./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6423b7e5fbcc52c08e52aff49c79db620dd407c4 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:21:15,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:21:15,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:21:15,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:21:15,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:21:15,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:21:15,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:21:15,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:21:15,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:21:15,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:21:15,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:21:15,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:21:15,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:21:15,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:21:15,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:21:15,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:21:15,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:21:15,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:21:15,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:21:15,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:21:15,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:21:15,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:21:15,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:21:15,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:21:15,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:21:15,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:21:15,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:21:15,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:21:15,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:21:15,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:21:15,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:21:15,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:21:15,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:21:15,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:21:15,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:21:15,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:21:15,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:21:15,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:21:15,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:21:15,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:21:15,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:21:15,927 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:21:15,983 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:21:15,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:21:15,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:21:15,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:21:15,990 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:21:15,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:21:15,991 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:21:15,991 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:21:15,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:21:15,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:21:15,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:21:15,993 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:21:15,993 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:21:15,993 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:21:15,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:21:15,994 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:21:15,994 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:21:15,994 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:21:15,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:21:15,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:21:15,995 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:21:15,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:21:15,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:21:15,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:21:15,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:21:15,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:21:15,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:21:15,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:21:15,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6423b7e5fbcc52c08e52aff49c79db620dd407c4 [2020-11-28 03:21:16,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:21:16,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:21:16,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:21:16,369 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:21:16,370 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:21:16,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer/../../sv-benchmarks/c/locks/test_locks_10.c [2020-11-28 03:21:16,471 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer/data/01d901c44/669f9542350d4edf815d72b884638986/FLAG5b080c14f [2020-11-28 03:21:17,023 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:21:17,024 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/sv-benchmarks/c/locks/test_locks_10.c [2020-11-28 03:21:17,037 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer/data/01d901c44/669f9542350d4edf815d72b884638986/FLAG5b080c14f [2020-11-28 03:21:17,359 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer/data/01d901c44/669f9542350d4edf815d72b884638986 [2020-11-28 03:21:17,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:21:17,363 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:21:17,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:21:17,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:21:17,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:21:17,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f89fdd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17, skipping insertion in model container [2020-11-28 03:21:17,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:21:17,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:21:17,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:21:17,639 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:21:17,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:21:17,710 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:21:17,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17 WrapperNode [2020-11-28 03:21:17,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:21:17,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:21:17,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:21:17,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:21:17,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:21:17,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:21:17,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:21:17,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:21:17,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:21:17,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:21:17,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:21:17,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-28 03:21:17,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:21:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-28 03:21:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-28 03:21:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-28 03:21:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:21:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-28 03:21:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:21:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:21:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:21:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:21:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:21:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:21:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:21:18,347 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:21:18,348 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-28 03:21:18,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:18 BoogieIcfgContainer [2020-11-28 03:21:18,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:21:18,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:21:18,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:21:18,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:21:18,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:21:17" (1/3) ... [2020-11-28 03:21:18,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35174bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:21:18, skipping insertion in model container [2020-11-28 03:21:18,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (2/3) ... [2020-11-28 03:21:18,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35174bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:21:18, skipping insertion in model container [2020-11-28 03:21:18,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:18" (3/3) ... [2020-11-28 03:21:18,362 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-11-28 03:21:18,372 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:21:18,376 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:21:18,386 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:21:18,408 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:21:18,408 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:21:18,408 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:21:18,409 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:21:18,409 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:21:18,409 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:21:18,409 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:21:18,409 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:21:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-11-28 03:21:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:21:18,432 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:18,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:18,433 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:18,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:18,440 INFO L82 PathProgramCache]: Analyzing trace with hash -853069560, now seen corresponding path program 1 times [2020-11-28 03:21:18,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:18,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221493738] [2020-11-28 03:21:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:18,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:18,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221493738] [2020-11-28 03:21:18,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:18,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:21:18,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139035800] [2020-11-28 03:21:18,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:21:18,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:18,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:21:18,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:21:18,822 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-11-28 03:21:18,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:18,888 