./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 8d31f386 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/locks/test_locks_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 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-06 12:05:32,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-06 12:05:32,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-06 12:05:32,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-06 12:05:32,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-06 12:05:32,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-06 12:05:32,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-06 12:05:32,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-06 12:05:32,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-06 12:05:32,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-06 12:05:32,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-06 12:05:32,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-06 12:05:32,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-06 12:05:32,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-06 12:05:32,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-06 12:05:32,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-06 12:05:32,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-06 12:05:32,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-06 12:05:32,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-06 12:05:32,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-06 12:05:32,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-06 12:05:32,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-06 12:05:32,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-06 12:05:32,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-06 12:05:32,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-06 12:05:32,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-06 12:05:32,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-06 12:05:32,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-06 12:05:32,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-06 12:05:32,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-06 12:05:32,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-06 12:05:32,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-06 12:05:32,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-06 12:05:32,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-06 12:05:32,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-06 12:05:32,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-06 12:05:32,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-06 12:05:32,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-06 12:05:32,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-06 12:05:32,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-06 12:05:32,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-06 12:05:32,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-07-06 12:05:32,336 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-06 12:05:32,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-06 12:05:32,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-06 12:05:32,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-06 12:05:32,339 INFO L138 SettingsManager]: * Use SBE=true [2021-07-06 12:05:32,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-06 12:05:32,339 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-06 12:05:32,339 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-07-06 12:05:32,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-06 12:05:32,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-06 12:05:32,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-06 12:05:32,341 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-07-06 12:05:32,341 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-07-06 12:05:32,341 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-07-06 12:05:32,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-06 12:05:32,341 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-07-06 12:05:32,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-06 12:05:32,342 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-06 12:05:32,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-06 12:05:32,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-06 12:05:32,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-06 12:05:32,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 12:05:32,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-06 12:05:32,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-06 12:05:32,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-06 12:05:32,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-06 12:05:32,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-06 12:05:32,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a6bc1adbcafb13db44c5d4b4826990150e2f336 [2021-07-06 12:05:32,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-06 12:05:32,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-06 12:05:32,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-06 12:05:32,610 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-06 12:05:32,611 INFO L275 PluginConnector]: CDTParser initialized [2021-07-06 12:05:32,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_6.c [2021-07-06 12:05:32,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05f1bf82/67a7fdb8ece3442f858d4b706f3c0062/FLAGd2ab86086 [2021-07-06 12:05:32,941 INFO L306 CDTParser]: Found 1 translation units. [2021-07-06 12:05:32,941 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_6.c [2021-07-06 12:05:32,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05f1bf82/67a7fdb8ece3442f858d4b706f3c0062/FLAGd2ab86086 [2021-07-06 12:05:33,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05f1bf82/67a7fdb8ece3442f858d4b706f3c0062 [2021-07-06 12:05:33,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-06 12:05:33,403 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-06 12:05:33,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-06 12:05:33,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-06 12:05:33,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-06 12:05:33,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 12:05:33" (1/1) ... [2021-07-06 12:05:33,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18898a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:33, skipping insertion in model container [2021-07-06 12:05:33,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 12:05:33" (1/1) ... [2021-07-06 12:05:33,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-06 12:05:33,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-06 12:05:33,512 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_6.c[2544,2557] [2021-07-06 12:05:33,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 12:05:33,518 INFO L203 MainTranslator]: Completed pre-run [2021-07-06 12:05:33,530 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_6.c[2544,2557] [2021-07-06 12:05:33,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 12:05:33,542 INFO L208 MainTranslator]: Completed translation [2021-07-06 12:05:33,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:33 WrapperNode [2021-07-06 12:05:33,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-06 12:05:33,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-06 12:05:33,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-06 12:05:33,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-06 12:05:33,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:33" (1/1) ... [2021-07-06 12:05:33,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:33" (1/1) ... [2021-07-06 12:05:33,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:33" (1/1) ... [2021-07-06 12:05:33,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:33" (1/1) ... [2021-07-06 12:05:33,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:33" (1/1) ... [2021-07-06 12:05:33,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:33" (1/1) ... [2021-07-06 12:05:33,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:33" (1/1) ... [2021-07-06 12:05:33,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-06 12:05:33,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-06 12:05:33,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-06 12:05:33,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-06 12:05:33,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:33" (1/1) ... [2021-07-06 12:05:33,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 12:05:33,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 12:05:33,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-07-06 12:05:33,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-07-06 12:05:33,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-07-06 