./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_7.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/locks/test_locks_7.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 d2a1f90505878c0035f7701a954d17ca4375eb05 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:16:40,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:16:40,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:16:40,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:16:40,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:16:40,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:16:40,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:16:40,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:16:40,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:16:40,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:16:40,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:16:40,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:16:40,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:16:40,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:16:40,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:16:40,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:16:40,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:16:40,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:16:40,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:16:40,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:16:40,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:16:40,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:16:40,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:16:40,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:16:40,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:16:40,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:16:40,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:16:40,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:16:40,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:16:40,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:16:40,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:16:40,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:16:40,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:16:40,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:16:40,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:16:40,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:16:40,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:16:40,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:16:40,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:16:40,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:16:40,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:16:40,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 06:16:40,455 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:16:40,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:16:40,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:16:40,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:16:40,458 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:16:40,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:16:40,459 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:16:40,459 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:16:40,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:16:40,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:16:40,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:16:40,461 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:16:40,461 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:16:40,462 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 06:16:40,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:16:40,462 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:16:40,463 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:16:40,463 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:16:40,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:16:40,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:16:40,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:16:40,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:16:40,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:16:40,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:16:40,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:16:40,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:16:40,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:16:40,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:16:40,470 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a1f90505878c0035f7701a954d17ca4375eb05 [2020-10-20 06:16:40,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:16:40,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:16:40,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:16:40,694 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:16:40,694 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:16:40,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_7.c [2020-10-20 06:16:40,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1596ffba1/21b281f638074713a20d9b48158efb67/FLAG1b98409ed [2020-10-20 06:16:41,228 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:16:41,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_7.c [2020-10-20 06:16:41,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1596ffba1/21b281f638074713a20d9b48158efb67/FLAG1b98409ed [2020-10-20 06:16:41,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1596ffba1/21b281f638074713a20d9b48158efb67 [2020-10-20 06:16:41,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:16:41,605 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:16:41,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:16:41,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:16:41,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:16:41,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:16:41" (1/1) ... [2020-10-20 06:16:41,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@313cfca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:41, skipping insertion in model container [2020-10-20 06:16:41,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:16:41" (1/1) ... [2020-10-20 06:16:41,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:16:41,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:16:41,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:16:41,955 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:16:41,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:16:41,992 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:16:41,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:41 WrapperNode [2020-10-20 06:16:41,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:16:41,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:16:41,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:16:41,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:16:42,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:41" (1/1) ... [2020-10-20 06:16:42,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:41" (1/1) ... [2020-10-20 06:16:42,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:41" (1/1) ... [2020-10-20 06:16:42,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:41" (1/1) ... [2020-10-20 06:16:42,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:41" (1/1) ... [2020-10-20 06:16:42,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:41" (1/1) ... [2020-10-20 06:16:42,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:41" (1/1) ... [2020-10-20 06:16:42,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:16:42,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:16:42,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:16:42,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:16:42,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:16:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 06:16:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:16:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-20 06:16:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 06:16:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 06:16:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-20 06:16:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-20 