INFO L93 Difference]: Finished difference Result 46 states and 75 transitions. [2020-11-28 03:21:18,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:21:18,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-28 03:21:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:18,906 INFO L225 Difference]: With dead ends: 46 [2020-11-28 03:21:18,914 INFO L226 Difference]: Without dead ends: 41 [2020-11-28 03:21:18,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:21:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-28 03:21:18,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-28 03:21:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 03:21:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 70 transitions. [2020-11-28 03:21:18,965 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 70 transitions. Word has length 9 [2020-11-28 03:21:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:18,966 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 70 transitions. [2020-11-28 03:21:18,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:21:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 70 transitions. [2020-11-28 03:21:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:21:18,967 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:18,968 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] [2020-11-28 03:21:18,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:21:18,968 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1308951589, now seen corresponding path program 1 times [2020-11-28 03:21:18,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:18,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322137670] [2020-11-28 03:21:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:19,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:19,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322137670] [2020-11-28 03:21:19,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:19,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:19,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094287198] [2020-11-28 03:21:19,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:19,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:19,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:19,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:19,175 INFO L87 Difference]: Start difference. First operand 41 states and 70 transitions. Second operand 4 states. [2020-11-28 03:21:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:19,542 INFO L93 Difference]: Finished difference Result 73 states and 130 transitions. [2020-11-28 03:21:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:19,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-28 03:21:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:19,545 INFO L225 Difference]: With dead ends: 73 [2020-11-28 03:21:19,545 INFO L226 Difference]: Without dead ends: 73 [2020-11-28 03:21:19,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-28 03:21:19,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2020-11-28 03:21:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-28 03:21:19,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 91 transitions. [2020-11-28 03:21:19,567 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 91 transitions. Word has length 22 [2020-11-28 03:21:19,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:19,568 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 91 transitions. [2020-11-28 03:21:19,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:19,568 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 91 transitions. [2020-11-28 03:21:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:21:19,570 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:19,571 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] [2020-11-28 03:21:19,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:21:19,571 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:19,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:19,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1974898457, now seen corresponding path program 1 times [2020-11-28 03:21:19,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:19,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839715779] [2020-11-28 03:21:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:19,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:19,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839715779] [2020-11-28 03:21:19,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:19,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:19,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999270931] [2020-11-28 03:21:19,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:19,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:19,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:19,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:19,748 INFO L87 Difference]: Start difference. First operand 52 states and 91 transitions. Second operand 4 states. [2020-11-28 03:21:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:20,045 INFO L93 Difference]: Finished difference Result 73 states and 128 transitions. [2020-11-28 03:21:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:20,046 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-28 03:21:20,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:20,048 INFO L225 Difference]: With dead ends: 73 [2020-11-28 03:21:20,048 INFO L226 Difference]: Without dead ends: 73 [2020-11-28 03:21:20,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-28 03:21:20,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-11-28 03:21:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-28 03:21:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 127 transitions. [2020-11-28 03:21:20,060 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 127 transitions. Word has length 22 [2020-11-28 03:21:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:20,060 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 127 transitions. [2020-11-28 03:21:20,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 127 transitions. [2020-11-28 03:21:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:21:20,062 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:20,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:20,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:21:20,063 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:20,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:20,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1916186131, now seen corresponding path program 1 times [2020-11-28 03:21:20,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:20,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329951569] [2020-11-28 03:21:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:20,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:20,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329951569] [2020-11-28 03:21:20,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:20,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:20,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196247294] [2020-11-28 03:21:20,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:20,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:20,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:20,210 INFO L87 Difference]: Start difference. First operand 72 states and 127 transitions. Second operand 4 states. [2020-11-28 03:21:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:20,452 INFO L93 Difference]: Finished difference Result 76 states and 130 transitions. [2020-11-28 03:21:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:20,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-28 03:21:20,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:20,454 INFO L225 Difference]: With dead ends: 76 [2020-11-28 03:21:20,454 INFO L226 Difference]: Without dead ends: 76 [2020-11-28 03:21:20,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:20,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-28 03:21:20,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-11-28 03:21:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-28 03:21:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 129 transitions. [2020-11-28 03:21:20,474 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 129 transitions. Word has length 23 [2020-11-28 03:21:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:20,475 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 129 transitions. [2020-11-28 03:21:20,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:20,475 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 129 transitions. [2020-11-28 03:21:20,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:21:20,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:20,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:20,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:21:20,479 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:20,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:20,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1098917487, now seen corresponding path program 1 times [2020-11-28 03:21:20,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:20,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750631380] [2020-11-28 03:21:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:20,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:20,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750631380] [2020-11-28 03:21:20,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:20,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:20,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380861009] [2020-11-28 03:21:20,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:20,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:20,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:20,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:20,599 INFO L87 Difference]: Start difference. First operand 75 states and 129 transitions. Second operand 4 states. [2020-11-28 03:21:20,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:20,852 INFO L93 Difference]: Finished difference Result 137 states and 239 transitions. [2020-11-28 03:21:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:20,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-28 03:21:20,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:20,854 INFO L225 Difference]: With dead ends: 137 [2020-11-28 03:21:20,854 INFO L226 Difference]: Without dead ends: 137 [2020-11-28 03:21:20,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:20,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-11-28 03:21:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-11-28 03:21:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-28 03:21:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 238 transitions. [2020-11-28 03:21:20,869 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 238 transitions. Word has length 23 [2020-11-28 03:21:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:20,869 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 238 