12:05:33,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-06 12:05:33,652 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-07-06 12:05:33,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-07-06 12:05:33,653 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-07-06 12:05:33,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-07-06 12:05:33,653 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-07-06 12:05:33,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-06 12:05:33,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-07-06 12:05:33,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-07-06 12:05:33,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-07-06 12:05:33,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-06 12:05:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-06 12:05:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-06 12:05:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-06 12:05:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-06 12:05:33,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-06 12:05:33,866 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-07-06 12:05:33,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 12:05:33 BoogieIcfgContainer [2021-07-06 12:05:33,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-06 12:05:33,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-06 12:05:33,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-06 12:05:33,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-06 12:05:33,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.07 12:05:33" (1/3) ... [2021-07-06 12:05:33,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e7414bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 12:05:33, skipping insertion in model container [2021-07-06 12:05:33,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 12:05:33" (2/3) ... [2021-07-06 12:05:33,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e7414bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 12:05:33, skipping insertion in model container [2021-07-06 12:05:33,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 12:05:33" (3/3) ... [2021-07-06 12:05:33,882 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2021-07-06 12:05:33,886 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-06 12:05:33,886 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-07-06 12:05:33,933 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr0ASSERT_VIOLATIONMEMORY_LEAK ======== [2021-07-06 12:05:33,939 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 12:05:33,940 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:05:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 12:05:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-06 12:05:33,970 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:33,971 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:33,971 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:33,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:33,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1993066942, now seen corresponding path program 1 times [2021-07-06 12:05:33,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:33,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730818087] [2021-07-06 12:05:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:33,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:34,133 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,134 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:34,143 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:34,192 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:34,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:34,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730818087] [2021-07-06 12:05:34,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730818087] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:34,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:34,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:34,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813043614] [2021-07-06 12:05:34,199 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:34,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:34,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:34,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:34,209 INFO L87 Difference]: Start difference. First operand has 34 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:34,352 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2021-07-06 12:05:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:34,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-07-06 12:05:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:34,359 INFO L225 Difference]: With dead ends: 57 [2021-07-06 12:05:34,359 INFO L226 Difference]: Without dead ends: 49 [2021-07-06 12:05:34,360 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-07-06 12:05:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-07-06 12:05:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2021-07-06 12:05:34,383 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 17 [2021-07-06 12:05:34,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:34,384 INFO L442 AbstractCegarLoop]: Abstraction has 35 states and 58 transitions. [2021-07-06 12:05:34,384 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 58 transitions. [2021-07-06 12:05:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-06 12:05:34,385 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:34,385 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:34,385 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-06 12:05:34,385 INFO L374 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1313008572, now seen corresponding path program 1 times [2021-07-06 12:05:34,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:34,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420041116] [2021-07-06 12:05:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:34,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:34,407 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,408 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:34,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:34,441 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,442 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:34,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:34,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420041116] [2021-07-06 12:05:34,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420041116] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:34,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:34,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:34,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291856961] [2021-07-06 12:05:34,444 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:34,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:34,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:34,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:34,445 INFO L87 Difference]: Start difference. First operand 35 states and 58 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:34,530 INFO L93 Difference]: Finished difference Result 49 states and 79 transitions. [2021-07-06 12:05:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:34,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-07-06 12:05:34,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:34,531 INFO L225 Difference]: With dead ends: 49 [2021-07-06 12:05:34,531 INFO L226 Difference]: Without dead ends: 49 [2021-07-06 12:05:34,532 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:34,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-07-06 12:05:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-07-06 12:05:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.744186046511628) internal successors, (75), 43 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 78 transitions. [2021-07-06 12:05:34,536 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 78 transitions. Word has length 17 [2021-07-06 12:05:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:34,536 INFO L442 AbstractCegarLoop]: Abstraction has 47 states and 78 transitions. [2021-07-06 12:05:34,536 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 78 transitions. [2021-07-06 12:05:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-06 12:05:34,537 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:34,537 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:34,537 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-06 12:05:34,537 INFO L374 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1655318379, now seen corresponding path program 1 times [2021-07-06 