]: Start difference. First operand 1706 states and 2440 transitions. Second operand 4 states. [2020-10-26 03:56:02,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:02,997 INFO L93 Difference]: Finished difference Result 1739 states and 2441 transitions. [2020-10-26 03:56:02,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:02,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-26 03:56:02,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:03,009 INFO L225 Difference]: With dead ends: 1739 [2020-10-26 03:56:03,009 INFO L226 Difference]: Without dead ends: 1739 [2020-10-26 03:56:03,010 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 03:56:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2020-10-26 03:56:03,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1738. [2020-10-26 03:56:03,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2020-10-26 03:56:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2440 transitions. [2020-10-26 03:56:03,062 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2440 transitions. Word has length 27 [2020-10-26 03:56:03,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:03,062 INFO L481 AbstractCegarLoop]: Abstraction has 1738 states and 2440 transitions. [2020-10-26 03:56:03,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2440 transitions. [2020-10-26 03:56:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 03:56:03,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:03,066 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 03:56:03,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 03:56:03,066 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:03,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:03,067 INFO L82 PathProgramCache]: Analyzing trace with hash 915878725, now seen corresponding path program 1 times [2020-10-26 03:56:03,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:03,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059180124] [2020-10-26 03:56:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:03,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:03,121 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 03:56:03,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059180124] [2020-10-26 03:56:03,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:03,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:03,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619643908] [2020-10-26 03:56:03,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:03,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:03,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:03,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:03,124 INFO L87 Difference]: Start difference. First operand 1738 states and 2440 transitions. Second operand 4 states. [2020-10-26 03:56:03,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:03,280 INFO L93 Difference]: Finished difference Result 2955 states and 4137 transitions. [2020-10-26 03:56:03,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:03,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-26 03:56:03,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:03,296 INFO L225 Difference]: With dead ends: 2955 [2020-10-26 03:56:03,296 INFO L226 Difference]: Without dead ends: 2955 [2020-10-26 03:56:03,297 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 03:56:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2020-10-26 03:56:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2570. [2020-10-26 03:56:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2570 states. [2020-10-26 03:56:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 3496 transitions. [2020-10-26 03:56:03,375 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 3496 transitions. Word has length 27 [2020-10-26 03:56:03,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:03,376 INFO L481 AbstractCegarLoop]: Abstraction has 2570 states and 3496 transitions. [2020-10-26 03:56:03,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 3496 transitions. [2020-10-26 03:56:03,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 03:56:03,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:03,381 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 03:56:03,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 03:56:03,381 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:03,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:03,382 INFO L82 PathProgramCache]: Analyzing trace with hash 329072711, now seen corresponding path program 1 times [2020-10-26 03:56:03,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:03,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465264500] [2020-10-26 03:56:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:03,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:03,428 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 03:56:03,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465264500] [2020-10-26 03:56:03,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:03,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:03,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363229819] [2020-10-26 03:56:03,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:03,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:03,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:03,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:03,430 INFO L87 Difference]: Start difference. First operand 2570 states and 3496 transitions. Second operand 4 states. [2020-10-26 03:56:03,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:03,582 INFO L93 Difference]: Finished difference Result 3339 states and 4425 transitions. [2020-10-26 03:56:03,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:03,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-26 03:56:03,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:03,598 INFO L225 Difference]: With dead ends: 3339 [2020-10-26 03:56:03,598 INFO L226 Difference]: Without dead ends: 3339 [2020-10-26 03:56:03,598 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 03:56:03,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2020-10-26 03:56:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3338. [2020-10-26 03:56:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3338 states. [2020-10-26 03:56:03,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4424 transitions. [2020-10-26 03:56:03,702 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4424 transitions. Word has length 27 [2020-10-26 03:56:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:03,703 INFO L481 AbstractCegarLoop]: Abstraction has 3338 states and 4424 transitions. [2020-10-26 03:56:03,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4424 transitions. [2020-10-26 03:56:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 03:56:03,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:03,738 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 