./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/locks/test_locks_6.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a6bc1adbcafb13db44c5d4b4826990150e2f336 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:16:33,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:16:33,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:16:33,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:16:33,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:16:33,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:16:33,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:16:33,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:16:33,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:16:33,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:16:33,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:16:33,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:16:33,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:16:33,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:16:33,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:16:33,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:16:33,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:16:33,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:16:33,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:16:33,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:16:33,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:16:33,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:16:33,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:16:33,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:16:33,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:16:33,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:16:33,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:16:33,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:16:33,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:16:33,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:16:33,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:16:33,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:16:33,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:16:33,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:16:33,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:16:33,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:16:33,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:16:33,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:16:33,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:16:33,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:16:33,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:16:33,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 06:16:33,199 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:16:33,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:16:33,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:16:33,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:16:33,202 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:16:33,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:16:33,202 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:16:33,202 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:16:33,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:16:33,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:16:33,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:16:33,203 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:16:33,204 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:16:33,204 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 06:16:33,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:16:33,204 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:16:33,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:16:33,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:16:33,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:16:33,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:16:33,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:16:33,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:16:33,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:16:33,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:16:33,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:16:33,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:16:33,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:16:33,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:16:33,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a6bc1adbcafb13db44c5d4b4826990150e2f336 [2020-10-20 06:16:33,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:16:33,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:16:33,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:16:33,465 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:16:33,465 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:16:33,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_6.c [2020-10-20 06:16:33,544 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cafa6fb5/8f0a2ad85f274689b6105aba805d9167/FLAG621ee70ef [2020-10-20 06:16:33,988 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:16:33,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_6.c [2020-10-20 06:16:33,999 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cafa6fb5/8f0a2ad85f274689b6105aba805d9167/FLAG621ee70ef [2020-10-20 06:16:34,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cafa6fb5/8f0a2ad85f274689b6105aba805d9167 [2020-10-20 06:16:34,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:16:34,364 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:16:34,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:16:34,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:16:34,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:16:34,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3410db58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34, skipping insertion in model container [2020-10-20 06:16:34,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:16:34,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:16:34,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:16:34,721 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:16:34,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:16:34,762 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:16:34,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34 WrapperNode [2020-10-20 06:16:34,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:16:34,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:16:34,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:16:34,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:16:34,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:16:34,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:16:34,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:16:34,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:16:34,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:16:34,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 06:16:34,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:16:34,880 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-20 06:16:34,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 06:16:34,881 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 06:16:34,882 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-20 06:16:34,882 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-20 06:16:34,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:16:34,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 06:16:34,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 06:16:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 06:16:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:16:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:16:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 06:16:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 06:16:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:16:35,168 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:16:35,168 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-20 06:16:35,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:35 