12:05:34,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:34,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900249409] [2021-07-06 12:05:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:34,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:34,564 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-06 12:05:34,568 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:34,586 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,586 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:34,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:34,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900249409] [2021-07-06 12:05:34,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900249409] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:34,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:34,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:34,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626618341] [2021-07-06 12:05:34,588 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:34,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:34,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:34,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:34,589 INFO L87 Difference]: Start difference. First operand 47 states and 78 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:34,656 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2021-07-06 12:05:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:34,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-07-06 12:05:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:34,658 INFO L225 Difference]: With dead ends: 52 [2021-07-06 12:05:34,658 INFO L226 Difference]: Without dead ends: 52 [2021-07-06 12:05:34,658 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:34,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-07-06 12:05:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-07-06 12:05:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.673913043478261) internal successors, (77), 46 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 80 transitions. [2021-07-06 12:05:34,662 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 80 transitions. Word has length 18 [2021-07-06 12:05:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:34,662 INFO L442 AbstractCegarLoop]: Abstraction has 50 states and 80 transitions. [2021-07-06 12:05:34,663 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 80 transitions. [2021-07-06 12:05:34,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-06 12:05:34,663 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:34,663 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:34,664 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-06 12:05:34,664 INFO L374 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:34,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:34,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2048345389, now seen corresponding path program 1 times [2021-07-06 12:05:34,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:34,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247211012] [2021-07-06 12:05:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:34,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:34,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:34,682 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:34,702 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,703 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:34,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:34,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247211012] [2021-07-06 12:05:34,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247211012] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:34,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:34,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:34,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416423700] [2021-07-06 12:05:34,705 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:34,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:34,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:34,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:34,705 INFO L87 Difference]: Start difference. First operand 50 states and 80 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:34,774 INFO L93 Difference]: Finished difference Result 89 states and 142 transitions. [2021-07-06 12:05:34,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:34,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-07-06 12:05:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:34,776 INFO L225 Difference]: With dead ends: 89 [2021-07-06 12:05:34,776 INFO L226 Difference]: Without dead ends: 89 [2021-07-06 12:05:34,776 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:34,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-06 12:05:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-07-06 12:05:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.6626506024096386) internal successors, (138), 83 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 141 transitions. [2021-07-06 12:05:34,781 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 141 transitions. Word has length 18 [2021-07-06 12:05:34,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:34,782 INFO L442 AbstractCegarLoop]: Abstraction has 87 states and 141 transitions. [2021-07-06 12:05:34,782 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,782 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 141 transitions. [2021-07-06 12:05:34,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-06 12:05:34,783 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:34,783 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:34,783 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-06 12:05:34,783 INFO L374 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:34,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:34,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1566563537, now seen corresponding path program 1 times [2021-07-06 12:05:34,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:34,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609039843] [2021-07-06 12:05:34,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:34,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:34,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,798 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:34,800 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:34,820 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:34,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:34,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609039843] [2021-07-06 12:05:34,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609039843] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:34,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:34,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:34,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299179758] [2021-07-06 12:05:34,824 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:34,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:34,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:34,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:34,825 INFO L87 Difference]: Start difference. First operand 87 states and 141 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:34,893 INFO L93 Difference]: Finished difference Result 109 states and 176 transitions. [2021-07-06 12:05:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:34,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-07-06 12:05:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:34,894 INFO L225 Difference]: With dead ends: 109 [2021-07-06 12:05:34,895 INFO L226 Difference]: Without dead ends: 109 [2021-07-06 12:05:34,895 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:34,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-06 12:05:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-07-06 12:05:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.6385542168674698) internal successors, (136), 83 states have internal predecessors, (136), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 139 transitions. [2021-07-06 12:05:34,899 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 139 transitions. Word has length 18 [2021-07-06 12:05:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:34,900 INFO L442 AbstractCegarLoop]: Abstraction has 87 states and 139 transitions. [2021-07-06 12:05:34,900 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 139 transitions. [2021-07-06 12:05:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-06 12:05:34,900 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:34,901 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:34,901 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-06 12:05:34,901 INFO L374 