./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_9.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_9.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/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 20a70402cc893fb2c7adec21ca8a267adc3c5cbb .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:00:38,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:00:38,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:00:38,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:00:38,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:00:38,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:00:38,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:00:38,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:00:38,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:00:38,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:00:38,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:00:38,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:00:38,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:00:38,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:00:38,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:00:38,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:00:38,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:00:38,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:00:38,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:00:38,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:00:38,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:00:38,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:00:38,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:00:38,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:00:38,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:00:38,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:00:38,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:00:38,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:00:38,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:00:38,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:00:38,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:00:38,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:00:38,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:00:38,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:00:38,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:00:38,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:00:38,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:00:38,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:00:38,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:00:38,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:00:38,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:00:38,251 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-30 00:00:38,282 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:00:38,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:00:38,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:00:38,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:00:38,284 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:00:38,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:00:38,285 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:00:38,285 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 00:00:38,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:00:38,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:00:38,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:00:38,286 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 00:00:38,286 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 00:00:38,286 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 00:00:38,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:00:38,287 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 00:00:38,287 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:00:38,287 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:00:38,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:00:38,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:00:38,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:00:38,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:00:38,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:00:38,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:00:38,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:00:38,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:00:38,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:00:38,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:00:38,290 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_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20a70402cc893fb2c7adec21ca8a267adc3c5cbb [2020-11-30 00:00:38,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:00:38,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:00:38,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:00:38,660 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:00:38,664 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:00:38,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/bin/uautomizer/../../sv-benchmarks/c/locks/test_locks_9.c [2020-11-30 00:00:38,801 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/bin/uautomizer/data/afe1056d1/b6419c47c59e48dfb51ef6f659f242b7/FLAG338ec184d [2020-11-30 00:00:39,324 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:00:39,325 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/sv-benchmarks/c/locks/test_locks_9.c [2020-11-30 00:00:39,351 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/bin/uautomizer/data/afe1056d1/b6419c47c59e48dfb51ef6f659f242b7/FLAG338ec184d [2020-11-30 00:00:39,696 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/bin/uautomizer/data/afe1056d1/b6419c47c59e48dfb51ef6f659f242b7 [2020-11-30 00:00:39,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:00:39,701 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-30 00:00:39,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:00:39,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:00:39,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:00:39,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:00:39" (1/1) ... [2020-11-30 00:00:39,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@325e764a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:00:39, skipping insertion in model container [2020-11-30 00:00:39,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:00:39" (1/1) ... [2020-11-30 00:00:39,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:00:39,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:00:39,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:00:39,963 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:00:40,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:00:40,046 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:00:40,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:00:40 WrapperNode [2020-11-30 00:00:40,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:00:40,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:00:40,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:00:40,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:00:40,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:00:40" (1/1) ... [2020-11-30 00:00:40,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:00:40" (1/1) ... [2020-11-30 00:00:40,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:00:40" (1/1) ... [2020-11-30 00:00:40,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:00:40" (1/1) ... [2020-11-30 00:00:40,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:00:40" (1/1) ... [2020-11-30 00:00:40,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:00:40" (1/1) ... [2020-11-30 00:00:40,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:00:40" (1/1) ... [2020-11-30 00:00:40,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:00:40,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:00:40,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:00:40,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:00:40,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:00:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/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 [2020-11-30 00:00:40,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-30 00:00:40,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:00:40,193 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-30 00:00:40,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-30 00:00:40,194 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-30 00:00:40,194 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-30 00:00:40,194 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-30 00:00:40,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:00:40,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-30 00:00:40,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-30 00:00:40,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-30 00:00:40,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:00:40,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:00:40,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 00:00:40,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 00:00:40,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 00:00:40,838 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:00:40,838 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-30 00:00:40,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:00:40 BoogieIcfgContainer [2020-11-30 00:00:40,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:00:40,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:00:40,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:00:40,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:00:40,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:00:39" (1/3) ... [2020-11-30 00:00:40,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629d7eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:00:40, skipping insertion in model container [2020-11-30 00:00:40,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:00:40" (2/3) ... [2020-11-30 00:00:40,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629d7eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:00:40, skipping insertion in model container [2020-11-30 00:00:40,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:00:40" (3/3) ... [2020-11-30 00:00:40,856 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-11-30 00:00:40,870 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:00:40,881 