BoogieIcfgContainer [2020-10-20 06:16:35,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:16:35,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:16:35,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:16:35,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:16:35,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:16:34" (1/3) ... [2020-10-20 06:16:35,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0ce9ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:16:35, skipping insertion in model container [2020-10-20 06:16:35,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (2/3) ... [2020-10-20 06:16:35,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0ce9ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:16:35, skipping insertion in model container [2020-10-20 06:16:35,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:35" (3/3) ... [2020-10-20 06:16:35,180 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-10-20 06:16:35,204 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:16:35,213 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 06:16:35,233 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 06:16:35,265 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:16:35,265 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 06:16:35,265 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:16:35,266 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:16:35,266 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:16:35,266 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:16:35,267 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:16:35,267 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:16:35,290 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-20 06:16:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 06:16:35,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:35,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:35,304 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:35,311 INFO L82 PathProgramCache]: Analyzing trace with hash -214899584, now seen corresponding path program 1 times [2020-10-20 06:16:35,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:35,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153112557] [2020-10-20 06:16:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:35,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153112557] [2020-10-20 06:16:35,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:35,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:16:35,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578953006] [2020-10-20 06:16:35,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:16:35,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:35,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:16:35,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:16:35,592 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-20 06:16:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:35,643 INFO L93 Difference]: Finished difference Result 34 states and 51 transitions. [2020-10-20 06:16:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:16:35,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-20 06:16:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:35,656 INFO L225 Difference]: With dead ends: 34 [2020-10-20 06:16:35,657 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 06:16:35,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:16:35,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 06:16:35,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 06:16:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 06:16:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 46 transitions. [2020-10-20 06:16:35,695 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 46 transitions. Word has length 9 [2020-10-20 06:16:35,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:35,695 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 46 transitions. [2020-10-20 06:16:35,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:16:35,695 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 46 transitions. [2020-10-20 06:16:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 06:16:35,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:35,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:35,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:16:35,697 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:35,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2113178603, now seen corresponding path program 1 times [2020-10-20 06:16:35,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:35,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845738336] [2020-10-20 06:16:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:35,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845738336] [2020-10-20 06:16:35,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:35,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:35,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670740398] [2020-10-20 06:16:35,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:35,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:35,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:35,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:35,824 INFO L87 Difference]: Start difference. First operand 29 states and 46 transitions. Second operand 4 states. [2020-10-20 06:16:35,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:35,972 INFO L93 Difference]: Finished difference Result 49 states and 82 transitions. [2020-10-20 06:16:35,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:35,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-20 06:16:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:35,976 INFO L225 Difference]: With dead ends: 49 [2020-10-20 06:16:35,976 INFO L226 Difference]: Without dead ends: 49 [2020-10-20 06:16:35,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:35,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-20 06:16:35,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-10-20 06:16:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-20 06:16:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 59 transitions. [2020-10-20 06:16:35,985 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 59 transitions. Word has length 18 [2020-10-20 06:16:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:35,986 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 59 transitions. [2020-10-20 06:16:35,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 59 transitions. [2020-10-20 06:16:35,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 06:16:35,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:35,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:35,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:16:35,988 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:35,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:35,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1788761683, now seen corresponding path program 1 times [2020-10-20 06:16:35,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:35,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322788974] [2020-10-20 06:16:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:36,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322788974] [2020-10-20 06:16:36,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:36,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:36,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753797962] [2020-10-20 06:16:36,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:36,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:36,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:36,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:36,093 INFO L87 Difference]: Start difference. First operand 36 states and 59 transitions. Second operand 4 states. [2020-10-20 06:16:36,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:36,231 INFO L93 Difference]: Finished difference Result 49 states and 80 transitions. [2020-10-20 