03:56:03,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 03:56:03,740 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:03,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1665849663, now seen corresponding path program 1 times [2020-10-26 03:56:03,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:03,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194874203] [2020-10-26 03:56:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:03,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:03,823 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 03:56:03,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194874203] [2020-10-26 03:56:03,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:03,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:03,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634307456] [2020-10-26 03:56:03,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:03,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:03,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:03,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:03,827 INFO L87 Difference]: Start difference. First operand 3338 states and 4424 transitions. Second operand 4 states. [2020-10-26 03:56:03,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:03,972 INFO L93 Difference]: Finished difference Result 3403 states and 4425 transitions. [2020-10-26 03:56:03,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:03,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-26 03:56:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:03,989 INFO L225 Difference]: With dead ends: 3403 [2020-10-26 03:56:03,989 INFO L226 Difference]: Without dead ends: 3403 [2020-10-26 03:56:03,990 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 03:56:03,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2020-10-26 03:56:04,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3402. [2020-10-26 03:56:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3402 states. [2020-10-26 03:56:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 4424 transitions. [2020-10-26 03:56:04,080 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 4424 transitions. Word has length 28 [2020-10-26 03:56:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:04,080 INFO L481 AbstractCegarLoop]: Abstraction has 3402 states and 4424 transitions. [2020-10-26 03:56:04,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 4424 transitions. [2020-10-26 03:56:04,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 03:56:04,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:04,085 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 03:56:04,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 03:56:04,086 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:04,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:04,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1618000383, now seen corresponding path program 1 times [2020-10-26 03:56:04,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:04,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540221333] [2020-10-26 03:56:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:04,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:04,175 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 03:56:04,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540221333] [2020-10-26 03:56:04,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:04,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:04,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094847106] [2020-10-26 03:56:04,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:04,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:04,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:04,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:04,178 INFO L87 Difference]: Start difference. First operand 3402 states and 4424 transitions. Second operand 4 states. [2020-10-26 03:56:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:04,328 INFO L93 Difference]: Finished difference Result 5643 states and 7241 transitions. [2020-10-26 03:56:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:04,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-26 03:56:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:04,357 INFO L225 Difference]: With dead ends: 5643 [2020-10-26 03:56:04,358 INFO L226 Difference]: Without dead ends: 5643 [2020-10-26 03:56:04,358 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 03:56:04,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2020-10-26 03:56:04,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5130. [2020-10-26 03:56:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5130 states. [2020-10-26 03:56:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 6472 transitions. [2020-10-26 03:56:04,525 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 6472 transitions. Word has length 28 [2020-10-26 03:56:04,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:04,526 INFO L481 AbstractCegarLoop]: Abstraction has 5130 states and 6472 transitions. [2020-10-26 03:56:04,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 6472 transitions. [2020-10-26 03:56:04,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 03:56:04,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:04,536 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 03:56:04,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 03:56:04,537 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:04,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1031194369, now seen corresponding path program 1 times [2020-10-26 03:56:04,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:04,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620108739] [2020-10-26 03:56:04,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:04,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:04,591 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 03:56:04,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620108739] [2020-10-26 03:56:04,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:04,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:04,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860303003] [2020-10-26 03:56:04,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:04,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:04,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:04,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:04,594 INFO L87 Difference]: Start difference. First operand 5130 states and 6472 transitions. Second operand 4 states. [2020-10-26 03:56:04,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:04,783 INFO L93 Difference]: Finished difference Result 6539 states and 7945 transitions. [2020-10-26 03:56:04,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:04,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-26 03:56:04,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:04,803 INFO