06:16:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:16:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 06:16:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 06:16:42,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 06:16:42,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:16:42,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:16:42,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 06:16:42,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 06:16:42,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:16:42,402 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:16:42,403 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-20 06:16:42,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:42 BoogieIcfgContainer [2020-10-20 06:16:42,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:16:42,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:16:42,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:16:42,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:16:42,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:16:41" (1/3) ... [2020-10-20 06:16:42,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471d3b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:16:42, skipping insertion in model container [2020-10-20 06:16:42,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:41" (2/3) ... [2020-10-20 06:16:42,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471d3b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:16:42, skipping insertion in model container [2020-10-20 06:16:42,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:42" (3/3) ... [2020-10-20 06:16:42,413 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-10-20 06:16:42,428 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:16:42,436 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 06:16:42,481 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 06:16:42,516 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:16:42,517 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 06:16:42,517 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:16:42,517 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:16:42,517 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:16:42,517 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:16:42,518 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:16:42,518 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:16:42,536 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-20 06:16:42,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 06:16:42,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:42,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:42,548 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:42,554 INFO L82 PathProgramCache]: Analyzing trace with hash -374442078, now seen corresponding path program 1 times [2020-10-20 06:16:42,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:42,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020235975] [2020-10-20 06:16:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:42,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:42,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020235975] [2020-10-20 06:16:42,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:42,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:16:42,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553765489] [2020-10-20 06:16:42,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:16:42,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:42,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:16:42,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:16:42,821 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-10-20 06:16:42,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:42,877 INFO L93 Difference]: Finished difference Result 37 states and 57 transitions. [2020-10-20 06:16:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:16:42,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-20 06:16:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:42,896 INFO L225 Difference]: With dead ends: 37 [2020-10-20 06:16:42,896 INFO L226 Difference]: Without dead ends: 32 [2020-10-20 06:16:42,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:16:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-20 06:16:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-20 06:16:42,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 06:16:42,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 52 transitions. [2020-10-20 06:16:42,939 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 52 transitions. Word has length 9 [2020-10-20 06:16:42,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:42,940 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 52 transitions. [2020-10-20 06:16:42,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:16:42,940 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 52 transitions. [2020-10-20 06:16:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 06:16:42,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:42,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:42,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:16:42,942 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:42,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:42,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1509280444, now seen corresponding path program 1 times [2020-10-20 06:16:42,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:42,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131924198] [2020-10-20 06:16:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:43,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:43,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131924198] [2020-10-20 06:16:43,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:43,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:43,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524527554] [2020-10-20 06:16:43,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:43,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:43,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:43,100 INFO L87 Difference]: Start difference. First operand 32 states and 52 transitions. Second operand 4 states. [2020-10-20 06:16:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:43,264 INFO L93 Difference]: Finished difference Result 55 states and 94 transitions. [2020-10-20 06:16:43,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:43,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-20 06:16:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:43,267 INFO L225 Difference]: With dead ends: 55 [2020-10-20 06:16:43,267 INFO L226 Difference]: Without dead ends: 55 [2020-10-20 06:16:43,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:43,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-20 06:16:43,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-10-20 06:16:43,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-20 06:16:43,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 67 transitions. [2020-10-20 06:16:43,279 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 67 transitions. Word has length 19 [2020-10-20 06:16:43,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:43,280 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 67 transitions. [2020-10-20 06:16:43,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 67 transitions. [2020-10-20 06:16:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 06:16:43,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:43,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:43,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:16:43,282 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:43,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2084622274, now seen corresponding path program 1 times [2020-10-20 06:16:43,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:43,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410621383] [2020-10-20 06:16:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:43,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:43,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410621383] [2020-10-20 