06:16:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:36,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-20 06:16:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:36,233 INFO L225 Difference]: With dead ends: 49 [2020-10-20 06:16:36,233 INFO L226 Difference]: Without dead ends: 49 [2020-10-20 06:16:36,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:36,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-20 06:16:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-20 06:16:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-20 06:16:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 79 transitions. [2020-10-20 06:16:36,242 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 79 transitions. Word has length 18 [2020-10-20 06:16:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:36,243 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 79 transitions. [2020-10-20 06:16:36,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 79 transitions. [2020-10-20 06:16:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 06:16:36,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:36,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:36,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 06:16:36,245 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:36,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:36,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1077379613, now seen corresponding path program 1 times [2020-10-20 06:16:36,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:36,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497596496] [2020-10-20 06:16:36,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:36,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497596496] [2020-10-20 06:16:36,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:36,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:36,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23980785] [2020-10-20 06:16:36,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:36,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:36,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:36,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:36,336 INFO L87 Difference]: Start difference. First operand 48 states and 79 transitions. Second operand 4 states. [2020-10-20 06:16:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:36,495 INFO L93 Difference]: Finished difference Result 52 states and 82 transitions. [2020-10-20 06:16:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:36,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-20 06:16:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:36,497 INFO L225 Difference]: With dead ends: 52 [2020-10-20 06:16:36,497 INFO L226 Difference]: Without dead ends: 52 [2020-10-20 06:16:36,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-20 06:16:36,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-20 06:16:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-20 06:16:36,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 81 transitions. [2020-10-20 06:16:36,510 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 81 transitions. Word has length 19 [2020-10-20 06:16:36,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:36,511 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 81 transitions. [2020-10-20 06:16:36,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:36,511 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 81 transitions. [2020-10-20 06:16:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 06:16:36,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:36,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:36,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 06:16:36,515 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:36,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:36,516 INFO L82 PathProgramCache]: Analyzing trace with hash -376315035, now seen corresponding path program 1 times [2020-10-20 06:16:36,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:36,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329811267] [2020-10-20 06:16:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:36,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329811267] [2020-10-20 06:16:36,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:36,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:36,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204031038] [2020-10-20 06:16:36,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:36,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:36,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:36,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:36,637 INFO L87 Difference]: Start difference. First operand 51 states and 81 transitions. Second operand 4 states. [2020-10-20 06:16:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:36,750 INFO L93 Difference]: Finished difference Result 89 states and 143 transitions. [2020-10-20 06:16:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:36,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-20 06:16:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:36,752 INFO L225 Difference]: With dead ends: 89 [2020-10-20 06:16:36,753 INFO L226 Difference]: Without dead ends: 89 [2020-10-20 06:16:36,753 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 [2020-10-20 06:16:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-20 06:16:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-20 06:16:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-20 06:16:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 142 transitions. [2020-10-20 06:16:36,762 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 142 transitions. Word has length 19 [2020-10-20 06:16:36,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:36,763 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 142 transitions. [2020-10-20 06:16:36,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 142 transitions. [2020-10-20 06:16:36,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 06:16:36,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:36,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:36,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 06:16:36,765 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash 16711975, now seen corresponding path program 1 times [2020-10-20 06:16:36,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:36,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094345565] [2020-10-20 06:16:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:36,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094345565] [2020-10-20 06:16:36,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:36,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:36,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170468727] [2020-10-20 06:16:36,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:36,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:36,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:36,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:36,829 INFO L87 Difference]: Start difference. First operand 88 states and 142 transitions. Second operand 4 states. [2020-10-20 06:16:36,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:36,936 INFO L93 Difference]: Finished difference Result 109 states and 177 transitions. [2020-10-20 06:16:36,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:36,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-20 06:16:36,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:36,938 INFO L225 Difference]: With dead ends: 109 [2020-10-20 06:16:36,939 INFO L226 Difference]: Without dead ends: 109 [2020-10-20 06:16:36,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-20 06:16:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2020-10-20 06:16:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-20 06:16:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 140 transitions. [2020-10-20 06:16:36,948 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 140 transitions. Word has length 19 [2020-10-20 06:16:36,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:36,949 