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-30 00:00:40,895 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-30 00:00:40,920 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:00:40,920 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 00:00:40,920 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:00:40,921 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:00:40,921 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:00:40,921 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:00:40,921 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:00:40,921 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:00:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-11-30 00:00:40,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 00:00:40,955 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:40,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:00:40,956 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:40,965 INFO L82 PathProgramCache]: Analyzing trace with hash -693527066, now seen corresponding path program 1 times [2020-11-30 00:00:40,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:40,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761958193] [2020-11-30 00:00:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:41,322 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-11-30 00:00:41,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:41,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761958193] [2020-11-30 00:00:41,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:41,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:00:41,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294684541] [2020-11-30 00:00:41,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:00:41,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:41,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:00:41,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:00:41,380 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-11-30 00:00:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:41,437 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2020-11-30 00:00:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:00:41,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-30 00:00:41,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:41,451 INFO L225 Difference]: With dead ends: 43 [2020-11-30 00:00:41,451 INFO L226 Difference]: Without dead ends: 38 [2020-11-30 00:00:41,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:00:41,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-30 00:00:41,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-30 00:00:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-30 00:00:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2020-11-30 00:00:41,532 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 9 [2020-11-30 00:00:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:41,532 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2020-11-30 00:00:41,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:00:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2020-11-30 00:00:41,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 00:00:41,534 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:41,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:00:41,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:00:41,535 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:41,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:41,537 INFO L82 PathProgramCache]: Analyzing trace with hash 838313058, now seen corresponding path program 1 times [2020-11-30 00:00:41,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:41,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141197400] [2020-11-30 00:00:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:41,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:41,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141197400] [2020-11-30 00:00:41,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:41,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:41,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400459486] [2020-11-30 00:00:41,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:41,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:41,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:41,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:41,765 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand 4 states. [2020-11-30 00:00:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:42,083 INFO L93 Difference]: Finished difference Result 67 states and 118 transitions. [2020-11-30 00:00:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:42,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-30 00:00:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:42,087 INFO L225 Difference]: With dead ends: 67 [2020-11-30 00:00:42,088 INFO L226 Difference]: Without dead ends: 67 [2020-11-30 00:00:42,089 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 [2020-11-30 00:00:42,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-30 00:00:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2020-11-30 00:00:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-30 00:00:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 83 transitions. [2020-11-30 00:00:42,111 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 83 transitions. Word has length 21 [2020-11-30 00:00:42,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:42,111 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 83 transitions. [2020-11-30 00:00:42,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 83 transitions. [2020-11-30 00:00:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 00:00:42,113 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:42,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:00:42,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:00:42,114 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:42,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:42,115 INFO L82 PathProgramCache]: Analyzing trace with hash 251507044, now seen corresponding path program 1 times [2020-11-30 00:00:42,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:42,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140383571] [2020-11-30 00:00:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:42,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:42,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140383571] [2020-11-30 00:00:42,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:42,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:42,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094811749] [2020-11-30 00:00:42,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:42,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:42,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:42,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:42,314 INFO L87 Difference]: Start difference. First operand 48 states and 83 transitions. Second operand 4 states. [2020-11-30 00:00:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:42,587 INFO L93 Difference]: Finished difference Result 67 states and 116 transitions. [2020-11-30 00:00:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:42,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-30 00:00:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:42,590 INFO L225 Difference]: With dead ends: 67 [2020-11-30 00:00:42,590 INFO L226 Difference]: Without dead ends: 67 [2020-11-30 00:00:42,590 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 [2020-11-30 00:00:42,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-30 00:00:42,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-11-30 00:00:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-30 00:00:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 115 transitions. [2020-11-30 00:00:42,611 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 115 transitions. Word has length 21 [2020-11-30 00:00:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:42,612 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 115 transitions. [2020-11-30 00:00:42,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 115 transitions. [2020-11-30 00:00:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 00:00:42,614 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:42,614 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] [2020-11-30 00:00:42,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 00:00:42,615 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash 224518530, now seen corresponding path program 1 times [2020-11-30 00:00:42,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:42,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485935018] [2020-11-30 00:00:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:42,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485935018] [2020-11-30 00:00:42,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:42,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:42,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334573498] [2020-11-30 00:00:42,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:42,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:42,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:42,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:42,779 INFO L87 Difference]: Start difference. First operand 66 states and 115 transitions. Second operand 4 states. [2020-11-30 00:00:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:42,980 INFO L93 Difference]: Finished difference Result 70 states and 118 transitions. [2020-11-30 00:00:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:42,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-30 00:00:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:42,983 INFO L225 Difference]: With dead ends: 70 [2020-11-30 00:00:42,983 INFO L226 Difference]: Without dead ends: 70 [2020-11-30 00:00:42,984 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 [2020-11-30 00:00:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-30 00:00:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-11-30 00:00:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-30 00:00:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 117 transitions. [2020-11-30 00:00:43,003 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 117 transitions. Word has length 22 [2020-11-30 00:00:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:43,003 