transitions. [2020-11-28 03:21:20,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 238 transitions. [2020-11-28 03:21:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:21:20,871 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:20,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:20,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:21:20,872 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:20,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:20,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2110034737, now seen corresponding path program 1 times [2020-11-28 03:21:20,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:20,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426142718] [2020-11-28 03:21:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:20,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:21,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426142718] [2020-11-28 03:21:21,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:21,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:21,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552618642] [2020-11-28 03:21:21,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:21,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:21,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:21,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:21,018 INFO L87 Difference]: Start difference. First operand 136 states and 238 transitions. Second operand 4 states. [2020-11-28 03:21:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:21,217 INFO L93 Difference]: Finished difference Result 173 states and 305 transitions. [2020-11-28 03:21:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:21,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-28 03:21:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:21,220 INFO L225 Difference]: With dead ends: 173 [2020-11-28 03:21:21,221 INFO L226 Difference]: Without dead ends: 173 [2020-11-28 03:21:21,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:21,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-28 03:21:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 136. [2020-11-28 03:21:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-28 03:21:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 236 transitions. [2020-11-28 03:21:21,242 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 236 transitions. Word has length 23 [2020-11-28 03:21:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:21,242 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 236 transitions. [2020-11-28 03:21:21,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 236 transitions. [2020-11-28 03:21:21,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:21:21,244 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:21,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:21,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 03:21:21,245 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:21,245 INFO L82 PathProgramCache]: Analyzing trace with hash -286678236, now seen corresponding path program 1 times [2020-11-28 03:21:21,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:21,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435033650] [2020-11-28 03:21:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:21,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:21,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435033650] [2020-11-28 03:21:21,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:21,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:21,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242756337] [2020-11-28 03:21:21,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:21,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:21,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:21,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:21,349 INFO L87 Difference]: Start difference. First operand 136 states and 236 transitions. Second operand 4 states. [2020-11-28 03:21:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:21,574 INFO L93 Difference]: Finished difference Result 249 states and 439 transitions. [2020-11-28 03:21:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:21,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-28 03:21:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:21,585 INFO L225 Difference]: With dead ends: 249 [2020-11-28 03:21:21,585 INFO L226 Difference]: Without dead ends: 249 [2020-11-28 03:21:21,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:21,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-11-28 03:21:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 184. [2020-11-28 03:21:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-11-28 03:21:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 318 transitions. [2020-11-28 03:21:21,605 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 318 transitions. Word has length 24 [2020-11-28 03:21:21,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:21,613 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 318 transitions. [2020-11-28 03:21:21,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:21,613 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 318 transitions. [2020-11-28 03:21:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:21:21,621 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:21,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:21,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 03:21:21,622 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:21,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:21,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1297795486, now seen corresponding path program 1 times [2020-11-28 03:21:21,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:21,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307149982] [2020-11-28 03:21:21,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:21,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:21,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307149982] [2020-11-28 03:21:21,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:21,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:21,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868433341] [2020-11-28 03:21:21,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:21,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:21,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:21,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:21,731 INFO L87 Difference]: Start difference. First operand 184 states and 318 transitions. Second operand 4 states. [2020-11-28 03:21:21,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:21,975 INFO L93 Difference]: Finished difference Result 257 states and 441 transitions. [2020-11-28 03:21:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:21,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-28 03:21:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:21,978 INFO L225 Difference]: With dead ends: 257 [2020-11-28 03:21:21,979 INFO L226 Difference]: Without dead ends: 257 [2020-11-28 03:21:21,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:21,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-11-28 03:21:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2020-11-28 03:21:21,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-11-28 03:21:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 440 transitions. [2020-11-28 03:21:21,995 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 440 transitions. Word has length 24 [2020-11-28 03:21:21,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:21,995 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 440 transitions. [2020-11-28 03:21:21,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 440 transitions. [2020-11-28 03:21:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:21:21,997 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:21,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:21,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 03:21:21,997 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:22,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:22,005 INFO L82 PathProgramCache]: Analyzing trace with hash -290462118, now seen corresponding path program 1 times [2020-11-28 03:21:22,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:22,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111605573] [2020-11-28 03:21:22,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:22,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:22,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111605573] [2020-11-28 03:21:22,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:22,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:22,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783038255] [2020-11-28 03:21:22,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:22,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:22,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:22,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:22,089 INFO L87 Difference]: Start difference. First operand 256 states and 440 transitions. Second operand 4 states. [2020-11-28 03:21:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:22,320 INFO L93 Difference]: Finished difference Result 263 states and 445 transitions. [2020-11-28 03:21:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:22,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-28 03:21:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:22,323 INFO L225 Difference]: With dead ends: 263 [2020-11-28 03:21:22,323 INFO L226 Difference]: Without dead ends: 263 [2020-11-28 03:21:22,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:22,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-11-28 03:21:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2020-11-28 03:21:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-11-28 03:21:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 444 transitions. [2020-11-28 03:21:22,332 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 444 transitions. Word has length 25 [2020-11-28 03:21:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:22,332 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 444 transitions. [2020-11-28 03:21:22,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:22,333 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 444 transitions. [2020-11-28 03:21:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:21:22,340 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:22,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:22,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 03:21:22,341 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:22,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1570325796, now seen corresponding path program 1 times [2020-11-28 03:21:22,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:22,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30907950] [2020-11-28 03:21:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:22,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:22,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30907950] [2020-11-28 