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:34,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:34,901 INFO L82 PathProgramCache]: Analyzing trace with hash 926017401, now seen corresponding path program 1 times [2021-07-06 12:05:34,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:34,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155460611] [2021-07-06 12:05:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:34,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:34,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,915 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,915 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:34,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:34,936 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:34,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:34,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:34,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155460611] [2021-07-06 12:05:34,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155460611] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:34,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:34,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:34,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835307636] [2021-07-06 12:05:34,938 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:34,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:34,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:34,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:34,938 INFO L87 Difference]: Start difference. First operand 87 states and 139 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:35,006 INFO L93 Difference]: Finished difference Result 153 states and 246 transitions. [2021-07-06 12:05:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:35,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-07-06 12:05:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:35,007 INFO L225 Difference]: With dead ends: 153 [2021-07-06 12:05:35,007 INFO L226 Difference]: Without dead ends: 153 [2021-07-06 12:05:35,007 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:35,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-06 12:05:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 119. [2021-07-06 12:05:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.617391304347826) internal successors, (186), 115 states have internal predecessors, (186), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 189 transitions. [2021-07-06 12:05:35,019 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 189 transitions. Word has length 19 [2021-07-06 12:05:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:35,020 INFO L442 AbstractCegarLoop]: Abstraction has 119 states and 189 transitions. [2021-07-06 12:05:35,020 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 189 transitions. [2021-07-06 12:05:35,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-06 12:05:35,024 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:35,024 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:35,024 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-06 12:05:35,025 INFO L374 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:35,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1606075771, now seen corresponding path program 1 times [2021-07-06 12:05:35,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:35,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631449779] [2021-07-06 12:05:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:35,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,054 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:35,058 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,084 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,085 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:35,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:35,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631449779] [2021-07-06 12:05:35,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631449779] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:35,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:35,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:35,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798068651] [2021-07-06 12:05:35,088 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:35,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:35,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:35,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:35,091 INFO L87 Difference]: Start difference. First operand 119 states and 189 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:35,152 INFO L93 Difference]: Finished difference Result 161 states and 248 transitions. [2021-07-06 12:05:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:35,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-07-06 12:05:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:35,153 INFO L225 Difference]: With dead ends: 161 [2021-07-06 12:05:35,153 INFO L226 Difference]: Without dead ends: 161 [2021-07-06 12:05:35,154 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:35,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-06 12:05:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-07-06 12:05:35,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.5741935483870968) internal successors, (244), 155 states have internal predecessors, (244), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 247 transitions. [2021-07-06 12:05:35,161 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 247 transitions. Word has length 19 [2021-07-06 12:05:35,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:35,161 INFO L442 AbstractCegarLoop]: Abstraction has 159 states and 247 transitions. [2021-07-06 12:05:35,161 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,161 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 247 transitions. [2021-07-06 12:05:35,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-06 12:05:35,162 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:35,162 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:35,162 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-06 12:05:35,162 INFO L374 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:35,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:35,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1358016280, now seen corresponding path program 1 times [2021-07-06 12:05:35,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:35,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487407633] [2021-07-06 12:05:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:35,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,173 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,173 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,174 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-06 12:05:35,177 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,198 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:35,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:35,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487407633] [2021-07-06 12:05:35,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487407633] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:35,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:35,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:35,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467281390] [2021-07-06 12:05:35,200 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:35,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:35,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:35,201 INFO L87 Difference]: Start difference. First operand 159 states and 247 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:35,266 INFO L93 Difference]: Finished difference Result 167 states and 252 transitions. [2021-07-06 12:05:35,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:35,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-07-06 12:05:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:35,267 INFO L225 Difference]: With dead ends: 167 [2021-07-06 12:05:35,268 INFO L226 Difference]: Without dead ends: 167 [2021-07-06 12:05:35,268 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:35,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-06 12:05:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2021-07-06 12:05:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 161 states have (on average 1.5403726708074534) internal successors, (248), 161 states have internal predecessors, (248), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 251 transitions. [2021-07-06 12:05:35,272 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 251 transitions. Word has length 20 [2021-07-06 