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 117 transitions. [2020-11-30 00:00:43,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 117 transitions. [2020-11-30 00:00:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 00:00:43,005 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:43,005 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] [2020-11-30 00:00:43,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 00:00:43,006 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:43,006 INFO L82 PathProgramCache]: Analyzing trace with hash -786598720, now seen corresponding path program 1 times [2020-11-30 00:00:43,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:43,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718119960] [2020-11-30 00:00:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:43,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:43,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718119960] [2020-11-30 00:00:43,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:43,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:43,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747736311] [2020-11-30 00:00:43,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:43,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:43,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:43,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:43,133 INFO L87 Difference]: Start difference. First operand 69 states and 117 transitions. Second operand 4 states. [2020-11-30 00:00:43,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:43,363 INFO L93 Difference]: Finished difference Result 125 states and 215 transitions. [2020-11-30 00:00:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:43,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-30 00:00:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:43,366 INFO L225 Difference]: With dead ends: 125 [2020-11-30 00:00:43,366 INFO L226 Difference]: Without dead ends: 125 [2020-11-30 00:00:43,367 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 [2020-11-30 00:00:43,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-30 00:00:43,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-11-30 00:00:43,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-11-30 00:00:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 214 transitions. [2020-11-30 00:00:43,398 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 214 transitions. Word has length 22 [2020-11-30 00:00:43,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:43,399 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 214 transitions. [2020-11-30 00:00:43,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:43,399 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 214 transitions. [2020-11-30 00:00:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 00:00:43,400 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:43,400 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] [2020-11-30 00:00:43,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 00:00:43,401 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:43,402 INFO L82 PathProgramCache]: Analyzing trace with hash -199792706, now seen corresponding path program 1 times [2020-11-30 00:00:43,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:43,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254072213] [2020-11-30 00:00:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:43,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:43,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254072213] [2020-11-30 00:00:43,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:43,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:43,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768691333] [2020-11-30 00:00:43,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:43,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:43,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:43,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:43,501 INFO L87 Difference]: Start difference. First operand 124 states and 214 transitions. Second operand 4 states. [2020-11-30 00:00:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:43,667 INFO L93 Difference]: Finished difference Result 157 states and 273 transitions. [2020-11-30 00:00:43,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:43,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-30 00:00:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:43,670 INFO L225 Difference]: With dead ends: 157 [2020-11-30 00:00:43,670 INFO L226 Difference]: Without dead ends: 157 [2020-11-30 00:00:43,670 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 [2020-11-30 00:00:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-11-30 00:00:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 124. [2020-11-30 00:00:43,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-11-30 00:00:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 212 transitions. [2020-11-30 00:00:43,694 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 212 transitions. Word has length 22 [2020-11-30 00:00:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:43,695 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 212 transitions. [2020-11-30 00:00:43,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 212 transitions. [2020-11-30 00:00:43,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 00:00:43,698 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:43,698 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] [2020-11-30 00:00:43,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 00:00:43,699 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:43,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1391871535, now seen corresponding path program 1 times [2020-11-30 00:00:43,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:43,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446046936] [2020-11-30 00:00:43,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:43,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:43,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446046936] [2020-11-30 00:00:43,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:43,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:43,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505238266] [2020-11-30 00:00:43,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:43,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:43,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:43,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:43,788 INFO L87 Difference]: Start difference. First operand 124 states and 212 transitions. Second operand 4 states. [2020-11-30 00:00:44,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:44,015 INFO L93 Difference]: Finished difference Result 225 states and 391 transitions. [2020-11-30 00:00:44,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:44,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-30 00:00:44,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:44,018 INFO L225 Difference]: With dead ends: 225 [2020-11-30 00:00:44,018 INFO L226 Difference]: Without dead ends: 225 [2020-11-30 00:00:44,019 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 [2020-11-30 00:00:44,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-11-30 00:00:44,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2020-11-30 00:00:44,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-11-30 00:00:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 286 transitions. [2020-11-30 00:00:44,042 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 286 transitions. Word has length 23 [2020-11-30 00:00:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:44,044 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 286 transitions. [2020-11-30 00:00:44,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 286 transitions. [2020-11-30 00:00:44,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 00:00:44,049 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:44,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:00:44,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-30 00:00:44,050 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:44,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:44,051 INFO L82 PathProgramCache]: Analyzing trace with hash 805065521, now seen corresponding path program 1 times [2020-11-30 00:00:44,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:44,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845834205] [2020-11-30 00:00:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:44,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:44,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845834205] [2020-11-30 00:00:44,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:44,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:44,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27483622] [2020-11-30 00:00:44,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:44,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:44,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:44,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:44,151 INFO L87 Difference]: Start difference. First operand 168 states and 286 transitions. Second operand 4 states. [2020-11-30 00:00:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:44,374 INFO L93 Difference]: Finished difference Result 233 states and 393 transitions. [2020-11-30 00:00:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:44,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-30 00:00:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:44,377 INFO L225 Difference]: With dead ends: 233 [2020-11-30 00:00:44,378 INFO L226 Difference]: Without dead ends: 233 [2020-11-30 00:00:44,378 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 [2020-11-30 00:00:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-30 00:00:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-11-30 00:00:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-11-30 00:00:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 392 transitions. [2020-11-30 00:00:44,392 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 392 transitions. Word has length 23 [2020-11-30 00:00:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:44,392 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 392 transitions. [2020-11-30 00:00:44,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:44,393 