03:21:22,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:22,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:22,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965064019] [2020-11-28 03:21:22,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:22,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:22,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:22,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:22,426 INFO L87 Difference]: Start difference. First operand 262 states and 444 transitions. Second operand 4 states. [2020-11-28 03:21:22,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:22,640 INFO L93 Difference]: Finished difference Result 475 states and 813 transitions. [2020-11-28 03:21:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:22,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-28 03:21:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:22,644 INFO L225 Difference]: With dead ends: 475 [2020-11-28 03:21:22,644 INFO L226 Difference]: Without dead ends: 475 [2020-11-28 03:21:22,645 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 [2020-11-28 03:21:22,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-11-28 03:21:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 362. [2020-11-28 03:21:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-11-28 03:21:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 604 transitions. [2020-11-28 03:21:22,660 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 604 transitions. Word has length 25 [2020-11-28 03:21:22,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:22,660 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 604 transitions. [2020-11-28 03:21:22,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 604 transitions. [2020-11-28 03:21:22,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:21:22,662 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:22,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:22,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 03:21:22,663 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:22,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:22,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1713524250, now seen corresponding path program 1 times [2020-11-28 03:21:22,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:22,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24161771] [2020-11-28 03:21:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:22,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:22,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24161771] [2020-11-28 03:21:22,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:22,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:22,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31018199] [2020-11-28 03:21:22,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:22,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:22,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:22,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:22,728 INFO L87 Difference]: Start difference. First operand 362 states and 604 transitions. Second operand 4 states. [2020-11-28 03:21:22,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:22,931 INFO L93 Difference]: Finished difference Result 499 states and 825 transitions. [2020-11-28 03:21:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:22,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-28 03:21:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:22,935 INFO L225 Difference]: With dead ends: 499 [2020-11-28 03:21:22,935 INFO L226 Difference]: Without dead ends: 499 [2020-11-28 03:21:22,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-11-28 03:21:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 498. [2020-11-28 03:21:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-11-28 03:21:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 824 transitions. [2020-11-28 03:21:22,957 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 824 transitions. Word has length 25 [2020-11-28 03:21:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:22,958 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 824 transitions. [2020-11-28 03:21:22,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 824 transitions. [2020-11-28 03:21:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:21:22,962 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:22,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:22,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 03:21:22,963 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:22,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1428820243, now seen corresponding path program 1 times [2020-11-28 03:21:22,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:22,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996777742] [2020-11-28 03:21:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:23,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:23,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996777742] [2020-11-28 03:21:23,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:23,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:23,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210469115] [2020-11-28 03:21:23,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:23,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:23,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:23,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:23,089 INFO L87 Difference]: Start difference. First operand 498 states and 824 transitions. Second operand 4 states. [2020-11-28 03:21:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:23,306 INFO L93 Difference]: Finished difference Result 507 states and 825 transitions. [2020-11-28 03:21:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:23,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-28 03:21:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:23,310 INFO L225 Difference]: With dead ends: 507 [2020-11-28 03:21:23,310 INFO L226 Difference]: Without dead ends: 507 [2020-11-28 03:21:23,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-11-28 03:21:23,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 506. [2020-11-28 03:21:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-11-28 03:21:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 824 transitions. [2020-11-28 03:21:23,329 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 824 transitions. Word has length 26 [2020-11-28 03:21:23,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:23,330 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 824 transitions. [2020-11-28 03:21:23,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:23,330 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 824 transitions. [2020-11-28 03:21:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:21:23,331 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:23,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:23,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 03:21:23,331 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:23,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1586283375, now seen corresponding path program 1 times [2020-11-28 03:21:23,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:23,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022523504] [2020-11-28 03:21:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:23,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:23,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022523504] [2020-11-28 03:21:23,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:23,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:23,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517849751] [2020-11-28 03:21:23,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:23,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:23,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:23,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:23,425 INFO L87 Difference]: Start difference. First operand 506 states and 824 transitions. Second operand 4 states. [2020-11-28 03:21:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:23,631 INFO L93 Difference]: Finished difference Result 907 states and 1489 transitions. [2020-11-28 03:21:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:23,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-28 03:21:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:23,638 INFO L225 Difference]: With dead ends: 907 [2020-11-28 03:21:23,638 INFO L226 Difference]: Without dead ends: 907 [2020-11-28 03:21:23,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:23,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2020-11-28 03:21:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 714. [2020-11-28 03:21:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2020-11-28 03:21:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1136 transitions. [2020-11-28 03:21:23,666 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1136 transitions. Word has length 26 [2020-11-28 03:21:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:23,666 INFO L481 AbstractCegarLoop]: Abstraction has 714 states and 1136 transitions. [2020-11-28 03:21:23,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1136 transitions. [2020-11-28 03:21:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:21:23,668 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:23,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:23,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 03:21:23,669 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:23,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:23,669 INFO L82 PathProgramCache]: Analyzing trace with hash 575166125, now seen corresponding path program 1 times [2020-11-28 03:21:23,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:23,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711161760] [2020-11-28 03:21:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:23,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:23,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711161760] [2020-11-28 03:21:23,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:23,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:23,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141398316] [2020-11-28 03:21:23,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:23,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:23,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:23,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:23,745 INFO L87 Difference]: Start difference. First operand 714 states and 1136 transitions. Second operand 4 states. [2020-11-28 03:21:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:23,959 INFO L93 Difference]: Finished difference Result 971 states and 1529 transitions. [2020-11-28 03:21:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:23,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-28 03:21:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:23,967 INFO L225 