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 140 transitions. [2020-10-20 06:16:36,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 140 transitions. [2020-10-20 06:16:36,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 06:16:36,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:36,951 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] [2020-10-20 06:16:36,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 06:16:36,951 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:36,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:36,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1225794014, now seen corresponding path program 1 times [2020-10-20 06:16:36,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:36,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403196828] [2020-10-20 06:16:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:37,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403196828] [2020-10-20 06:16:37,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:37,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:37,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088083358] [2020-10-20 06:16:37,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:37,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:37,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:37,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:37,070 INFO L87 Difference]: Start difference. First operand 88 states and 140 transitions. Second operand 4 states. [2020-10-20 06:16:37,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:37,191 INFO L93 Difference]: Finished difference Result 153 states and 247 transitions. [2020-10-20 06:16:37,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:37,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-20 06:16:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:37,194 INFO L225 Difference]: With dead ends: 153 [2020-10-20 06:16:37,195 INFO L226 Difference]: Without dead ends: 153 [2020-10-20 06:16:37,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:37,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-20 06:16:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2020-10-20 06:16:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-20 06:16:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 190 transitions. [2020-10-20 06:16:37,218 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 190 transitions. Word has length 20 [2020-10-20 06:16:37,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:37,219 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 190 transitions. [2020-10-20 06:16:37,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:37,219 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 190 transitions. [2020-10-20 06:16:37,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 06:16:37,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:37,221 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] [2020-10-20 06:16:37,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 06:16:37,222 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:37,222 INFO L82 PathProgramCache]: Analyzing trace with hash 832767004, now seen corresponding path program 1 times [2020-10-20 06:16:37,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:37,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881324495] [2020-10-20 06:16:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:37,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881324495] [2020-10-20 06:16:37,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:37,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:37,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286706841] [2020-10-20 06:16:37,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:37,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:37,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:37,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:37,289 INFO L87 Difference]: Start difference. First operand 120 states and 190 transitions. Second operand 4 states. [2020-10-20 06:16:37,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:37,386 INFO L93 Difference]: Finished difference Result 161 states and 249 transitions. [2020-10-20 06:16:37,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:37,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-20 06:16:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:37,388 INFO L225 Difference]: With dead ends: 161 [2020-10-20 06:16:37,388 INFO L226 Difference]: Without dead ends: 161 [2020-10-20 06:16:37,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-20 06:16:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-20 06:16:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-20 06:16:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 248 transitions. [2020-10-20 06:16:37,413 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 248 transitions. Word has length 20 [2020-10-20 06:16:37,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:37,413 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 248 transitions. [2020-10-20 06:16:37,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:37,414 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 248 transitions. [2020-10-20 06:16:37,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:16:37,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:37,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:37,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 06:16:37,416 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:37,417 INFO L82 PathProgramCache]: Analyzing trace with hash -648422448, now seen corresponding path program 1 times [2020-10-20 06:16:37,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:37,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894535812] [2020-10-20 06:16:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:37,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894535812] [2020-10-20 06:16:37,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:37,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:37,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64589393] [2020-10-20 06:16:37,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:37,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:37,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:37,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:37,474 INFO L87 Difference]: Start difference. First operand 160 states and 248 transitions. Second operand 4 states. [2020-10-20 06:16:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:37,567 INFO L93 Difference]: Finished difference Result 167 states and 253 transitions. [2020-10-20 06:16:37,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:37,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-20 06:16:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:37,569 INFO L225 Difference]: With dead ends: 167 [2020-10-20 06:16:37,569 INFO L226 Difference]: Without dead ends: 167 [2020-10-20 06:16:37,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:37,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-20 06:16:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-20 06:16:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-20 06:16:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 252 transitions. [2020-10-20 06:16:37,577 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 252 transitions. Word has length 21 [2020-10-20 06:16:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:37,577 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 252 transitions. [2020-10-20 06:16:37,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 252 transitions. [2020-10-20 06:16:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:16:37,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:37,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:37,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 06:16:37,595 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:37,596 INFO L82 PathProgramCache]: Analyzing trace with hash 52642130, now