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 392 transitions. [2020-11-30 00:00:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 00:00:44,394 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:44,395 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] [2020-11-30 00:00:44,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-30 00:00:44,395 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:44,396 INFO L82 PathProgramCache]: Analyzing trace with hash 204983275, now seen corresponding path program 1 times [2020-11-30 00:00:44,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:44,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255004382] [2020-11-30 00:00:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:44,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:44,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255004382] [2020-11-30 00:00:44,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:44,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:44,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628818595] [2020-11-30 00:00:44,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:44,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:44,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:44,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:44,487 INFO L87 Difference]: Start difference. First operand 232 states and 392 transitions. Second operand 4 states. [2020-11-30 00:00:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:44,685 INFO L93 Difference]: Finished difference Result 239 states and 397 transitions. [2020-11-30 00:00:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:44,686 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-30 00:00:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:44,688 INFO L225 Difference]: With dead ends: 239 [2020-11-30 00:00:44,689 INFO L226 Difference]: Without dead ends: 239 [2020-11-30 00:00:44,689 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 [2020-11-30 00:00:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-11-30 00:00:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2020-11-30 00:00:44,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-11-30 00:00:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 396 transitions. [2020-11-30 00:00:44,700 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 396 transitions. Word has length 24 [2020-11-30 00:00:44,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:44,700 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 396 transitions. [2020-11-30 00:00:44,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 396 transitions. [2020-11-30 00:00:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 00:00:44,702 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:44,702 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] [2020-11-30 00:00:44,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-30 00:00:44,703 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash -806133975, now seen corresponding path program 1 times [2020-11-30 00:00:44,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:44,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650402263] [2020-11-30 00:00:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:44,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:44,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650402263] [2020-11-30 00:00:44,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:44,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:44,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116683659] [2020-11-30 00:00:44,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:44,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:44,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:44,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:44,771 INFO L87 Difference]: Start difference. First operand 238 states and 396 transitions. Second operand 4 states. [2020-11-30 00:00:44,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:44,987 INFO L93 Difference]: Finished difference Result 427 states and 717 transitions. [2020-11-30 00:00:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:44,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-30 00:00:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:44,992 INFO L225 Difference]: With dead ends: 427 [2020-11-30 00:00:44,992 INFO L226 Difference]: Without dead ends: 427 [2020-11-30 00:00:44,993 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 [2020-11-30 00:00:44,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-11-30 00:00:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 330. [2020-11-30 00:00:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-11-30 00:00:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 540 transitions. [2020-11-30 00:00:45,007 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 540 transitions. Word has length 24 [2020-11-30 00:00:45,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:45,008 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 540 transitions. [2020-11-30 00:00:45,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 540 transitions. [2020-11-30 00:00:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 00:00:45,014 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:45,014 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] [2020-11-30 00:00:45,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-30 00:00:45,015 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:45,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1392939989, now seen corresponding path program 1 times [2020-11-30 00:00:45,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:45,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136211028] [2020-11-30 00:00:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:45,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:45,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136211028] [2020-11-30 00:00:45,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:45,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:45,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007965781] [2020-11-30 00:00:45,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:45,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:45,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:45,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:45,143 INFO L87 Difference]: Start difference. First operand 330 states and 540 transitions. Second operand 4 states. [2020-11-30 00:00:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:45,349 INFO L93 Difference]: Finished difference Result 451 states and 729 transitions. [2020-11-30 00:00:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:45,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-30 00:00:45,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:45,354 INFO L225 Difference]: With dead ends: 451 [2020-11-30 00:00:45,354 INFO L226 Difference]: Without dead ends: 451 [2020-11-30 00:00:45,354 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 [2020-11-30 00:00:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-11-30 00:00:45,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 450. [2020-11-30 00:00:45,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-11-30 00:00:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 728 transitions. [2020-11-30 00:00:45,371 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 728 transitions. Word has length 24 [2020-11-30 00:00:45,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:45,372 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 728 transitions. [2020-11-30 00:00:45,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:45,372 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 728 transitions. [2020-11-30 00:00:45,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-30 00:00:45,374 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:45,374 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] [2020-11-30 00:00:45,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-30 00:00:45,374 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:45,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:45,375 INFO L82 PathProgramCache]: Analyzing trace with hash 786299772, now seen corresponding path program 1 times [2020-11-30 00:00:45,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:45,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058280822] [2020-11-30 00:00:45,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:45,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:45,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058280822] [2020-11-30 00:00:45,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:45,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:45,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969033159] [2020-11-30 00:00:45,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:45,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:45,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:45,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:45,469 INFO L87 Difference]: Start difference. First operand 450 states and 728 transitions. Second operand 4 states. [2020-11-30 00:00:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:45,670 INFO L93 Difference]: Finished difference Result 459 states and 729 transitions. [2020-11-30 00:00:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:45,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-30 00:00:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:45,675 INFO L225 Difference]: With dead ends: 459 [2020-11-30 00:00:45,675 INFO L226 Difference]: Without dead ends: 459 [2020-11-30 00:00:45,675 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 [2020-11-30 00:00:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-11-30 00:00:45,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 458. [2020-11-30 00:00:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-11-30 00:00:45,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 728 transitions. [2020-11-30 00:00:45,695 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 728 transitions. Word has length 25 [2020-11-30 00:00:45,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:45,695 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 728 transitions. [2020-11-30 00:00:45,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:45,695 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 728 transitions. [2020-11-30 