12:05:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:35,272 INFO L442 AbstractCegarLoop]: Abstraction has 165 states and 251 transitions. [2021-07-06 12:05:35,272 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 251 transitions. [2021-07-06 12:05:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-06 12:05:35,273 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:35,273 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:35,273 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-06 12:05:35,273 INFO L374 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:35,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:35,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1751043290, now seen corresponding path program 1 times [2021-07-06 12:05:35,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:35,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701998647] [2021-07-06 12:05:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:35,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,283 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,283 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,284 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:35,286 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,312 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:35,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:35,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701998647] [2021-07-06 12:05:35,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701998647] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:35,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:35,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:35,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789748605] [2021-07-06 12:05:35,314 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:35,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:35,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:35,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:35,315 INFO L87 Difference]: Start difference. First operand 165 states and 251 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:35,372 INFO L93 Difference]: Finished difference Result 283 states and 428 transitions. [2021-07-06 12:05:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:35,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-07-06 12:05:35,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:35,374 INFO L225 Difference]: With dead ends: 283 [2021-07-06 12:05:35,374 INFO L226 Difference]: Without dead ends: 283 [2021-07-06 12:05:35,374 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-06 12:05:35,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 233. [2021-07-06 12:05:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 229 states have (on average 1.502183406113537) internal successors, (344), 229 states have internal predecessors, (344), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 347 transitions. [2021-07-06 12:05:35,378 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 347 transitions. Word has length 20 [2021-07-06 12:05:35,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:35,379 INFO L442 AbstractCegarLoop]: Abstraction has 233 states and 347 transitions. [2021-07-06 12:05:35,379 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,379 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 347 transitions. [2021-07-06 12:05:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-06 12:05:35,379 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:35,380 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:35,380 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-06 12:05:35,380 INFO L374 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1070984920, now seen corresponding path program 1 times [2021-07-06 12:05:35,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:35,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26307763] [2021-07-06 12:05:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:35,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,389 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,390 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:35,392 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,393 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,410 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,410 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:35,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:35,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26307763] [2021-07-06 12:05:35,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26307763] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:35,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:35,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:35,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247742606] [2021-07-06 12:05:35,412 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:35,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:35,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:35,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:35,412 INFO L87 Difference]: Start difference. First operand 233 states and 347 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:35,471 INFO L93 Difference]: Finished difference Result 307 states and 440 transitions. [2021-07-06 12:05:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:35,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-07-06 12:05:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:35,472 INFO L225 Difference]: With dead ends: 307 [2021-07-06 12:05:35,472 INFO L226 Difference]: Without dead ends: 307 [2021-07-06 12:05:35,473 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:35,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-07-06 12:05:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2021-07-06 12:05:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 301 states have (on average 1.4485049833887043) internal successors, (436), 301 states have internal predecessors, (436), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 439 transitions. [2021-07-06 12:05:35,477 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 439 transitions. Word has length 20 [2021-07-06 12:05:35,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:35,477 INFO L442 AbstractCegarLoop]: Abstraction has 305 states and 439 transitions. [2021-07-06 12:05:35,478 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,478 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 439 transitions. [2021-07-06 12:05:35,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-06 12:05:35,478 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:35,478 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:35,479 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-06 12:05:35,479 INFO L374 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:35,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:35,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1552448560, now seen corresponding path program 1 times [2021-07-06 12:05:35,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:35,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144855747] [2021-07-06 12:05:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:35,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,488 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,488 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,489 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-06 12:05:35,491 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,491 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,508 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:35,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:35,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144855747] [2021-07-06 12:05:35,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144855747] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:35,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:35,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:35,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376612220] [2021-07-06 12:05:35,509 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:35,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:35,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:35,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:35,510 INFO L87 Difference]: Start difference. First operand 305 states and 439 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:35,564 INFO L93 Difference]: Finished difference Result 315 states and 440 transitions. [2021-07-06 12:05:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:35,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-07-06 12:05:35,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:35,565 