seen corresponding path program 1 times [2020-10-20 06:16:37,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:37,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336766863] [2020-10-20 06:16:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:37,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336766863] [2020-10-20 06:16:37,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:37,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:37,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915411870] [2020-10-20 06:16:37,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:37,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:37,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:37,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:37,646 INFO L87 Difference]: Start difference. First operand 166 states and 252 transitions. Second operand 4 states. [2020-10-20 06:16:37,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:37,732 INFO L93 Difference]: Finished difference Result 283 states and 429 transitions. [2020-10-20 06:16:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:37,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-20 06:16:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:37,734 INFO L225 Difference]: With dead ends: 283 [2020-10-20 06:16:37,735 INFO L226 Difference]: Without dead ends: 283 [2020-10-20 06:16:37,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-20 06:16:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 234. [2020-10-20 06:16:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-20 06:16:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 348 transitions. [2020-10-20 06:16:37,743 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 348 transitions. Word has length 21 [2020-10-20 06:16:37,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:37,743 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 348 transitions. [2020-10-20 06:16:37,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 348 transitions. [2020-10-20 06:16:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:16:37,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:37,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:37,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 06:16:37,746 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:37,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:37,747 INFO L82 PathProgramCache]: Analyzing trace with hash -340384880, now seen corresponding path program 1 times [2020-10-20 06:16:37,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:37,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706848451] [2020-10-20 06:16:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:37,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706848451] [2020-10-20 06:16:37,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:37,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:37,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039904121] [2020-10-20 06:16:37,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:37,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:37,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:37,799 INFO L87 Difference]: Start difference. First operand 234 states and 348 transitions. Second operand 4 states. [2020-10-20 06:16:37,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:37,894 INFO L93 Difference]: Finished difference Result 307 states and 441 transitions. [2020-10-20 06:16:37,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:37,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-20 06:16:37,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:37,897 INFO L225 Difference]: With dead ends: 307 [2020-10-20 06:16:37,897 INFO L226 Difference]: Without dead ends: 307 [2020-10-20 06:16:37,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-20 06:16:37,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2020-10-20 06:16:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-20 06:16:37,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 440 transitions. [2020-10-20 06:16:37,906 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 440 transitions. Word has length 21 [2020-10-20 06:16:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:37,907 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 440 transitions. [2020-10-20 06:16:37,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 440 transitions. [2020-10-20 06:16:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 06:16:37,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:37,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:37,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-20 06:16:37,910 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:37,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1638585383, now seen corresponding path program 1 times [2020-10-20 06:16:37,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:37,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784631438] [2020-10-20 06:16:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:37,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784631438] [2020-10-20 06:16:37,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:37,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:37,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103618450] [2020-10-20 06:16:37,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:37,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:37,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:37,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:37,966 INFO L87 Difference]: Start difference. First operand 306 states and 440 transitions. Second operand 4 states. [2020-10-20 06:16:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:38,053 INFO L93 Difference]: Finished difference Result 315 states and 441 transitions. [2020-10-20 06:16:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:38,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-20 06:16:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:38,055 INFO L225 Difference]: With dead ends: 315 [2020-10-20 06:16:38,055 INFO L226 Difference]: Without dead ends: 315 [2020-10-20 06:16:38,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:38,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-20 06:16:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2020-10-20 06:16:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-20 06:16:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 440 transitions. [2020-10-20 06:16:38,064 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 440 transitions. Word has length 22 [2020-10-20 06:16:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:38,064 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 440 transitions. [2020-10-20 06:16:38,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 440 transitions. [2020-10-20 06:16:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 06:16:38,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:38,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:38,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-20 06:16:38,067 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:38,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:38,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1955317335, now seen corresponding path program 1 times [2020-10-20 06:16:38,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:38,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038330774] [2020-10-20 06:16:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:38,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:38,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038330774] [2020-10-20 06:16:38,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:38,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:38,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160404970] [2020-10-20 06:16:38,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:38,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:38,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:38,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:38,113 