00:00:45,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-30 00:00:45,697 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:45,697 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] [2020-11-30 00:00:45,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-30 00:00:45,698 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:45,699 INFO L82 PathProgramCache]: Analyzing trace with hash -224817478, now seen corresponding path program 1 times [2020-11-30 00:00:45,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:45,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782773817] [2020-11-30 00:00:45,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:45,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:45,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782773817] [2020-11-30 00:00:45,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:45,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:45,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707650440] [2020-11-30 00:00:45,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:45,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:45,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:45,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:45,808 INFO L87 Difference]: Start difference. First operand 458 states and 728 transitions. Second operand 4 states. [2020-11-30 00:00:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:46,001 INFO L93 Difference]: Finished difference Result 811 states and 1297 transitions. [2020-11-30 00:00:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:46,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-30 00:00:46,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:46,009 INFO L225 Difference]: With dead ends: 811 [2020-11-30 00:00:46,009 INFO L226 Difference]: Without dead ends: 811 [2020-11-30 00:00:46,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:00:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-11-30 00:00:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 650. [2020-11-30 00:00:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2020-11-30 00:00:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1008 transitions. [2020-11-30 00:00:46,035 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1008 transitions. Word has length 25 [2020-11-30 00:00:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:46,036 INFO L481 AbstractCegarLoop]: Abstraction has 650 states and 1008 transitions. [2020-11-30 00:00:46,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1008 transitions. [2020-11-30 00:00:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-30 00:00:46,038 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:46,038 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] [2020-11-30 00:00:46,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-30 00:00:46,039 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:46,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:46,039 INFO L82 PathProgramCache]: Analyzing trace with hash -811623492, now seen corresponding path program 1 times [2020-11-30 00:00:46,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:46,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221690299] [2020-11-30 00:00:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:46,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:46,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221690299] [2020-11-30 00:00:46,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:46,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:46,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473293997] [2020-11-30 00:00:46,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:46,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:46,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:46,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:46,133 INFO L87 Difference]: Start difference. First operand 650 states and 1008 transitions. Second operand 4 states. [2020-11-30 00:00:46,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:46,336 INFO L93 Difference]: Finished difference Result 875 states and 1337 transitions. [2020-11-30 00:00:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:46,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-30 00:00:46,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:46,344 INFO L225 Difference]: With dead ends: 875 [2020-11-30 00:00:46,344 INFO L226 Difference]: Without dead ends: 875 [2020-11-30 00:00:46,344 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 [2020-11-30 00:00:46,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2020-11-30 00:00:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 874. [2020-11-30 00:00:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-11-30 00:00:46,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1336 transitions. [2020-11-30 00:00:46,377 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1336 transitions. Word has length 25 [2020-11-30 00:00:46,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:46,377 INFO L481 AbstractCegarLoop]: Abstraction has 874 states and 1336 transitions. [2020-11-30 00:00:46,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1336 transitions. [2020-11-30 00:00:46,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 00:00:46,379 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:46,380 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] [2020-11-30 00:00:46,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-30 00:00:46,380 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1627252566, now seen corresponding path program 1 times [2020-11-30 00:00:46,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:46,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628771554] [2020-11-30 00:00:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:46,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:46,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628771554] [2020-11-30 00:00:46,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:46,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:46,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743857128] [2020-11-30 00:00:46,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:46,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:46,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:46,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:46,478 INFO L87 Difference]: Start difference. First operand 874 states and 1336 transitions. Second operand 4 states. [2020-11-30 00:00:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:46,668 INFO L93 Difference]: Finished difference Result 891 states and 1337 transitions. [2020-11-30 00:00:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:46,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-30 00:00:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:46,675 INFO L225 Difference]: With dead ends: 891 [2020-11-30 00:00:46,675 INFO L226 Difference]: Without dead ends: 891 [2020-11-30 00:00:46,678 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 [2020-11-30 00:00:46,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-11-30 00:00:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 890. [2020-11-30 00:00:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2020-11-30 00:00:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1336 transitions. [2020-11-30 00:00:46,710 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1336 transitions. Word has length 26 [2020-11-30 00:00:46,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:46,711 INFO L481 AbstractCegarLoop]: Abstraction has 890 states and 1336 transitions. [2020-11-30 00:00:46,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1336 transitions. [2020-11-30 00:00:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 00:00:46,713 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:46,713 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] [2020-11-30 00:00:46,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-30 00:00:46,714 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:46,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:46,714 INFO L82 PathProgramCache]: Analyzing trace with hash 616135316, now seen corresponding path program 1 times [2020-11-30 00:00:46,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:46,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034646500] [2020-11-30 00:00:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:46,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:46,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034646500] [2020-11-30 00:00:46,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:46,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:46,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294054027] [2020-11-30 00:00:46,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:46,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:46,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:46,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:46,795 INFO L87 Difference]: Start difference. First operand 890 states and 1336 transitions. Second operand 4 states. [2020-11-30 00:00:46,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:46,991 INFO L93 Difference]: Finished difference Result 1547 states and 2329 transitions. [2020-11-30 00:00:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:46,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-30 00:00:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:47,003 INFO L225 Difference]: With dead ends: 1547 [2020-11-30 00:00:47,003 INFO L226 Difference]: Without dead ends: 1547 [2020-11-30 00:00:47,004 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 [2020-11-30 00:00:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-11-30 00:00:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1290. [2020-11-30 00:00:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1290 states. [2020-11-30 00:00:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1880 transitions. [2020-11-30 00:00:47,081 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1880 transitions. Word has length 26 [2020-11-30 00:00:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:47,083 INFO L481 AbstractCegarLoop]: Abstraction has 1290 states and 1880 transitions. [2020-11-30 00:00:47,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1880 transitions. [2020-11-30 00:00:47,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 00:00:47,088 