L225 Difference]: With dead ends: 6539 [2020-10-26 03:56:04,804 INFO L226 Difference]: Without dead ends: 6539 [2020-10-26 03:56:04,804 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 03:56:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2020-10-26 03:56:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6538. [2020-10-26 03:56:05,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6538 states. [2020-10-26 03:56:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6538 states to 6538 states and 7944 transitions. [2020-10-26 03:56:05,037 INFO L78 Accepts]: Start accepts. Automaton has 6538 states and 7944 transitions. Word has length 28 [2020-10-26 03:56:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:05,038 INFO L481 AbstractCegarLoop]: Abstraction has 6538 states and 7944 transitions. [2020-10-26 03:56:05,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 6538 states and 7944 transitions. [2020-10-26 03:56:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 03:56:05,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:05,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:56:05,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 03:56:05,049 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:05,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:05,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1374904174, now seen corresponding path program 1 times [2020-10-26 03:56:05,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:05,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146857962] [2020-10-26 03:56:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:05,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:05,108 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 03:56:05,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146857962] [2020-10-26 03:56:05,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:05,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:05,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889251327] [2020-10-26 03:56:05,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:05,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:05,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:05,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:05,111 INFO L87 Difference]: Start difference. First operand 6538 states and 7944 transitions. Second operand 4 states. [2020-10-26 03:56:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:05,273 INFO L93 Difference]: Finished difference Result 6667 states and 7945 transitions. [2020-10-26 03:56:05,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:05,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-26 03:56:05,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:05,289 INFO L225 Difference]: With dead ends: 6667 [2020-10-26 03:56:05,289 INFO L226 Difference]: Without dead ends: 6667 [2020-10-26 03:56:05,290 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 03:56:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2020-10-26 03:56:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6666. [2020-10-26 03:56:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6666 states. [2020-10-26 03:56:05,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 7944 transitions. [2020-10-26 03:56:05,484 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 7944 transitions. Word has length 29 [2020-10-26 03:56:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:05,484 INFO L481 AbstractCegarLoop]: Abstraction has 6666 states and 7944 transitions. [2020-10-26 03:56:05,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:05,484 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 7944 transitions. [2020-10-26 03:56:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 03:56:05,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:05,494 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 03:56:05,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 03:56:05,495 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:05,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:05,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1908945872, now seen corresponding path program 1 times [2020-10-26 03:56:05,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:05,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919203067] [2020-10-26 03:56:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:05,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:05,548 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 03:56:05,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919203067] [2020-10-26 03:56:05,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:05,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:05,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466065801] [2020-10-26 03:56:05,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:05,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:05,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:05,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:05,551 INFO L87 Difference]: Start difference. First operand 6666 states and 7944 transitions. Second operand 4 states. [2020-10-26 03:56:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:05,716 INFO L93 Difference]: Finished difference Result 10762 states and 12424 transitions. [2020-10-26 03:56:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:05,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-26 03:56:05,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:05,739 INFO L225 Difference]: With dead ends: 10762 [2020-10-26 03:56:05,740 INFO L226 Difference]: Without dead ends: 10762 [2020-10-26 03:56:05,740 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 03:56:05,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2020-10-26 03:56:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 10250. [2020-10-26 03:56:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10250 states. [2020-10-26 03:56:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10250 states to 10250 states and 11912 transitions. [2020-10-26 03:56:05,976 INFO L78 Accepts]: Start accepts. Automaton has 10250 states and 11912 transitions. Word has length 29 [2020-10-26 03:56:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:05,977 INFO L481 AbstractCegarLoop]: Abstraction has 10250 states and 11912 transitions. [2020-10-26 03:56:05,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 10250 states and 11912 transitions. [2020-10-26 03:56:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 03:56:05,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:05,995 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 03:56:05,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 03:56:05,995 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:56:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1322139858, now seen corresponding path program 1 times [2020-10-26 