INFO L87 Difference]: Start difference. First operand 314 states and 440 transitions. Second operand 4 states. [2020-10-20 06:16:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:38,217 INFO L93 Difference]: Finished difference Result 523 states and 721 transitions. [2020-10-20 06:16:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:38,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-20 06:16:38,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:38,223 INFO L225 Difference]: With dead ends: 523 [2020-10-20 06:16:38,223 INFO L226 Difference]: Without dead ends: 523 [2020-10-20 06:16:38,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:38,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-20 06:16:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 458. [2020-10-20 06:16:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-20 06:16:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 624 transitions. [2020-10-20 06:16:38,234 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 624 transitions. Word has length 22 [2020-10-20 06:16:38,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:38,234 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 624 transitions. [2020-10-20 06:16:38,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:38,234 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 624 transitions. [2020-10-20 06:16:38,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 06:16:38,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:38,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:38,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-20 06:16:38,236 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:38,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1946622951, now seen corresponding path program 1 times [2020-10-20 06:16:38,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:38,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010606215] [2020-10-20 06:16:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:38,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:38,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010606215] [2020-10-20 06:16:38,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:38,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:38,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981888794] [2020-10-20 06:16:38,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:38,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:38,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:38,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:38,278 INFO L87 Difference]: Start difference. First operand 458 states and 624 transitions. Second operand 4 states. [2020-10-20 06:16:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:38,386 INFO L93 Difference]: Finished difference Result 587 states and 761 transitions. [2020-10-20 06:16:38,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:38,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-20 06:16:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:38,390 INFO L225 Difference]: With dead ends: 587 [2020-10-20 06:16:38,390 INFO L226 Difference]: Without dead ends: 587 [2020-10-20 06:16:38,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-20 06:16:38,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 586. [2020-10-20 06:16:38,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-20 06:16:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 760 transitions. [2020-10-20 06:16:38,410 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 760 transitions. Word has length 22 [2020-10-20 06:16:38,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:38,410 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 760 transitions. [2020-10-20 06:16:38,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 760 transitions. [2020-10-20 06:16:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 06:16:38,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:38,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:38,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-20 06:16:38,414 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:38,415 INFO L82 PathProgramCache]: Analyzing trace with hash -478605317, now seen corresponding path program 1 times [2020-10-20 06:16:38,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:38,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420608675] [2020-10-20 06:16:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:38,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:38,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420608675] [2020-10-20 06:16:38,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:38,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307993164] [2020-10-20 06:16:38,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:38,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:38,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:38,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:38,479 INFO L87 Difference]: Start difference. First operand 586 states and 760 transitions. Second operand 4 states. [2020-10-20 06:16:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:38,582 INFO L93 Difference]: Finished difference Result 603 states and 761 transitions. [2020-10-20 06:16:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:38,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-20 06:16:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:38,587 INFO L225 Difference]: With dead ends: 603 [2020-10-20 06:16:38,587 INFO L226 Difference]: Without dead ends: 603 [2020-10-20 06:16:38,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-20 06:16:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 602. [2020-10-20 06:16:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-10-20 06:16:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 760 transitions. [2020-10-20 06:16:38,602 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 760 transitions. Word has length 23 [2020-10-20 06:16:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:38,603 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 760 transitions. [2020-10-20 06:16:38,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 760 transitions. [2020-10-20 06:16:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 06:16:38,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:38,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:38,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-20 06:16:38,605 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:38,605 INFO L82 PathProgramCache]: Analyzing trace with hash 222459261, now seen corresponding path program 1 times [2020-10-20 06:16:38,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:38,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885434671] [2020-10-20 06:16:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:38,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:38,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885434671] [2020-10-20 06:16:38,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:38,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:38,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933685910] [2020-10-20 06:16:38,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:38,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:38,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:38,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:38,647 INFO L87 Difference]: Start difference. First operand 602 states and 760 transitions. Second operand 4 states. [2020-10-20 06:16:38,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:38,746 INFO L93 Difference]: Finished difference Result 970 states and 1176 transitions. [2020-10-20 06:16:38,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:38,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-20 06:16:38,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:38,752 INFO L225 Difference]: With dead ends: 970 [2020-10-20 06:16:38,752 INFO L226 Difference]: Without dead ends: 970 [2020-10-20 