Difference]: With dead ends: 971 [2020-11-28 03:21:23,967 INFO L226 Difference]: Without dead ends: 971 [2020-11-28 03:21:23,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:23,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2020-11-28 03:21:23,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 970. [2020-11-28 03:21:23,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-11-28 03:21:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1528 transitions. [2020-11-28 03:21:24,000 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1528 transitions. Word has length 26 [2020-11-28 03:21:24,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:24,000 INFO L481 AbstractCegarLoop]: Abstraction has 970 states and 1528 transitions. [2020-11-28 03:21:24,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1528 transitions. [2020-11-28 03:21:24,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:21:24,004 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:24,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:24,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 03:21:24,004 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:24,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1936794117, now seen corresponding path program 1 times [2020-11-28 03:21:24,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:24,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582356009] [2020-11-28 03:21:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:24,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:24,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582356009] [2020-11-28 03:21:24,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:24,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:24,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24899358] [2020-11-28 03:21:24,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:24,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:24,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:24,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:24,080 INFO L87 Difference]: Start difference. First operand 970 states and 1528 transitions. Second operand 4 states. [2020-11-28 03:21:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:24,257 INFO L93 Difference]: Finished difference Result 987 states and 1529 transitions. [2020-11-28 03:21:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:24,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-28 03:21:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:24,264 INFO L225 Difference]: With dead ends: 987 [2020-11-28 03:21:24,264 INFO L226 Difference]: Without dead ends: 987 [2020-11-28 03:21:24,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2020-11-28 03:21:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 986. [2020-11-28 03:21:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 986 states. [2020-11-28 03:21:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1528 transitions. [2020-11-28 03:21:24,297 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1528 transitions. Word has length 27 [2020-11-28 03:21:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:24,298 INFO L481 AbstractCegarLoop]: Abstraction has 986 states and 1528 transitions. [2020-11-28 03:21:24,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:24,298 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1528 transitions. [2020-11-28 03:21:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:21:24,300 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:24,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:24,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-28 03:21:24,300 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:24,301 INFO L82 PathProgramCache]: Analyzing trace with hash 656930439, now seen corresponding path program 1 times [2020-11-28 03:21:24,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:24,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747271351] [2020-11-28 03:21:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:24,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:24,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747271351] [2020-11-28 03:21:24,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:24,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:24,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258590895] [2020-11-28 03:21:24,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:24,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:24,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:24,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:24,396 INFO L87 Difference]: Start difference. First operand 986 states and 1528 transitions. Second operand 4 states. [2020-11-28 03:21:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:24,619 INFO L93 Difference]: Finished difference Result 1739 states and 2713 transitions. [2020-11-28 03:21:24,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:24,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-28 03:21:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:24,630 INFO L225 Difference]: With dead ends: 1739 [2020-11-28 03:21:24,631 INFO L226 Difference]: Without dead ends: 1739 [2020-11-28 03:21:24,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2020-11-28 03:21:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1418. [2020-11-28 03:21:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1418 states. [2020-11-28 03:21:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 2136 transitions. [2020-11-28 03:21:24,673 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 2136 transitions. Word has length 27 [2020-11-28 03:21:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:24,674 INFO L481 AbstractCegarLoop]: Abstraction has 1418 states and 2136 transitions. [2020-11-28 03:21:24,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 2136 transitions. [2020-11-28 03:21:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:21:24,677 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:24,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:24,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-28 03:21:24,678 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:24,679 INFO L82 PathProgramCache]: Analyzing trace with hash -354186811, now seen corresponding path program 1 times [2020-11-28 03:21:24,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:24,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390639296] [2020-11-28 03:21:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:24,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:24,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390639296] [2020-11-28 03:21:24,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:24,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:24,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817249364] [2020-11-28 03:21:24,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:24,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:24,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:24,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:24,776 INFO L87 Difference]: Start difference. First operand 1418 states and 2136 transitions. Second operand 4 states. [2020-11-28 03:21:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:24,979 INFO L93 Difference]: Finished difference Result 1899 states and 2825 transitions. [2020-11-28 03:21:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:24,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-28 03:21:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:24,992 INFO L225 Difference]: With dead ends: 1899 [2020-11-28 03:21:24,992 INFO L226 Difference]: Without dead ends: 1899 [2020-11-28 03:21:24,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:24,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2020-11-28 03:21:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1898. [2020-11-28 03:21:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1898 states. [2020-11-28 03:21:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 2824 transitions. [2020-11-28 03:21:25,059 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 2824 transitions. Word has length 27 [2020-11-28 03:21:25,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:25,059 INFO L481 AbstractCegarLoop]: Abstraction has 1898 states and 2824 transitions. [2020-11-28 03:21:25,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:25,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 2824 transitions. [2020-11-28 03:21:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:21:25,062 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:25,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:25,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-28 03:21:25,063 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:25,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1103332552, now seen corresponding path program 1 times [2020-11-28 03:21:25,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:25,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316354185] [2020-11-28 03:21:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:25,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:25,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316354185] [2020-11-28 03:21:25,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:25,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:25,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188272727] [2020-11-28 03:21:25,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:25,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:25,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:25,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:25,163 INFO L87 Difference]: Start difference. First operand 1898 states and 2824 transitions. Second operand 4 states. [2020-11-28 03:21:25,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:25,375 INFO L93 Difference]: Finished difference Result 1931 states and 2825 transitions. [2020-11-28 03:21:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:25,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-28 03:21:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:25,389 INFO L225 Difference]: With dead ends: 1931 [2020-11-28 03:21:25,389 INFO L226 Difference]: Without dead ends: 1931 [2020-11-28 03:21:25,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:25,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2020-11-28 03:21:25,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1930. [2020-11-28 03:21:25,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-11-28 03:21:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2824 transitions. [2020-11-28 03:21:25,452 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2824 transitions. Word has length 28 [2020-11-28 03:21:25,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:25,453 INFO L481 AbstractCegarLoop]: Abstraction has 1930 states and 2824 transitions. [2020-11-28 03:21:25,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:25,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2824 transitions. [2020-11-28 