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:47,088 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] [2020-11-30 00:00:47,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-30 00:00:47,089 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:47,090 INFO L82 PathProgramCache]: Analyzing trace with hash 29329302, now seen corresponding path program 1 times [2020-11-30 00:00:47,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:47,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925644879] [2020-11-30 00:00:47,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:47,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:47,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925644879] [2020-11-30 00:00:47,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:47,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:47,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201437660] [2020-11-30 00:00:47,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:47,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:47,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:47,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:47,172 INFO L87 Difference]: Start difference. First operand 1290 states and 1880 transitions. Second operand 4 states. [2020-11-30 00:00:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:47,378 INFO L93 Difference]: Finished difference Result 1707 states and 2441 transitions. [2020-11-30 00:00:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:47,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-30 00:00:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:47,391 INFO L225 Difference]: With dead ends: 1707 [2020-11-30 00:00:47,391 INFO L226 Difference]: Without dead ends: 1707 [2020-11-30 00:00:47,392 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 [2020-11-30 00:00:47,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-11-30 00:00:47,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1706. [2020-11-30 00:00:47,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1706 states. [2020-11-30 00:00:47,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2440 transitions. [2020-11-30 00:00:47,448 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2440 transitions. Word has length 26 [2020-11-30 00:00:47,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:47,448 INFO L481 AbstractCegarLoop]: Abstraction has 1706 states and 2440 transitions. [2020-11-30 00:00:47,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2440 transitions. [2020-11-30 00:00:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 00:00:47,451 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:47,451 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] [2020-11-30 00:00:47,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-30 00:00:47,452 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:47,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1926995975, now seen corresponding path program 1 times [2020-11-30 00:00:47,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:47,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213738919] [2020-11-30 00:00:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:47,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:47,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213738919] [2020-11-30 00:00:47,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:47,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:47,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483025396] [2020-11-30 00:00:47,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:47,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:47,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:47,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:47,518 INFO L87 Difference]: Start difference. First operand 1706 states and 2440 transitions. Second operand 4 states. [2020-11-30 00:00:47,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:47,740 INFO L93 Difference]: Finished difference Result 1739 states and 2441 transitions. [2020-11-30 00:00:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:47,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-30 00:00:47,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:47,753 INFO L225 Difference]: With dead ends: 1739 [2020-11-30 00:00:47,753 INFO L226 Difference]: Without dead ends: 1739 [2020-11-30 00:00:47,753 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 [2020-11-30 00:00:47,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2020-11-30 00:00:47,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1738. [2020-11-30 00:00:47,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2020-11-30 00:00:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2440 transitions. [2020-11-30 00:00:47,808 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2440 transitions. Word has length 27 [2020-11-30 00:00:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:47,809 INFO L481 AbstractCegarLoop]: Abstraction has 1738 states and 2440 transitions. [2020-11-30 00:00:47,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2440 transitions. [2020-11-30 00:00:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 00:00:47,812 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:47,812 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] [2020-11-30 00:00:47,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-30 00:00:47,812 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:47,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:47,813 INFO L82 PathProgramCache]: Analyzing trace with hash 915878725, now seen corresponding path program 1 times [2020-11-30 00:00:47,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:47,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276367533] [2020-11-30 00:00:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:47,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:47,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276367533] [2020-11-30 00:00:47,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:47,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:47,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493838851] [2020-11-30 00:00:47,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:47,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:47,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:47,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:47,874 INFO L87 Difference]: Start difference. First operand 1738 states and 2440 transitions. Second operand 4 states. [2020-11-30 00:00:48,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:48,068 INFO L93 Difference]: Finished difference Result 2955 states and 4137 transitions. [2020-11-30 00:00:48,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:48,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-30 00:00:48,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:48,090 INFO L225 Difference]: With dead ends: 2955 [2020-11-30 00:00:48,090 INFO L226 Difference]: Without dead ends: 2955 [2020-11-30 00:00:48,090 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 [2020-11-30 00:00:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2020-11-30 00:00:48,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2570. [2020-11-30 00:00:48,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2570 states. [2020-11-30 00:00:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 3496 transitions. [2020-11-30 00:00:48,176 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 3496 transitions. Word has length 27 [2020-11-30 00:00:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:48,176 INFO L481 AbstractCegarLoop]: Abstraction has 2570 states and 3496 transitions. [2020-11-30 00:00:48,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 3496 transitions. [2020-11-30 00:00:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 00:00:48,181 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:48,181 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] [2020-11-30 00:00:48,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-30 00:00:48,182 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:48,183 INFO L82 PathProgramCache]: Analyzing trace with hash 329072711, now seen corresponding path program 1 times [2020-11-30 00:00:48,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:48,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536886029] [2020-11-30 00:00:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:48,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:48,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536886029] [2020-11-30 00:00:48,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:48,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:48,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446454277] [2020-11-30 00:00:48,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:48,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:48,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:48,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:48,257 INFO L87 Difference]: Start difference. First operand 2570 states and 3496 transitions. Second operand 4 states. [2020-11-30 00:00:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:48,479 INFO L93 Difference]: Finished difference Result 3339 states and 4425 transitions. [2020-11-30 00:00:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:48,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-30 00:00:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:48,502 INFO L225 Difference]: With dead ends: 3339 [2020-11-30 00:00:48,502 INFO L226 Difference]: Without dead ends: 3339 [2020-11-30 00:00:48,503 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 [2020-11-30 00:00:48,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2020-11-30 00:00:48,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3338. [2020-11-30 00:00:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3338 states. [2020-11-30 00:00:48,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4424 transitions. [2020-11-30 00:00:48,631 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4424 transitions. Word has length 27 [2020-11-30 00:00:48,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:48,631 INFO L481 AbstractCegarLoop]: Abstraction has 3338 states and 4424 transitions. [2020-11-30 00:00:48,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:48,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4424 transitions. [2020-11-30 00:00:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 