03:56:05,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:05,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55710791] [2020-10-26 03:56:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:06,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:06,047 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 03:56:06,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55710791] [2020-10-26 03:56:06,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:06,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:56:06,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833113371] [2020-10-26 03:56:06,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:06,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:06,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:06,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:06,050 INFO L87 Difference]: Start difference. First operand 10250 states and 11912 transitions. Second operand 4 states. [2020-10-26 03:56:06,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:06,285 INFO L93 Difference]: Finished difference Result 12807 states and 14086 transitions. [2020-10-26 03:56:06,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:06,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-26 03:56:06,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:06,287 INFO L225 Difference]: With dead ends: 12807 [2020-10-26 03:56:06,287 INFO L226 Difference]: Without dead ends: 0 [2020-10-26 03:56:06,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 03:56:06,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-26 03:56:06,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-26 03:56:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-26 03:56:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-26 03:56:06,288 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-26 03:56:06,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:06,289 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 03:56:06,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-26 03:56:06,289 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-26 03:56:06,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 03:56:06,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 03:56:06 BoogieIcfgContainer [2020-10-26 03:56:06,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 03:56:06,297 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 03:56:06,297 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 03:56:06,297 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 03:56:06,298 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:55:57" (3/4) ... [2020-10-26 03:56:06,302 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-26 03:56:06,310 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-26 03:56:06,310 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-26 03:56:06,311 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-26 03:56:06,318 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-26 03:56:06,318 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-26 03:56:06,319 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-26 03:56:06,319 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-26 03:56:06,376 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 03:56:06,377 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 03:56:06,379 INFO L168 Benchmark]: Toolchain (without parser) took 10711.20 ms. Allocated memory was 46.1 MB in the beginning and 406.8 MB in the end (delta: 360.7 MB). Free memory was 22.8 MB in the beginning and 284.2 MB in the end (delta: -261.4 MB). Peak memory consumption was 101.7 MB. Max. memory is 16.1 GB. [2020-10-26 03:56:06,380 INFO L168 Benchmark]: CDTParser took 0.64 ms. Allocated memory is still 37.7 MB. Free memory was 23.8 MB in the beginning and 23.8 MB in the end (delta: 31.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 03:56:06,380 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.45 ms. Allocated memory is still 46.1 MB. Free memory was 22.2 MB in the beginning and 23.3 MB in the end (delta: -1.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-26 03:56:06,381 INFO L168 Benchmark]: Boogie Preprocessor took 96.02 ms. Allocated memory is still 46.1 MB. Free memory was 23.3 MB in the beginning and 21.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 03:56:06,381 INFO L168 Benchmark]: RCFGBuilder took 878.67 ms. Allocated memory is still 46.1 MB. Free memory was 21.6 MB in the beginning and 23.6 MB in the end (delta: -2.1 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2020-10-26 03:56:06,382 INFO L168 Benchmark]: TraceAbstraction took 9262.99 ms. Allocated memory was 46.1 MB in the beginning and 406.8 MB in the end (delta: 360.7 MB). Free memory was 23.2 MB in the beginning and 288.4 MB in the end (delta: -265.2 MB). Peak memory consumption was 94.7 MB. Max. memory is 16.1 GB. [2020-10-26 03:56:06,382 INFO L168 Benchmark]: Witness Printer took 80.23 ms. Allocated memory is still 406.8 MB. Free memory was 288.4 MB in the beginning and 284.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-26 03:56:06,384 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64 ms. Allocated memory is still 37.7 MB. Free memory was 23.8 MB in the beginning and 23.8 MB in the end (delta: 31.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 380.45 ms. Allocated memory is still 46.1 MB. Free memory was 22.2 MB in the beginning and 23.3 MB in the end (delta: -1.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 96.02 ms. Allocated memory is still 46.1 MB. Free memory was 23.3 MB in the beginning and 21.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 878.67 ms. Allocated memory is still 46.1 MB. Free memory was 21.6 MB in the beginning and 23.6 MB in the end (delta: -2.1 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9262.99 ms. Allocated memory was 46.1 MB in the beginning and 406.8 MB in the end (delta: 360.7 MB). Free memory was 23.2 MB in the beginning and 288.4 MB in the end (delta: -265.2 MB). Peak memory consumption was 94.7 MB. Max. memory is 16.1 GB. * Witness Printer took 80.23 ms. Allocated memory is still 406.8 MB. Free memory was 288.4 MB in the beginning and 284.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 47 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.1s, OverallIterations: 26, TraceHistogramMax: 1, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2026 SDtfs, 2884 SDslu, 193 SDs, 0 SdLazy, 1413 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 179 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10250occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 26 MinimizatonAttempts, 2049 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 640 NumberOfCodeBlocks, 640 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 614 ConstructedInterpolants, 0 QuantifiedInterpolants, 46238 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 26 InterpolantComputations, 26 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...