06:16:43,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:43,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:43,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524365692] [2020-10-20 06:16:43,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:43,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:43,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:43,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:43,409 INFO L87 Difference]: Start difference. First operand 40 states and 67 transitions. Second operand 4 states. [2020-10-20 06:16:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:43,559 INFO L93 Difference]: Finished difference Result 55 states and 92 transitions. [2020-10-20 06:16:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:43,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-20 06:16:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:43,562 INFO L225 Difference]: With dead ends: 55 [2020-10-20 06:16:43,562 INFO L226 Difference]: Without dead ends: 55 [2020-10-20 06:16:43,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:43,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-20 06:16:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-20 06:16:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-20 06:16:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 91 transitions. [2020-10-20 06:16:43,571 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 91 transitions. Word has length 19 [2020-10-20 06:16:43,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:43,571 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 91 transitions. [2020-10-20 06:16:43,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 91 transitions. [2020-10-20 06:16:43,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 06:16:43,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:43,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:43,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 06:16:43,574 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:43,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:43,574 INFO L82 PathProgramCache]: Analyzing trace with hash -450308896, now seen corresponding path program 1 times [2020-10-20 06:16:43,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:43,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539947059] [2020-10-20 06:16:43,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:43,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:43,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539947059] [2020-10-20 06:16:43,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:43,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:43,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248056860] [2020-10-20 06:16:43,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:43,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:43,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:43,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:43,649 INFO L87 Difference]: Start difference. First operand 54 states and 91 transitions. Second operand 4 states. [2020-10-20 06:16:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:43,793 INFO L93 Difference]: Finished difference Result 58 states and 94 transitions. [2020-10-20 06:16:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:43,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-20 06:16:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:43,795 INFO L225 Difference]: With dead ends: 58 [2020-10-20 06:16:43,795 INFO L226 Difference]: Without dead ends: 58 [2020-10-20 06:16:43,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-20 06:16:43,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-20 06:16:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-20 06:16:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 93 transitions. [2020-10-20 06:16:43,805 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 93 transitions. Word has length 20 [2020-10-20 06:16:43,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:43,805 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 93 transitions. [2020-10-20 06:16:43,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 93 transitions. [2020-10-20 06:16:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 06:16:43,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:43,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:43,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 06:16:43,808 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:43,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:43,808 INFO L82 PathProgramCache]: Analyzing trace with hash -192143458, now seen corresponding path program 1 times [2020-10-20 06:16:43,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:43,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853981516] [2020-10-20 06:16:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:43,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:43,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853981516] [2020-10-20 06:16:43,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:43,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:43,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141001809] [2020-10-20 06:16:43,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:43,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:43,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:43,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:43,918 INFO L87 Difference]: Start difference. First operand 57 states and 93 transitions. Second operand 4 states. [2020-10-20 06:16:44,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:44,058 INFO L93 Difference]: Finished difference Result 101 states and 167 transitions. [2020-10-20 06:16:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:44,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-20 06:16:44,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:44,060 INFO L225 Difference]: With dead ends: 101 [2020-10-20 06:16:44,060 INFO L226 Difference]: Without dead ends: 101 [2020-10-20 06:16:44,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:44,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-20 06:16:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-20 06:16:44,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-20 06:16:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 166 transitions. [2020-10-20 06:16:44,072 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 166 transitions. Word has length 20 [2020-10-20 06:16:44,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:44,072 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 166 transitions. [2020-10-20 06:16:44,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 166 transitions. [2020-10-20 06:16:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 06:16:44,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:44,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:44,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 06:16:44,074 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:44,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:44,075 INFO L82 PathProgramCache]: Analyzing trace with hash -893208036, now seen corresponding path program 1 times [2020-10-20 06:16:44,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:44,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174649005] [2020-10-20 06:16:44,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:44,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174649005] [2020-10-20 06:16:44,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:44,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:44,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921384936] [2020-10-20 06:16:44,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:44,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:44,153 INFO L87 Difference]: Start difference. First operand 100 states and 166 transitions. Second operand 4 states. [2020-10-20 06:16:44,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:44,304 INFO L93 Difference]: Finished