06:16:38,753 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 [2020-10-20 06:16:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-10-20 06:16:38,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 906. [2020-10-20 06:16:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 906 states. [2020-10-20 06:16:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1112 transitions. [2020-10-20 06:16:38,785 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1112 transitions. Word has length 23 [2020-10-20 06:16:38,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:38,785 INFO L481 AbstractCegarLoop]: Abstraction has 906 states and 1112 transitions. [2020-10-20 06:16:38,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:38,786 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1112 transitions. [2020-10-20 06:16:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 06:16:38,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:38,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:38,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-20 06:16:38,789 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:38,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:38,789 INFO L82 PathProgramCache]: Analyzing trace with hash -170567749, now seen corresponding path program 1 times [2020-10-20 06:16:38,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:38,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512826473] [2020-10-20 06:16:38,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:38,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:38,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512826473] [2020-10-20 06:16:38,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:38,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:38,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519778348] [2020-10-20 06:16:38,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:38,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:38,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:38,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:38,833 INFO L87 Difference]: Start difference. First operand 906 states and 1112 transitions. Second operand 4 states. [2020-10-20 06:16:38,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:38,922 INFO L93 Difference]: Finished difference Result 1127 states and 1286 transitions. [2020-10-20 06:16:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:38,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-20 06:16:38,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:38,923 INFO L225 Difference]: With dead ends: 1127 [2020-10-20 06:16:38,923 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 06:16:38,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 06:16:38,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 06:16:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 06:16:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 06:16:38,924 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-10-20 06:16:38,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:38,924 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:16:38,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:38,924 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:16:38,925 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 06:16:38,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-20 06:16:38,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:16:38 BoogieIcfgContainer [2020-10-20 06:16:38,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:16:38,932 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:16:38,932 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:16:38,933 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:16:38,933 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:35" (3/4) ... [2020-10-20 06:16:38,937 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 06:16:38,944 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-20 06:16:38,945 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-20 06:16:38,945 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-20 06:16:38,951 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-20 06:16:38,952 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 06:16:38,952 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 06:16:38,952 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 06:16:39,006 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:16:39,007 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:16:39,009 INFO L168 Benchmark]: Toolchain (without parser) took 4649.48 ms. Allocated memory was 33.6 MB in the beginning and 68.7 MB in the end (delta: 35.1 MB). Free memory was 10.9 MB in the beginning and 12.7 MB in the end (delta: -1.8 MB). Peak memory consumption was 33.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:39,010 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 33.0 MB. Free memory was 17.8 MB in the beginning and 17.8 MB in the end (delta: 41.5 kB). Peak memory consumption was 41.5 kB. Max. memory is 14.3 GB. [2020-10-20 06:16:39,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 395.47 ms. Allocated memory was 33.6 MB in the beginning and 43.0 MB in the end (delta: 9.4 MB). Free memory was 10.0 MB in the beginning and 22.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:39,011 INFO L168 Benchmark]: Boogie Preprocessor took 35.63 ms. Allocated memory is still 43.0 MB. Free memory was 22.2 MB in the beginning and 20.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:39,011 INFO L168 Benchmark]: RCFGBuilder took 371.71 ms. Allocated memory was 43.0 MB in the beginning and 44.0 MB in the end (delta: 1.0 MB). Free memory was 20.2 MB in the beginning and 12.3 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:39,012 INFO L168 Benchmark]: TraceAbstraction took 3759.83 ms. Allocated memory was 44.0 MB in the beginning and 68.7 MB in the end (delta: 24.6 MB). Free memory was 11.9 MB in the beginning and 17.4 MB in the end (delta: -5.5 MB). Peak memory consumption was 19.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:39,012 INFO L168 Benchmark]: Witness Printer took 74.61 ms. Allocated memory is still 68.7 MB. Free memory was 17.4 MB in the beginning and 12.7 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:39,014 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 33.0 MB. Free memory was 17.8 MB in the beginning and 17.8 MB in the end (delta: 41.5 kB). Peak memory consumption was 41.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 395.47 ms. Allocated memory was 33.6 MB in the beginning and 43.0 MB in the end (delta: 9.4 MB). Free memory was 10.0 MB in the beginning and 22.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 35.63 ms. Allocated memory is still 43.0 MB. Free memory was 22.2 MB in the beginning and 20.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * RCFGBuilder took 371.71 ms. Allocated memory was 43.0 MB in the beginning and 44.0 MB in the end (delta: 1.0 MB). Free memory was 20.2 MB in the beginning and 12.3 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 3759.83 ms. Allocated memory was 44.0 MB in the beginning and 68.7 MB in the end (delta: 24.6 MB). Free memory was 11.9 MB in the beginning and 17.4 MB in the end (delta: -5.5 MB). Peak memory consumption was 19.1 MB. Max. memory is 14.3 GB. * Witness Printer took 74.61 ms. Allocated memory is still 68.7 MB. Free memory was 17.4 MB in the beginning and 12.7 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 14.3 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, 38 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 934 SDtfs, 1243 SDslu, 124 SDs, 0 SdLazy, 642 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=906occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 254 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 340 NumberOfCodeBlocks, 340 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 323 ConstructedInterpolants, 0 QuantifiedInterpolants, 20501 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 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...