03:21:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:21:25,456 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:25,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:25,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-28 03:21:25,457 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:25,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:25,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1911771066, now seen corresponding path program 1 times [2020-11-28 03:21:25,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:25,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139452502] [2020-11-28 03:21:25,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:25,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:25,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139452502] [2020-11-28 03:21:25,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:25,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:25,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023930812] [2020-11-28 03:21:25,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:25,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:25,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:25,524 INFO L87 Difference]: Start difference. First operand 1930 states and 2824 transitions. Second operand 4 states. [2020-11-28 03:21:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:25,732 INFO L93 Difference]: Finished difference Result 3339 states and 4905 transitions. [2020-11-28 03:21:25,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:25,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-28 03:21:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:25,754 INFO L225 Difference]: With dead ends: 3339 [2020-11-28 03:21:25,754 INFO L226 Difference]: Without dead ends: 3339 [2020-11-28 03:21:25,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2020-11-28 03:21:25,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2826. [2020-11-28 03:21:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2826 states. [2020-11-28 03:21:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 4008 transitions. [2020-11-28 03:21:25,880 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 4008 transitions. Word has length 28 [2020-11-28 03:21:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:25,880 INFO L481 AbstractCegarLoop]: Abstraction has 2826 states and 4008 transitions. [2020-11-28 03:21:25,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 4008 transitions. [2020-11-28 03:21:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:21:25,885 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:25,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:25,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-28 03:21:25,886 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:25,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:25,887 INFO L82 PathProgramCache]: Analyzing trace with hash 900653816, now seen corresponding path program 1 times [2020-11-28 03:21:25,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:25,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279991221] [2020-11-28 03:21:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:25,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:25,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279991221] [2020-11-28 03:21:25,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:25,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:25,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486773996] [2020-11-28 03:21:25,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:25,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:25,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:25,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:25,956 INFO L87 Difference]: Start difference. First operand 2826 states and 4008 transitions. Second operand 4 states. [2020-11-28 03:21:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:26,195 INFO L93 Difference]: Finished difference Result 3723 states and 5193 transitions. [2020-11-28 03:21:26,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:26,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-28 03:21:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:26,223 INFO L225 Difference]: With dead ends: 3723 [2020-11-28 03:21:26,223 INFO L226 Difference]: Without dead ends: 3723 [2020-11-28 03:21:26,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:26,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2020-11-28 03:21:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3722. [2020-11-28 03:21:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3722 states. [2020-11-28 03:21:26,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 5192 transitions. [2020-11-28 03:21:26,337 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 5192 transitions. Word has length 28 [2020-11-28 03:21:26,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:26,338 INFO L481 AbstractCegarLoop]: Abstraction has 3722 states and 5192 transitions. [2020-11-28 03:21:26,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:26,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 5192 transitions. [2020-11-28 03:21:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 03:21:26,343 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:26,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:26,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-28 03:21:26,344 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:26,345 INFO L82 PathProgramCache]: Analyzing trace with hash -857968208, now seen corresponding path program 1 times [2020-11-28 03:21:26,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:26,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182347265] [2020-11-28 03:21:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:26,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:26,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182347265] [2020-11-28 03:21:26,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:26,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:26,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708672550] [2020-11-28 03:21:26,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:26,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:26,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:26,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:26,408 INFO L87 Difference]: Start difference. First operand 3722 states and 5192 transitions. Second operand 4 states. [2020-11-28 03:21:26,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:26,639 INFO L93 Difference]: Finished difference Result 3787 states and 5193 transitions. [2020-11-28 03:21:26,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:26,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-28 03:21:26,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:26,663 INFO L225 Difference]: With dead ends: 3787 [2020-11-28 03:21:26,664 INFO L226 Difference]: Without dead ends: 3787 [2020-11-28 03:21:26,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2020-11-28 03:21:26,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3786. [2020-11-28 03:21:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3786 states. [2020-11-28 03:21:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 5192 transitions. [2020-11-28 03:21:26,781 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 5192 transitions. Word has length 29 [2020-11-28 03:21:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:26,782 INFO L481 AbstractCegarLoop]: Abstraction has 3786 states and 5192 transitions. [2020-11-28 03:21:26,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 5192 transitions. [2020-11-28 03:21:26,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 03:21:26,789 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:26,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:26,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-28 03:21:26,790 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:26,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:26,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2137831886, now seen corresponding path program 1 times [2020-11-28 03:21:26,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:26,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554001583] [2020-11-28 03:21:26,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:26,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:26,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554001583] [2020-11-28 03:21:26,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:26,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:26,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640110752] [2020-11-28 03:21:26,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:26,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:26,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:26,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:26,855 INFO L87 Difference]: Start difference. First operand 3786 states and 5192 transitions. Second operand 4 states. [2020-11-28 03:21:27,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:27,081 INFO L93 Difference]: Finished difference Result 6411 states and 8777 transitions. [2020-11-28 03:21:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:27,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-28 03:21:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:27,131 INFO L225 Difference]: With dead ends: 6411 [2020-11-28 03:21:27,131 INFO L226 Difference]: Without dead ends: 6411 [2020-11-28 03:21:27,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2020-11-28 03:21:27,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5642. [2020-11-28 03:21:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5642 states. [2020-11-28 03:21:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5642 states to 5642 states and 7496 transitions. [2020-11-28 03:21:27,298 INFO L78 Accepts]: Start accepts. Automaton has 5642 states and 7496 transitions. Word has length 29 [2020-11-28 03:21:27,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:27,299 INFO L481 AbstractCegarLoop]: Abstraction has 5642 states and 7496 transitions. [2020-11-28 03:21:27,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 5642 states and 7496 transitions. [2020-11-28 03:21:27,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 03:21:27,308 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:27,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:27,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-28 03:21:27,309 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:27,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1146018160, now seen corresponding path program 1 times [2020-11-28 03:21:27,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:27,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247007680] [2020-11-28 03:21:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:27,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:27,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247007680] [2020-11-28 