difference Result 125 states and 209 transitions. [2020-10-20 06:16:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:44,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-20 06:16:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:44,306 INFO L225 Difference]: With dead ends: 125 [2020-10-20 06:16:44,307 INFO L226 Difference]: Without dead ends: 125 [2020-10-20 06:16:44,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:44,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-20 06:16:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 100. [2020-10-20 06:16:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-20 06:16:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 164 transitions. [2020-10-20 06:16:44,329 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 164 transitions. Word has length 20 [2020-10-20 06:16:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:44,329 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 164 transitions. [2020-10-20 06:16:44,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 164 transitions. [2020-10-20 06:16:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:16:44,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:44,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:44,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 06:16:44,334 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:44,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:44,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1654831735, now seen corresponding path program 1 times [2020-10-20 06:16:44,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:44,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216056264] [2020-10-20 06:16:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:44,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216056264] [2020-10-20 06:16:44,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:44,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:44,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328913204] [2020-10-20 06:16:44,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:44,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:44,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:44,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:44,434 INFO L87 Difference]: Start difference. First operand 100 states and 164 transitions. Second operand 4 states. [2020-10-20 06:16:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:44,564 INFO L93 Difference]: Finished difference Result 177 states and 295 transitions. [2020-10-20 06:16:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:44,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-20 06:16:44,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:44,566 INFO L225 Difference]: With dead ends: 177 [2020-10-20 06:16:44,567 INFO L226 Difference]: Without dead ends: 177 [2020-10-20 06:16:44,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-20 06:16:44,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-20 06:16:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-20 06:16:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 222 transitions. [2020-10-20 06:16:44,578 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 222 transitions. Word has length 21 [2020-10-20 06:16:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:44,578 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 222 transitions. [2020-10-20 06:16:44,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 222 transitions. [2020-10-20 06:16:44,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:16:44,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:44,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:44,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 06:16:44,581 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:44,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:44,582 INFO L82 PathProgramCache]: Analyzing trace with hash -953767157, now seen corresponding path program 1 times [2020-10-20 06:16:44,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:44,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731789432] [2020-10-20 06:16:44,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:44,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731789432] [2020-10-20 06:16:44,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:44,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:44,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525822691] [2020-10-20 06:16:44,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:44,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:44,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:44,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:44,638 INFO L87 Difference]: Start difference. First operand 136 states and 222 transitions. Second operand 4 states. [2020-10-20 06:16:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:44,747 INFO L93 Difference]: Finished difference Result 185 states and 297 transitions. [2020-10-20 06:16:44,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:44,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-20 06:16:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:44,751 INFO L225 Difference]: With dead ends: 185 [2020-10-20 06:16:44,751 INFO L226 Difference]: Without dead ends: 185 [2020-10-20 06:16:44,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-20 06:16:44,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-10-20 06:16:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-20 06:16:44,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 296 transitions. [2020-10-20 06:16:44,773 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 296 transitions. Word has length 21 [2020-10-20 06:16:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:44,774 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 296 transitions. [2020-10-20 06:16:44,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 296 transitions. [2020-10-20 06:16:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 06:16:44,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:44,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:44,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 06:16:44,778 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:44,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:44,779 INFO L82 PathProgramCache]: Analyzing trace with hash 246482505, now seen corresponding path program 1 times [2020-10-20 06:16:44,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:44,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124545052] [2020-10-20 06:16:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:44,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124545052] [2020-10-20 06:16:44,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:44,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:44,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001977946] [2020-10-20 06:16:44,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:44,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:44,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:44,874 INFO L87 Difference]: Start difference. First operand 184 states and 296 transitions. Second operand 4 states. [2020-10-20 06:16:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:44,997 INFO L93 Difference]: Finished difference Result 191 states and 301 transitions. [2020-10-20 06:16:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:44,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-20 06:16:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:44,999 INFO L225 Difference]: With dead ends: 191 [2020-10-20 06:16:44,999 INFO L226 Difference]: Without dead ends: 191 [2020-10-20 06:16:45,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-20 06:16:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2020-10-20 06:16:45,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-20 06:16:45,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 300 transitions. [2020-10-20 06:16:45,016 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 300 transitions. Word has length 22 [2020-10-20 06:16:45,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:45,017 