00:00:48,637 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:48,637 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] [2020-11-30 00:00:48,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-30 00:00:48,639 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:48,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1665849663, now seen corresponding path program 1 times [2020-11-30 00:00:48,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:48,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871700320] [2020-11-30 00:00:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:48,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:48,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871700320] [2020-11-30 00:00:48,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:48,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:48,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088517911] [2020-11-30 00:00:48,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:48,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:48,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:48,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:48,715 INFO L87 Difference]: Start difference. First operand 3338 states and 4424 transitions. Second operand 4 states. [2020-11-30 00:00:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:48,941 INFO L93 Difference]: Finished difference Result 3403 states and 4425 transitions. [2020-11-30 00:00:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:48,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-30 00:00:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:48,964 INFO L225 Difference]: With dead ends: 3403 [2020-11-30 00:00:48,964 INFO L226 Difference]: Without dead ends: 3403 [2020-11-30 00:00:48,964 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 [2020-11-30 00:00:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2020-11-30 00:00:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3402. [2020-11-30 00:00:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3402 states. [2020-11-30 00:00:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 4424 transitions. [2020-11-30 00:00:49,071 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 4424 transitions. Word has length 28 [2020-11-30 00:00:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:49,072 INFO L481 AbstractCegarLoop]: Abstraction has 3402 states and 4424 transitions. [2020-11-30 00:00:49,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:49,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 4424 transitions. [2020-11-30 00:00:49,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 00:00:49,078 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:49,078 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] [2020-11-30 00:00:49,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-30 00:00:49,078 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:49,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:49,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1618000383, now seen corresponding path program 1 times [2020-11-30 00:00:49,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:49,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964232532] [2020-11-30 00:00:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:49,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:49,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964232532] [2020-11-30 00:00:49,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:49,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:49,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96608309] [2020-11-30 00:00:49,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:49,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:49,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:49,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:49,151 INFO L87 Difference]: Start difference. First operand 3402 states and 4424 transitions. Second operand 4 states. [2020-11-30 00:00:49,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:49,359 INFO L93 Difference]: Finished difference Result 5643 states and 7241 transitions. [2020-11-30 00:00:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:49,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-30 00:00:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:49,423 INFO L225 Difference]: With dead ends: 5643 [2020-11-30 00:00:49,423 INFO L226 Difference]: Without dead ends: 5643 [2020-11-30 00:00:49,424 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 [2020-11-30 00:00:49,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2020-11-30 00:00:49,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5130. [2020-11-30 00:00:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5130 states. [2020-11-30 00:00:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 6472 transitions. [2020-11-30 00:00:49,655 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 6472 transitions. Word has length 28 [2020-11-30 00:00:49,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:49,655 INFO L481 AbstractCegarLoop]: Abstraction has 5130 states and 6472 transitions. [2020-11-30 00:00:49,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:49,656 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 6472 transitions. [2020-11-30 00:00:49,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 00:00:49,669 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:49,669 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] [2020-11-30 00:00:49,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-30 00:00:49,670 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:49,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1031194369, now seen corresponding path program 1 times [2020-11-30 00:00:49,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:49,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819397472] [2020-11-30 00:00:49,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:49,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:49,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819397472] [2020-11-30 00:00:49,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:49,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:49,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460333120] [2020-11-30 00:00:49,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:49,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:49,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:49,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:49,753 INFO L87 Difference]: Start difference. First operand 5130 states and 6472 transitions. Second operand 4 states. [2020-11-30 00:00:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:49,974 INFO L93 Difference]: Finished difference Result 6539 states and 7945 transitions. [2020-11-30 00:00:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:49,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-30 00:00:49,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:49,991 INFO L225 Difference]: With dead ends: 6539 [2020-11-30 00:00:49,991 INFO L226 Difference]: Without dead ends: 6539 [2020-11-30 00:00:49,992 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 [2020-11-30 00:00:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2020-11-30 00:00:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6538. [2020-11-30 00:00:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6538 states. [2020-11-30 00:00:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6538 states to 6538 states and 7944 transitions. [2020-11-30 00:00:50,200 INFO L78 Accepts]: Start accepts. Automaton has 6538 states and 7944 transitions. Word has length 28 [2020-11-30 00:00:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:50,201 INFO L481 AbstractCegarLoop]: Abstraction has 6538 states and 7944 transitions. [2020-11-30 00:00:50,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6538 states and 7944 transitions. [2020-11-30 00:00:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-30 00:00:50,212 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:50,212 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] [2020-11-30 00:00:50,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-30 00:00:50,213 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:50,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1374904174, now seen corresponding path program 1 times [2020-11-30 00:00:50,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:50,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534514898] [2020-11-30 00:00:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:50,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:50,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534514898] [2020-11-30 00:00:50,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:50,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:50,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656317288] [2020-11-30 00:00:50,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:50,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:50,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:50,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:50,285 INFO L87 Difference]: Start difference. First operand 6538 states and 7944 transitions. Second operand 4 states. [2020-11-30 00:00:50,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:50,498 INFO L93 Difference]: Finished difference Result 6667 states and 7945 transitions. [2020-11-30 00:00:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:50,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-30 00:00:50,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:50,515 INFO L225 Difference]: With dead ends: 6667 [2020-11-30 00:00:50,515 INFO L226 Difference]: Without dead ends: 6667 [2020-11-30 00:00:50,515 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 [2020-11-30 00:00:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2020-11-30 00:00:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6666. [2020-11-30 00:00:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6666 states. [2020-11-30 00:00:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 7944 transitions. [2020-11-30 00:00:50,740 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 7944 transitions. Word has length 29 [2020-11-30 00:00:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:50,740 INFO L481 AbstractCegarLoop]: Abstraction has 6666 