03:21:27,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:27,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:27,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600327050] [2020-11-28 03:21:27,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:27,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:27,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:27,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:27,385 INFO L87 Difference]: Start difference. First operand 5642 states and 7496 transitions. Second operand 4 states. [2020-11-28 03:21:27,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:27,648 INFO L93 Difference]: Finished difference Result 7307 states and 9481 transitions. [2020-11-28 03:21:27,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:27,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-28 03:21:27,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:27,665 INFO L225 Difference]: With dead ends: 7307 [2020-11-28 03:21:27,665 INFO L226 Difference]: Without dead ends: 7307 [2020-11-28 03:21:27,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2020-11-28 03:21:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 7306. [2020-11-28 03:21:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7306 states. [2020-11-28 03:21:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7306 states to 7306 states and 9480 transitions. [2020-11-28 03:21:27,891 INFO L78 Accepts]: Start accepts. Automaton has 7306 states and 9480 transitions. Word has length 29 [2020-11-28 03:21:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:27,892 INFO L481 AbstractCegarLoop]: Abstraction has 7306 states and 9480 transitions. [2020-11-28 03:21:27,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 7306 states and 9480 transitions. [2020-11-28 03:21:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:21:27,904 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:27,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:27,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-28 03:21:27,905 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:27,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:27,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1841597565, now seen corresponding path program 1 times [2020-11-28 03:21:27,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:27,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205384514] [2020-11-28 03:21:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:27,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:27,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205384514] [2020-11-28 03:21:27,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:27,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:27,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466237053] [2020-11-28 03:21:27,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:27,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:27,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:27,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:27,983 INFO L87 Difference]: Start difference. First operand 7306 states and 9480 transitions. Second operand 4 states. [2020-11-28 03:21:28,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:28,234 INFO L93 Difference]: Finished difference Result 7435 states and 9481 transitions. [2020-11-28 03:21:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:28,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-28 03:21:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:28,250 INFO L225 Difference]: With dead ends: 7435 [2020-11-28 03:21:28,250 INFO L226 Difference]: Without dead ends: 7435 [2020-11-28 03:21:28,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7435 states. [2020-11-28 03:21:28,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7435 to 7434. [2020-11-28 03:21:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7434 states. [2020-11-28 03:21:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7434 states to 7434 states and 9480 transitions. [2020-11-28 03:21:28,482 INFO L78 Accepts]: Start accepts. Automaton has 7434 states and 9480 transitions. Word has length 30 [2020-11-28 03:21:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:28,482 INFO L481 AbstractCegarLoop]: Abstraction has 7434 states and 9480 transitions. [2020-11-28 03:21:28,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 7434 states and 9480 transitions. [2020-11-28 03:21:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:21:28,493 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:28,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:28,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-28 03:21:28,493 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:28,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:28,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1173506053, now seen corresponding path program 1 times [2020-11-28 03:21:28,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:28,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020201896] [2020-11-28 03:21:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:28,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:28,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020201896] [2020-11-28 03:21:28,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:28,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:28,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705274886] [2020-11-28 03:21:28,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:28,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:28,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:28,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:28,568 INFO L87 Difference]: Start difference. First operand 7434 states and 9480 transitions. Second operand 4 states. [2020-11-28 03:21:28,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:28,888 INFO L93 Difference]: Finished difference Result 12299 states and 15497 transitions. [2020-11-28 03:21:28,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:28,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-28 03:21:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:28,917 INFO L225 Difference]: With dead ends: 12299 [2020-11-28 03:21:28,917 INFO L226 Difference]: Without dead ends: 12299 [2020-11-28 03:21:28,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12299 states. [2020-11-28 03:21:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 11274. [2020-11-28 03:21:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11274 states. [2020-11-28 03:21:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11274 states to 11274 states and 13960 transitions. [2020-11-28 03:21:29,235 INFO L78 Accepts]: Start accepts. Automaton has 11274 states and 13960 transitions. Word has length 30 [2020-11-28 03:21:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:29,235 INFO L481 AbstractCegarLoop]: Abstraction has 11274 states and 13960 transitions. [2020-11-28 03:21:29,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 11274 states and 13960 transitions. [2020-11-28 03:21:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:21:29,255 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:29,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:29,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-28 03:21:29,256 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:29,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:29,257 INFO L82 PathProgramCache]: Analyzing trace with hash 162388803, now seen corresponding path program 1 times [2020-11-28 03:21:29,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:29,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380321112] [2020-11-28 03:21:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:29,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:29,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380321112] [2020-11-28 03:21:29,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:29,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:29,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580690777] [2020-11-28 03:21:29,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:29,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:29,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:29,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:29,333 INFO L87 Difference]: Start difference. First operand 11274 states and 13960 transitions. Second operand 4 states. [2020-11-28 03:21:29,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:29,579 INFO L93 Difference]: Finished difference Result 14347 states and 17161 transitions. [2020-11-28 03:21:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:29,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-28 03:21:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:29,611 INFO L225 Difference]: With dead ends: 14347 [2020-11-28 03:21:29,612 INFO L226 Difference]: Without dead ends: 14347 [2020-11-28 03:21:29,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14347 states. [2020-11-28 03:21:29,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14347 to 14346. [2020-11-28 03:21:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14346 states. [2020-11-28 03:21:30,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14346 states to 14346 states and 17160 transitions. [2020-11-28 03:21:30,091 INFO L78 Accepts]: Start accepts. Automaton has 14346 states and 17160 transitions. Word has length 30 [2020-11-28 03:21:30,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:30,091 INFO L481 AbstractCegarLoop]: Abstraction has 14346 states and 17160 transitions. [2020-11-28 03:21:30,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:30,092 INFO L276 IsEmpty]: Start isEmpty. Operand 14346 states and 17160 transitions. [2020-11-28 03:21:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:21:30,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:30,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:30,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-28 03:21:30,116 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:30,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:30,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2025641307, now seen corresponding path program 1 times [2020-11-28 03:21:30,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:30,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458024905] [2020-11-28 03:21:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:30,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:30,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458024905] [2020-11-28 03:21:30,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:30,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:30,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570490671] [2020-11-28 03:21:30,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:30,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:30,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:30,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:30,192 INFO L87 Difference]: Start difference. First operand 14346 states and 17160 transitions. Second operand 4 states. [2020-11-28 03:21:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:30,443 