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 300 transitions. [2020-10-20 06:16:45,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:45,017 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 300 transitions. [2020-10-20 06:16:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 06:16:45,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:45,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:45,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 06:16:45,019 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:45,019 INFO L82 PathProgramCache]: Analyzing trace with hash 504647943, now seen corresponding path program 1 times [2020-10-20 06:16:45,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:45,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405268550] [2020-10-20 06:16:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:45,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405268550] [2020-10-20 06:16:45,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:45,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:45,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795657312] [2020-10-20 06:16:45,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:45,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:45,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:45,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:45,083 INFO L87 Difference]: Start difference. First operand 190 states and 300 transitions. Second operand 4 states. [2020-10-20 06:16:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:45,195 INFO L93 Difference]: Finished difference Result 331 states and 525 transitions. [2020-10-20 06:16:45,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:45,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-20 06:16:45,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:45,198 INFO L225 Difference]: With dead ends: 331 [2020-10-20 06:16:45,198 INFO L226 Difference]: Without dead ends: 331 [2020-10-20 06:16:45,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:45,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-20 06:16:45,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 266. [2020-10-20 06:16:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-20 06:16:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 412 transitions. [2020-10-20 06:16:45,207 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 412 transitions. Word has length 22 [2020-10-20 06:16:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:45,208 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 412 transitions. [2020-10-20 06:16:45,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 412 transitions. [2020-10-20 06:16:45,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 06:16:45,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:45,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:45,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 06:16:45,210 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:45,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:45,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1205712521, now seen corresponding path program 1 times [2020-10-20 06:16:45,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:45,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545635557] [2020-10-20 06:16:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:45,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545635557] [2020-10-20 06:16:45,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:45,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:45,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47404078] [2020-10-20 06:16:45,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:45,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:45,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:45,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:45,275 INFO L87 Difference]: Start difference. First operand 266 states and 412 transitions. Second operand 4 states. [2020-10-20 06:16:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:45,376 INFO L93 Difference]: Finished difference Result 355 states and 537 transitions. [2020-10-20 06:16:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:45,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-20 06:16:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:45,379 INFO L225 Difference]: With dead ends: 355 [2020-10-20 06:16:45,380 INFO L226 Difference]: Without dead ends: 355 [2020-10-20 06:16:45,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:45,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-20 06:16:45,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 354. [2020-10-20 06:16:45,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-20 06:16:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 536 transitions. [2020-10-20 06:16:45,391 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 536 transitions. Word has length 22 [2020-10-20 06:16:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:45,392 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 536 transitions. [2020-10-20 06:16:45,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 536 transitions. [2020-10-20 06:16:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 06:16:45,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:45,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:45,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-20 06:16:45,394 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:45,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:45,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1529113642, now seen corresponding path program 1 times [2020-10-20 06:16:45,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:45,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701151345] [2020-10-20 06:16:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:45,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701151345] [2020-10-20 06:16:45,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:45,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:45,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736408711] [2020-10-20 06:16:45,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:45,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:45,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:45,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:45,444 INFO L87 Difference]: Start difference. First operand 354 states and 536 transitions. Second operand 4 states. [2020-10-20 06:16:45,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:45,571 INFO L93 Difference]: Finished difference Result 363 states and 537 transitions. [2020-10-20 06:16:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:45,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-20 06:16:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:45,574 INFO L225 Difference]: With dead ends: 363 [2020-10-20 06:16:45,574 INFO L226 Difference]: Without dead ends: 363 [2020-10-20 06:16:45,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:45,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-20 06:16:45,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 362. [2020-10-20 06:16:45,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-20 06:16:45,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 536 transitions. [2020-10-20 06:16:45,584 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 536 transitions. Word has length 23 [2020-10-20 06:16:45,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:45,585 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 536 transitions. [2020-10-20 06:16:45,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:45,586 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 536 transitions. [2020-10-20 06:16:45,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 06:16:45,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:45,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:45,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-20 06:16:45,589 