states and 7944 transitions. [2020-11-30 00:00:50,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 7944 transitions. [2020-11-30 00:00:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-30 00:00:50,752 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:50,753 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] [2020-11-30 00:00:50,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-30 00:00:50,753 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:50,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1908945872, now seen corresponding path program 1 times [2020-11-30 00:00:50,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:50,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71251248] [2020-11-30 00:00:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:50,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:50,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71251248] [2020-11-30 00:00:50,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:50,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:50,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088189110] [2020-11-30 00:00:50,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:50,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:50,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:50,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:50,820 INFO L87 Difference]: Start difference. First operand 6666 states and 7944 transitions. Second operand 4 states. [2020-11-30 00:00:51,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:51,036 INFO L93 Difference]: Finished difference Result 10762 states and 12424 transitions. [2020-11-30 00:00:51,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:51,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-30 00:00:51,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:51,063 INFO L225 Difference]: With dead ends: 10762 [2020-11-30 00:00:51,064 INFO L226 Difference]: Without dead ends: 10762 [2020-11-30 00:00:51,064 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 [2020-11-30 00:00:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2020-11-30 00:00:51,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 10250. [2020-11-30 00:00:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10250 states. [2020-11-30 00:00:51,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10250 states to 10250 states and 11912 transitions. [2020-11-30 00:00:51,360 INFO L78 Accepts]: Start accepts. Automaton has 10250 states and 11912 transitions. Word has length 29 [2020-11-30 00:00:51,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:51,361 INFO L481 AbstractCegarLoop]: Abstraction has 10250 states and 11912 transitions. [2020-11-30 00:00:51,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:51,361 INFO L276 IsEmpty]: Start isEmpty. Operand 10250 states and 11912 transitions. [2020-11-30 00:00:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-30 00:00:51,381 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:00:51,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:00:51,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-30 00:00:51,381 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-30 00:00:51,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:00:51,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1322139858, now seen corresponding path program 1 times [2020-11-30 00:00:51,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:00:51,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657792180] [2020-11-30 00:00:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:00:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:51,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:00:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:00:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:00:51,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657792180] [2020-11-30 00:00:51,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:00:51,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:00:51,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443053922] [2020-11-30 00:00:51,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:00:51,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:00:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:00:51,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:00:51,454 INFO L87 Difference]: Start difference. First operand 10250 states and 11912 transitions. Second operand 4 states. [2020-11-30 00:00:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:00:51,680 INFO L93 Difference]: Finished difference Result 12807 states and 14086 transitions. [2020-11-30 00:00:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:00:51,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-30 00:00:51,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:00:51,750 INFO L225 Difference]: With dead ends: 12807 [2020-11-30 00:00:51,750 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 00:00:51,751 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 [2020-11-30 00:00:51,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 00:00:51,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 00:00:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 00:00:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 00:00:51,751 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-11-30 00:00:51,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:00:51,752 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:00:51,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:00:51,752 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 00:00:51,752 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 00:00:51,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-30 00:00:51,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:00:51 BoogieIcfgContainer [2020-11-30 00:00:51,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:00:51,759 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:00:51,760 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:00:51,760 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:00:51,760 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:00:40" (3/4) ... [2020-11-30 00:00:51,764 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 00:00:51,771 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-11-30 00:00:51,771 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-30 00:00:51,775 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-30 00:00:51,785 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-30 00:00:51,786 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 00:00:51,787 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 00:00:51,787 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:00:51,866 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7b4a212e-72b8-4d6d-b7bf-2e62f7cddf98/bin/uautomizer/witness.graphml [2020-11-30 00:00:51,866 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:00:51,868 INFO L168 Benchmark]: Toolchain (without parser) took 12166.50 ms. Allocated memory was 83.9 MB in the beginning and 427.8 MB in the end (delta: 343.9 MB). Free memory was 53.0 MB in the beginning and 339.0 MB in the end (delta: -286.0 MB). Peak memory consumption was 58.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:00:51,869 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 67.1 MB. Free memory was 29.6 MB in the beginning and 29.5 MB in the end (delta: 56.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:00:51,870 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.03 ms. Allocated memory is still 83.9 MB. Free memory was 52.8 MB in the beginning and 62.0 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:00:51,870 INFO L168 Benchmark]: Boogie Preprocessor took 48.16 ms. Allocated memory is still 83.9 MB. Free memory was 62.0 MB in the beginning and 59.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:00:51,871 INFO L168 Benchmark]: RCFGBuilder took 743.27 ms. Allocated memory is still 83.9 MB. Free memory was 59.9 MB in the beginning and 40.6 MB in the end (delta: 19.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-30 00:00:51,873 INFO L168 Benchmark]: TraceAbstraction took 10916.10 ms. Allocated memory was 83.9 MB in the beginning and 427.8 MB in the end (delta: 343.9 MB). Free memory was 40.3 MB in the beginning and 343.2 MB in the end (delta: -302.9 MB). Peak memory consumption was 128.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:00:51,873 INFO L168 Benchmark]: Witness Printer took 106.84 ms. Allocated memory is still 427.8 MB. Free memory was 343.2 MB in the beginning and 339.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:00:51,876 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 67.1 MB. Free memory was 29.6 MB in the beginning and 29.5 MB in the end (delta: 56.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 345.03 ms. Allocated memory is still 83.9 MB. Free memory was 52.8 MB in the beginning and 62.0 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.16 ms. Allocated memory is still 83.9 MB. Free memory was 62.0 MB in the beginning and 59.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 743.27 ms. Allocated memory is still 83.9 MB. Free memory was 59.9 MB in the beginning and 40.6 MB in the end (delta: 19.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10916.10 ms. Allocated memory was 83.9 MB in the beginning and 427.8 MB in the end (delta: 343.9 MB). Free memory was 40.3 MB in the beginning and 343.2 MB in the end (delta: -302.9 MB). Peak memory consumption was 128.1 MB. Max. memory is 16.1 GB. * Witness Printer took 106.84 ms. Allocated memory is still 427.8 MB. Free memory was 343.2 MB in the beginning and 339.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 47 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.8s, OverallIterations: 26, TraceHistogramMax: 1, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2026 SDtfs, 2884 SDslu, 193 SDs, 0 SdLazy, 1413 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 179 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10250occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 26 MinimizatonAttempts, 2049 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 640 NumberOfCodeBlocks, 640 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 614 ConstructedInterpolants, 0 QuantifiedInterpolants, 46238 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 26 InterpolantComputations, 26 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...