INFO L225 Difference]: With dead ends: 315 [2021-07-06 12:05:35,565 INFO L226 Difference]: Without dead ends: 315 [2021-07-06 12:05:35,565 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:35,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-06 12:05:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 313. [2021-07-06 12:05:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 309 states have (on average 1.4110032362459546) internal successors, (436), 309 states have internal predecessors, (436), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 439 transitions. [2021-07-06 12:05:35,570 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 439 transitions. Word has length 21 [2021-07-06 12:05:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:35,570 INFO L442 AbstractCegarLoop]: Abstraction has 313 states and 439 transitions. [2021-07-06 12:05:35,570 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 439 transitions. [2021-07-06 12:05:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-06 12:05:35,571 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:35,571 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:35,571 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-06 12:05:35,571 INFO L374 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:35,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:35,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1159421550, now seen corresponding path program 1 times [2021-07-06 12:05:35,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:35,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815704469] [2021-07-06 12:05:35,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:35,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,580 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,580 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,580 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:35,583 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,583 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,601 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:35,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:35,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815704469] [2021-07-06 12:05:35,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815704469] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:35,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:35,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:35,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782701472] [2021-07-06 12:05:35,602 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:35,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:35,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:35,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:35,603 INFO L87 Difference]: Start difference. First operand 313 states and 439 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:35,663 INFO L93 Difference]: Finished difference Result 523 states and 720 transitions. [2021-07-06 12:05:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-07-06 12:05:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:35,665 INFO L225 Difference]: With dead ends: 523 [2021-07-06 12:05:35,665 INFO L226 Difference]: Without dead ends: 523 [2021-07-06 12:05:35,666 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-07-06 12:05:35,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 457. [2021-07-06 12:05:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 453 states have (on average 1.3686534216335542) internal successors, (620), 453 states have internal predecessors, (620), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 623 transitions. [2021-07-06 12:05:35,672 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 623 transitions. Word has length 21 [2021-07-06 12:05:35,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:35,673 INFO L442 AbstractCegarLoop]: Abstraction has 457 states and 623 transitions. [2021-07-06 12:05:35,673 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,673 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 623 transitions. [2021-07-06 12:05:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-06 12:05:35,674 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:35,674 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:35,674 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-06 12:05:35,674 INFO L374 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:35,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:35,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1839479920, now seen corresponding path program 1 times [2021-07-06 12:05:35,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:35,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033464387] [2021-07-06 12:05:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:35,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,682 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,683 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:35,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,686 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,703 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,703 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:35,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:35,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033464387] [2021-07-06 12:05:35,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033464387] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:35,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:35,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:35,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182202082] [2021-07-06 12:05:35,704 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:35,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:35,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:35,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:35,705 INFO L87 Difference]: Start difference. First operand 457 states and 623 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:35,760 INFO L93 Difference]: Finished difference Result 587 states and 760 transitions. [2021-07-06 12:05:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:35,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-07-06 12:05:35,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:35,762 INFO L225 Difference]: With dead ends: 587 [2021-07-06 12:05:35,762 INFO L226 Difference]: Without dead ends: 587 [2021-07-06 12:05:35,762 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:35,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-07-06 12:05:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 585. [2021-07-06 12:05:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 581 states have (on average 1.3012048192771084) internal successors, (756), 581 states have internal predecessors, (756), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 759 transitions. [2021-07-06 12:05:35,770 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 759 transitions. Word has length 21 [2021-07-06 12:05:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:35,770 INFO L442 AbstractCegarLoop]: Abstraction has 585 states and 759 transitions. [2021-07-06 12:05:35,770 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,770 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 759 transitions. [2021-07-06 12:05:35,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-06 12:05:35,771 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:35,771 INFO L525 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] [2021-07-06 12:05:35,771 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-06 12:05:35,772 INFO L374 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:35,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1582545725, now seen corresponding path program 1 times [2021-07-06 12:05:35,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:35,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560157688] [2021-07-06 12:05:35,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:35,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,780 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,780 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,781 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-06 12:05:35,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:35,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:35,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560157688] [2021-07-06 12:05:35,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560157688] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:35,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:35,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:35,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797285508] [2021-07-06 