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:45,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:45,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1270948204, now seen corresponding path program 1 times [2020-10-20 06:16:45,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:45,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302137039] [2020-10-20 06:16:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:45,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302137039] [2020-10-20 06:16:45,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:45,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:45,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758956179] [2020-10-20 06:16:45,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:45,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:45,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:45,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:45,650 INFO L87 Difference]: Start difference. First operand 362 states and 536 transitions. Second operand 4 states. [2020-10-20 06:16:45,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:45,759 INFO L93 Difference]: Finished difference Result 619 states and 913 transitions. [2020-10-20 06:16:45,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:45,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-20 06:16:45,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:45,763 INFO L225 Difference]: With dead ends: 619 [2020-10-20 06:16:45,763 INFO L226 Difference]: Without dead ends: 619 [2020-10-20 06:16:45,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-10-20 06:16:45,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 522. [2020-10-20 06:16:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-10-20 06:16:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 752 transitions. [2020-10-20 06:16:45,777 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 752 transitions. Word has length 23 [2020-10-20 06:16:45,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:45,777 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 752 transitions. [2020-10-20 06:16:45,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 752 transitions. [2020-10-20 06:16:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 06:16:45,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:45,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:45,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-20 06:16:45,779 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:45,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:45,780 INFO L82 PathProgramCache]: Analyzing trace with hash -569883626, now seen corresponding path program 1 times [2020-10-20 06:16:45,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:45,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018964911] [2020-10-20 06:16:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:45,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018964911] [2020-10-20 06:16:45,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:45,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:45,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863869342] [2020-10-20 06:16:45,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:45,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:45,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:45,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:45,829 INFO L87 Difference]: Start difference. First operand 522 states and 752 transitions. Second operand 4 states. [2020-10-20 06:16:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:45,924 INFO L93 Difference]: Finished difference Result 683 states and 953 transitions. [2020-10-20 06:16:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:45,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-20 06:16:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:45,928 INFO L225 Difference]: With dead ends: 683 [2020-10-20 06:16:45,928 INFO L226 Difference]: Without dead ends: 683 [2020-10-20 06:16:45,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:45,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2020-10-20 06:16:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 682. [2020-10-20 06:16:45,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2020-10-20 06:16:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 952 transitions. [2020-10-20 06:16:45,945 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 952 transitions. Word has length 23 [2020-10-20 06:16:45,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:45,946 INFO L481 AbstractCegarLoop]: Abstraction has 682 states and 952 transitions. [2020-10-20 06:16:45,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 952 transitions. [2020-10-20 06:16:45,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 06:16:45,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:45,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:45,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-20 06:16:45,948 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:45,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:45,949 INFO L82 PathProgramCache]: Analyzing trace with hash -738008780, now seen corresponding path program 1 times [2020-10-20 06:16:45,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:45,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558040244] [2020-10-20 06:16:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:46,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558040244] [2020-10-20 06:16:46,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:46,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:46,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857666496] [2020-10-20 06:16:46,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:46,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:46,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:46,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:46,007 INFO L87 Difference]: Start difference. First operand 682 states and 952 transitions. Second operand 4 states. [2020-10-20 06:16:46,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:46,097 INFO L93 Difference]: Finished difference Result 699 states and 953 transitions. [2020-10-20 06:16:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:46,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-20 06:16:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:46,104 INFO L225 Difference]: With dead ends: 699 [2020-10-20 06:16:46,104 INFO L226 Difference]: Without dead ends: 699 [2020-10-20 06:16:46,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-10-20 06:16:46,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 698. [2020-10-20 06:16:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2020-10-20 06:16:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 952 transitions. [2020-10-20 06:16:46,125 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 952 transitions. Word has length 24 [2020-10-20 06:16:46,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:46,126 INFO L481 AbstractCegarLoop]: Abstraction has 698 states and 952 transitions. [2020-10-20 06:16:46,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 952 transitions. [2020-10-20 06:16:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 06:16:46,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:46,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:46,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-20 06:16:46,129 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:46,129 INFO L82 PathProgramCache]: Analyzing trace with hash -479843342, now seen corresponding path program 1 times [2020-10-20 06:16:46,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:46,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048389038] [2020-10-20 06:16:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:46,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048389038] [2020-10-20 06:16:46,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:46,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:46,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570902348] [2020-10-20 