INFO L93 Difference]: Finished difference Result 14603 states and 17161 transitions. [2020-11-28 03:21:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:30,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-28 03:21:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:30,472 INFO L225 Difference]: With dead ends: 14603 [2020-11-28 03:21:30,472 INFO L226 Difference]: Without dead ends: 14603 [2020-11-28 03:21:30,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14603 states. [2020-11-28 03:21:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14603 to 14602. [2020-11-28 03:21:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14602 states. [2020-11-28 03:21:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14602 states to 14602 states and 17160 transitions. [2020-11-28 03:21:30,755 INFO L78 Accepts]: Start accepts. Automaton has 14602 states and 17160 transitions. Word has length 31 [2020-11-28 03:21:30,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:30,756 INFO L481 AbstractCegarLoop]: Abstraction has 14602 states and 17160 transitions. [2020-11-28 03:21:30,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 14602 states and 17160 transitions. [2020-11-28 03:21:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:21:30,772 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:30,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:30,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-28 03:21:30,772 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:30,773 INFO L82 PathProgramCache]: Analyzing trace with hash 745777629, now seen corresponding path program 1 times [2020-11-28 03:21:30,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:30,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978756127] [2020-11-28 03:21:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:30,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:30,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978756127] [2020-11-28 03:21:30,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:30,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:30,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314255992] [2020-11-28 03:21:30,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:30,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:30,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:30,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:30,822 INFO L87 Difference]: Start difference. First operand 14602 states and 17160 transitions. Second operand 4 states. [2020-11-28 03:21:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:31,060 INFO L93 Difference]: Finished difference Result 28170 states and 31240 transitions. [2020-11-28 03:21:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:31,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-28 03:21:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:31,088 INFO L225 Difference]: With dead ends: 28170 [2020-11-28 03:21:31,089 INFO L226 Difference]: Without dead ends: 14602 [2020-11-28 03:21:31,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:31,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-11-28 03:21:31,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14602. [2020-11-28 03:21:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14602 states. [2020-11-28 03:21:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14602 states to 14602 states and 16136 transitions. [2020-11-28 03:21:31,456 INFO L78 Accepts]: Start accepts. Automaton has 14602 states and 16136 transitions. Word has length 31 [2020-11-28 03:21:31,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:31,456 INFO L481 AbstractCegarLoop]: Abstraction has 14602 states and 16136 transitions. [2020-11-28 03:21:31,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:31,456 INFO L276 IsEmpty]: Start isEmpty. Operand 14602 states and 16136 transitions. [2020-11-28 03:21:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:21:31,472 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:31,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:31,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-28 03:21:31,473 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-28 03:21:31,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:31,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1756894879, now seen corresponding path program 1 times [2020-11-28 03:21:31,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:31,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794561330] [2020-11-28 03:21:31,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:31,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:31,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794561330] [2020-11-28 03:21:31,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:31,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:31,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807940205] [2020-11-28 03:21:31,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:31,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:31,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:31,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:31,536 INFO L87 Difference]: Start difference. First operand 14602 states and 16136 transitions. Second operand 4 states. [2020-11-28 03:21:31,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:31,655 INFO L93 Difference]: Finished difference Result 14599 states and 15622 transitions. [2020-11-28 03:21:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:31,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-28 03:21:31,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:31,656 INFO L225 Difference]: With dead ends: 14599 [2020-11-28 03:21:31,656 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:21:31,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:21:31,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:21:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:21:31,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:21:31,659 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-11-28 03:21:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:31,659 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:21:31,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:21:31,659 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:21:31,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-28 03:21:31,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:21:31 BoogieIcfgContainer [2020-11-28 03:21:31,670 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:21:31,671 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:21:31,671 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:21:31,671 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:21:31,671 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:18" (3/4) ... [2020-11-28 03:21:31,674 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:21:31,680 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-11-28 03:21:31,680 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-28 03:21:31,680 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-28 03:21:31,690 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-28 03:21:31,691 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:21:31,691 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 03:21:31,691 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:21:31,758 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d4081fcf-8f2b-421b-93ea-50a3677ede3a/bin/uautomizer/witness.graphml [2020-11-28 03:21:31,758 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:21:31,760 INFO L168 Benchmark]: Toolchain (without parser) took 14395.98 ms. Allocated memory was 100.7 MB in the beginning and 427.8 MB in the end (delta: 327.2 MB). Free memory was 65.1 MB in the beginning and 224.7 MB in the end (delta: -159.5 MB). Peak memory consumption was 167.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:31,761 INFO L168 Benchmark]: CDTParser took 2.00 ms. Allocated memory is still 100.7 MB. Free memory is still 81.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:31,762 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.74 ms. Allocated memory is still 100.7 MB. Free memory was 64.9 MB in the beginning and 77.1 MB in the end (delta: -12.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:31,762 INFO L168 Benchmark]: Boogie Preprocessor took 46.57 ms. Allocated memory is still 100.7 MB. Free memory was 77.1 MB in the beginning and 75.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:31,762 INFO L168 Benchmark]: RCFGBuilder took 586.95 ms. Allocated memory is still 100.7 MB. Free memory was 75.2 MB in the beginning and 54.7 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:31,763 INFO L168 Benchmark]: TraceAbstraction took 13318.36 ms. Allocated memory was 100.7 MB in the beginning and 427.8 MB in the end (delta: 327.2 MB). Free memory was 54.1 MB in the beginning and 228.9 MB in the end (delta: -174.8 MB). Peak memory consumption was 155.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:31,765 INFO L168 Benchmark]: Witness Printer took 87.76 ms. Allocated memory is still 427.8 MB. Free memory was 228.9 MB in the beginning and 224.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:31,768 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.00 ms. Allocated memory is still 100.7 MB. Free memory is still 81.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 348.74 ms. Allocated memory is still 100.7 MB. Free memory was 64.9 MB in the beginning and 77.1 MB in the end (delta: -12.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.57 ms. Allocated memory is still 100.7 MB. Free memory was 77.1 MB in the beginning and 75.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 586.95 ms. Allocated memory is still 100.7 MB. Free memory was 75.2 MB in the beginning and 54.7 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13318.36 ms. Allocated memory was 100.7 MB in the beginning and 427.8 MB in the end (delta: 327.2 MB). Free memory was 54.1 MB in the beginning and 228.9 MB in the end (delta: -174.8 MB). Peak memory consumption was 155.2 MB. Max. memory is 16.1 GB. * Witness Printer took 87.76 ms. Allocated memory is still 427.8 MB. Free memory was 228.9 MB in the beginning and 224.7 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, 50 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.2s, OverallIterations: 29, TraceHistogramMax: 1, AutomataDifference: 7.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2450 SDtfs, 3578 SDslu, 216 SDs, 0 SdLazy, 1705 SolverSat, 103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 199 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14602occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.8s AutomataMinimizationTime, 29 MinimizatonAttempts, 3074 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 758 NumberOfCodeBlocks, 758 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 729 ConstructedInterpolants, 0 QuantifiedInterpolants, 57759 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 29 InterpolantComputations, 29 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...