12:05:35,808 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:35,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:35,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:35,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:35,809 INFO L87 Difference]: Start difference. First operand 585 states and 759 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:35,862 INFO L93 Difference]: Finished difference Result 603 states and 760 transitions. [2021-07-06 12:05:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:35,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-07-06 12:05:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:35,865 INFO L225 Difference]: With dead ends: 603 [2021-07-06 12:05:35,865 INFO L226 Difference]: Without dead ends: 603 [2021-07-06 12:05:35,865 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:35,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-07-06 12:05:35,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2021-07-06 12:05:35,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 597 states have (on average 1.2663316582914572) internal successors, (756), 597 states have internal predecessors, (756), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 759 transitions. [2021-07-06 12:05:35,873 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 759 transitions. Word has length 22 [2021-07-06 12:05:35,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:35,873 INFO L442 AbstractCegarLoop]: Abstraction has 601 states and 759 transitions. [2021-07-06 12:05:35,874 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,874 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 759 transitions. [2021-07-06 12:05:35,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-06 12:05:35,874 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:35,874 INFO L525 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] [2021-07-06 12:05:35,875 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-06 12:05:35,875 INFO L374 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:35,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:35,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1189518715, now seen corresponding path program 1 times [2021-07-06 12:05:35,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:35,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242432408] [2021-07-06 12:05:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:35,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,888 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,889 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:35,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,910 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:35,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:35,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242432408] [2021-07-06 12:05:35,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242432408] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:35,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:35,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:35,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290702734] [2021-07-06 12:05:35,911 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:35,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:35,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:35,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:35,912 INFO L87 Difference]: Start difference. First operand 601 states and 759 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:35,971 INFO L93 Difference]: Finished difference Result 969 states and 1175 transitions. [2021-07-06 12:05:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:35,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-07-06 12:05:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:35,973 INFO L225 Difference]: With dead ends: 969 [2021-07-06 12:05:35,973 INFO L226 Difference]: Without dead ends: 969 [2021-07-06 12:05:35,975 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-07-06 12:05:35,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 905. [2021-07-06 12:05:35,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 901 states have (on average 1.2297447280799112) internal successors, (1108), 901 states have internal predecessors, (1108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1111 transitions. [2021-07-06 12:05:35,987 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1111 transitions. Word has length 22 [2021-07-06 12:05:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:35,987 INFO L442 AbstractCegarLoop]: Abstraction has 905 states and 1111 transitions. [2021-07-06 12:05:35,987 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1111 transitions. [2021-07-06 12:05:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-06 12:05:35,988 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:35,988 INFO L525 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] [2021-07-06 12:05:35,988 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-06 12:05:35,988 INFO L374 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:35,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1869577085, now seen corresponding path program 1 times [2021-07-06 12:05:35,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:35,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285890437] [2021-07-06 12:05:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:35,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:35,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:35,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:35,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 12:05:36,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:36,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:36,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:36,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:36,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:36,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:36,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285890437] [2021-07-06 12:05:36,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285890437] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:36,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:36,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 12:05:36,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067785719] [2021-07-06 12:05:36,025 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 12:05:36,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 12:05:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 12:05:36,026 INFO L87 Difference]: Start difference. First operand 905 states and 1111 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:36,079 INFO L93 Difference]: Finished difference Result 1127 states and 1286 transitions. [2021-07-06 12:05:36,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 12:05:36,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-07-06 12:05:36,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:36,080 INFO L225 Difference]: With dead ends: 1127 [2021-07-06 12:05:36,080 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:05:36,081 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 12:05:36,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:05:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:05:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 12:05:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:05:36,081 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-07-06 12:05:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:36,082 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:05:36,082 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:05:36,082 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:05:36,084 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-06 12:05:36,084 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:05:36,086 INFO L303 ceAbstractionStarter]: Result for error location mainErr0ASSERT_VIOLATIONMEMORY_LEAK was SAFE (1/2) [2021-07-06 12:05:36,090 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr1ENSURES_VIOLATIONMEMORY_LEAK ======== [2021-07-06 12:05:36,092 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 12:05:36,092 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 12:05:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 12:05:36,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-06 12:05:36,093 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 12:05:36,093 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 12:05:36,094 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-07-06 12:05:36,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 12:05:36,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1067342593, now