06:16:46,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:46,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:46,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:46,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:46,176 INFO L87 Difference]: Start difference. First operand 698 states and 952 transitions. Second operand 4 states. [2020-10-20 06:16:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:46,287 INFO L93 Difference]: Finished difference Result 1163 states and 1561 transitions. [2020-10-20 06:16:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:46,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-20 06:16:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:46,293 INFO L225 Difference]: With dead ends: 1163 [2020-10-20 06:16:46,294 INFO L226 Difference]: Without dead ends: 1163 [2020-10-20 06:16:46,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2020-10-20 06:16:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1034. [2020-10-20 06:16:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2020-10-20 06:16:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1368 transitions. [2020-10-20 06:16:46,320 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1368 transitions. Word has length 24 [2020-10-20 06:16:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:46,320 INFO L481 AbstractCegarLoop]: Abstraction has 1034 states and 1368 transitions. [2020-10-20 06:16:46,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1368 transitions. [2020-10-20 06:16:46,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 06:16:46,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:46,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:46,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-20 06:16:46,323 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:46,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:46,324 INFO L82 PathProgramCache]: Analyzing trace with hash 221221236, now seen corresponding path program 1 times [2020-10-20 06:16:46,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:46,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779213585] [2020-10-20 06:16:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:46,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779213585] [2020-10-20 06:16:46,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:46,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:46,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51233472] [2020-10-20 06:16:46,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:46,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:46,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:46,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:46,367 INFO L87 Difference]: Start difference. First operand 1034 states and 1368 transitions. Second operand 4 states. [2020-10-20 06:16:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:46,477 INFO L93 Difference]: Finished difference Result 1323 states and 1673 transitions. [2020-10-20 06:16:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:46,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-20 06:16:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:46,483 INFO L225 Difference]: With dead ends: 1323 [2020-10-20 06:16:46,483 INFO L226 Difference]: Without dead ends: 1323 [2020-10-20 06:16:46,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:46,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2020-10-20 06:16:46,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1322. [2020-10-20 06:16:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1322 states. [2020-10-20 06:16:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1672 transitions. [2020-10-20 06:16:46,517 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1672 transitions. Word has length 24 [2020-10-20 06:16:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:46,518 INFO L481 AbstractCegarLoop]: Abstraction has 1322 states and 1672 transitions. [2020-10-20 06:16:46,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:46,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1672 transitions. [2020-10-20 06:16:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 06:16:46,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:46,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:46,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-20 06:16:46,522 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:46,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1983551263, now seen corresponding path program 1 times [2020-10-20 06:16:46,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:46,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029301538] [2020-10-20 06:16:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:46,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029301538] [2020-10-20 06:16:46,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:46,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:46,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137915872] [2020-10-20 06:16:46,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:46,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:46,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:46,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:46,569 INFO L87 Difference]: Start difference. First operand 1322 states and 1672 transitions. Second operand 4 states. [2020-10-20 06:16:46,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:46,659 INFO L93 Difference]: Finished difference Result 1355 states and 1673 transitions. [2020-10-20 06:16:46,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:46,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-20 06:16:46,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:46,666 INFO L225 Difference]: With dead ends: 1355 [2020-10-20 06:16:46,666 INFO L226 Difference]: Without dead ends: 1355 [2020-10-20 06:16:46,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-10-20 06:16:46,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1354. [2020-10-20 06:16:46,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1354 states. [2020-10-20 06:16:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1672 transitions. [2020-10-20 06:16:46,694 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1672 transitions. Word has length 25 [2020-10-20 06:16:46,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:46,695 INFO L481 AbstractCegarLoop]: Abstraction has 1354 states and 1672 transitions. [2020-10-20 06:16:46,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:46,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1672 transitions. [2020-10-20 06:16:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 06:16:46,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:46,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:46,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-20 06:16:46,698 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:46,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1725385825, now seen corresponding path program 1 times [2020-10-20 06:16:46,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:46,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644207699] [2020-10-20 06:16:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:46,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644207699] [2020-10-20 06:16:46,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:46,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:46,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829328561] [2020-10-20 06:16:46,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:46,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:46,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:46,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:46,754 INFO L87 Difference]: Start difference. First operand 1354 states and 1672 transitions. Second operand 4 states. [2020-10-20 06:16:46,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:46,855 INFO L93 Difference]: Finished difference Result 2186 states and 2600 transitions. [2020-10-20 06:16:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:46,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-20 06:16:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:46,865 INFO L225 Difference]: With dead ends: 2186 [2020-10-20 06:16:46,866 INFO L226 Difference]: Without dead ends: 2186 [2020-10-20 06:16:46,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:46,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2020-10-20 06:16:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2058. [2020-10-20 06:16:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2058 states. [2020-10-20 06:16:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 2472 transitions. [2020-10-20 06:16:46,928 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 2472 transitions. Word has length 25 [2020-10-20 06:16:46,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:46,928 INFO L481 AbstractCegarLoop]: Abstraction has 2058 states and 2472 transitions. [2020-10-20 06:16:46,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 2472 transitions. [2020-10-20 06:16:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 06:16:46,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:46,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:46,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-20 06:16:46,933 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:46,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:46,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1024321247, now seen corresponding path program 1 times [2020-10-20 06:16:46,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:46,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500216579] [2020-10-20 06:16:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:46,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500216579] [2020-10-20 06:16:46,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:46,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:46,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425612253] [2020-10-20 06:16:46,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:46,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:46,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:46,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:46,989 INFO L87 Difference]: Start difference. First operand 2058 states and 2472 transitions. Second operand 4 states. [2020-10-20 06:16:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:47,129 INFO L93 Difference]: Finished difference Result 2567 states and 2886 transitions. [2020-10-20 06:16:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:47,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-20 06:16:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:47,130 INFO L225 Difference]: With dead ends: 2567 [2020-10-20 06:16:47,131 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 06:16:47,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:47,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 06:16:47,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 06:16:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 06:16:47,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 06:16:47,133 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-10-20 06:16:47,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:47,133 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:16:47,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:47,134 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:16:47,134 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 06:16:47,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-20 06:16:47,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:16:47 BoogieIcfgContainer [2020-10-20 06:16:47,141 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:16:47,142 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:16:47,142 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:16:47,142 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:16:47,143 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:42" (3/4) ... [2020-10-20 06:16:47,147 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 06:16:47,155 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-20 06:16:47,155 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-20 06:16:47,156 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-20 06:16:47,163 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-20 06:16:47,163 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 06:16:47,164 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 06:16:47,164 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 06:16:47,238 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:16:47,240 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:16:47,245 INFO L168 Benchmark]: Toolchain (without parser) took 5642.90 ms. Allocated memory was 36.2 MB in the beginning and 86.0 MB in the end (delta: 49.8 MB). Free memory was 10.4 MB in the beginning and 43.6 MB in the end (delta: -33.1 MB). Peak memory consumption was 16.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:47,246 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 36.2 MB. Free memory was 15.5 MB in the beginning and 15.4 MB in the end (delta: 73.7 kB). Peak memory consumption was 73.7 kB. Max. memory is 14.3 GB. [2020-10-20 06:16:47,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 386.56 ms. Allocated memory was 36.2 MB in the beginning and 45.6 MB in the end (delta: 9.4 MB). Free memory was 9.5 MB in the beginning and 28.4 MB in the end (delta: -18.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:47,247 INFO L168 Benchmark]: Boogie Preprocessor took 37.01 ms. Allocated memory is still 45.6 MB. Free memory was 28.4 MB in the beginning and 26.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:47,248 INFO L168 Benchmark]: RCFGBuilder took 374.45 ms. Allocated memory was 45.6 MB in the beginning and 47.7 MB in the end (delta: 2.1 MB). Free memory was 26.5 MB in the beginning and 22.1 MB in the end (delta: 4.4 MB). Peak memory consumption was 15.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:47,248 INFO L168 Benchmark]: TraceAbstraction took 4735.48 ms. Allocated memory was 47.7 MB in the beginning and 86.0 MB in the end (delta: 38.3 MB). Free memory was 21.6 MB in the beginning and 48.3 MB in the end (delta: -26.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:47,249 INFO L168 Benchmark]: Witness Printer took 98.33 ms. Allocated memory is still 86.0 MB. Free memory was 48.3 MB in the beginning and 43.6 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:47,252 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 36.2 MB. Free memory was 15.5 MB in the beginning and 15.4 MB in the end (delta: 73.7 kB). Peak memory consumption was 73.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 386.56 ms. Allocated memory was 36.2 MB in the beginning and 45.6 MB in the end (delta: 9.4 MB). Free memory was 9.5 MB in the beginning and 28.4 MB in the end (delta: -18.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 37.01 ms. Allocated memory is still 45.6 MB. Free memory was 28.4 MB in the beginning and 26.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * RCFGBuilder took 374.45 ms. Allocated memory was 45.6 MB in the beginning and 47.7 MB in the end (delta: 2.1 MB). Free memory was 26.5 MB in the beginning and 22.1 MB in the end (delta: 4.4 MB). Peak memory consumption was 15.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4735.48 ms. Allocated memory was 47.7 MB in the beginning and 86.0 MB in the end (delta: 38.3 MB). Free memory was 21.6 MB in the beginning and 48.3 MB in the end (delta: -26.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 14.3 GB. * Witness Printer took 98.33 ms. Allocated memory is still 86.0 MB. Free memory was 48.3 MB in the beginning and 43.6 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 41 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1252 SDtfs, 1714 SDslu, 147 SDs, 0 SdLazy, 866 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2058occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 511 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 431 NumberOfCodeBlocks, 431 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 411 ConstructedInterpolants, 0 QuantifiedInterpolants, 27714 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...