seen corresponding path program 1 times [2021-07-06 12:05:36,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 12:05:36,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303336522] [2021-07-06 12:05:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 12:05:36,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 12:05:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:36,102 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:36,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:36,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:36,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:36,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 12:05:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 12:05:36,118 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 12:05:36,119 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 12:05:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 12:05:36,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 12:05:36,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303336522] [2021-07-06 12:05:36,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303336522] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 12:05:36,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 12:05:36,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 12:05:36,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483093315] [2021-07-06 12:05:36,120 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-06 12:05:36,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 12:05:36,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-06 12:05:36,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 12:05:36,120 INFO L87 Difference]: Start difference. First operand has 34 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 12:05:36,127 INFO L93 Difference]: Finished difference Result 33 states and 50 transitions. [2021-07-06 12:05:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-06 12:05:36,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-07-06 12:05:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 12:05:36,127 INFO L225 Difference]: With dead ends: 33 [2021-07-06 12:05:36,128 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 12:05:36,128 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 12:05:36,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 12:05:36,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 12:05:36,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 12:05:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 12:05:36,128 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2021-07-06 12:05:36,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 12:05:36,128 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 12:05:36,129 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 12:05:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 12:05:36,129 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 12:05:36,130 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-06 12:05:36,130 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 12:05:36,131 INFO L303 ceAbstractionStarter]: Result for error location mainErr1ENSURES_VIOLATIONMEMORY_LEAK was SAFE (2/2) [2021-07-06 12:05:36,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.07 12:05:36 BoogieIcfgContainer [2021-07-06 12:05:36,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-06 12:05:36,134 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-06 12:05:36,134 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-06 12:05:36,134 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-06 12:05:36,134 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 12:05:33" (3/4) ... [2021-07-06 12:05:36,136 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-07-06 12:05:36,139 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-07-06 12:05:36,139 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-07-06 12:05:36,140 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-07-06 12:05:36,142 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-07-06 12:05:36,142 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-07-06 12:05:36,142 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-07-06 12:05:36,142 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-07-06 12:05:36,163 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-06 12:05:36,163 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-06 12:05:36,164 INFO L168 Benchmark]: Toolchain (without parser) took 2760.70 ms. Allocated memory was 58.7 MB in the beginning and 94.4 MB in the end (delta: 35.7 MB). Free memory was 37.7 MB in the beginning and 26.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 46.2 MB. Max. memory is 16.1 GB. [2021-07-06 12:05:36,164 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 58.7 MB. Free memory is still 39.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 12:05:36,164 INFO L168 Benchmark]: CACSL2BoogieTranslator took 138.24 ms. Allocated memory is still 58.7 MB. Free memory was 37.5 MB in the beginning and 43.2 MB in the end (delta: -5.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-07-06 12:05:36,164 INFO L168 Benchmark]: Boogie Preprocessor took 43.94 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 43.2 MB in the beginning and 61.3 MB in the end (delta: -18.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-06 12:05:36,164 INFO L168 Benchmark]: RCFGBuilder took 271.86 ms. Allocated memory is still 77.6 MB. Free memory was 61.3 MB in the beginning and 43.7 MB in the end (delta: 17.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-07-06 12:05:36,165 INFO L168 Benchmark]: TraceAbstraction took 2264.65 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 43.3 MB in the beginning and 30.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 30.5 MB. Max. memory is 16.1 GB. [2021-07-06 12:05:36,165 INFO L168 Benchmark]: Witness Printer took 29.42 ms. Allocated memory is still 94.4 MB. Free memory was 30.0 MB in the beginning and 26.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-07-06 12:05:36,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 58.7 MB. Free memory is still 39.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 138.24 ms. Allocated memory is still 58.7 MB. Free memory was 37.5 MB in the beginning and 43.2 MB in the end (delta: -5.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.94 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 43.2 MB in the beginning and 61.3 MB in the end (delta: -18.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 271.86 ms. Allocated memory is still 77.6 MB. Free memory was 61.3 MB in the beginning and 43.7 MB in the end (delta: 17.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2264.65 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 43.3 MB in the beginning and 30.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 30.5 MB. Max. memory is 16.1 GB. * Witness Printer took 29.42 ms. Allocated memory is still 94.4 MB. Free memory was 30.0 MB in the beginning and 26.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 107]: 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0ASSERT_VIOLATIONMEMORY_LEAK CFG has 4 procedures, 37 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2168.2ms, OverallIterations: 16, TraceHistogramMax: 1, EmptinessCheckTime: 25.2ms, AutomataDifference: 1135.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 878 SDtfs, 1224 SDslu, 100 SDs, 0 SdLazy, 644 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 580.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 552.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=905occurred in iteration=15, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 101.7ms AutomataMinimizationTime, 16 MinimizatonAttempts, 268 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 28.0ms SsaConstructionTime, 101.1ms SatisfiabilityAnalysisTime, 592.4ms InterpolantComputationTime, 315 NumberOfCodeBlocks, 315 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 299 ConstructedInterpolants, 0 QuantifiedInterpolants, 1007 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr1ENSURES_VIOLATIONMEMORY_LEAK CFG has 4 procedures, 37 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 40.3ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.6ms, AutomataDifference: 7.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 49 SDtfs, 43 SDslu, 3 SDs, 0 SdLazy, 3 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 0.4ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7ms SsaConstructionTime, 1.6ms SatisfiabilityAnalysisTime, 20.8ms InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 38 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-07-06 12:05:36,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...