./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_9.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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_9.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 20a70402cc893fb2c7adec21ca8a267adc3c5cbb ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 06:16:41,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:16:41,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:16:41,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:16:41,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:16:41,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:16:41,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:16:41,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:16:41,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:16:41,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:16:41,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:16:41,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:16:41,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:16:41,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:16:41,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:16:41,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:16:41,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:16:41,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:16:41,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:16:41,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:16:41,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:16:41,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:16:41,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:16:41,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:16:41,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:16:41,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:16:41,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:16:41,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:16:41,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:16:41,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:16:41,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:16:41,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:16:41,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:16:41,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:16:41,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:16:41,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:16:41,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:16:41,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:16:41,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:16:41,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:16:41,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:16:41,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 06:16:41,489 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:16:41,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:16:41,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:16:41,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:16:41,491 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:16:41,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:16:41,491 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:16:41,492 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:16:41,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:16:41,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:16:41,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:16:41,493 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:16:41,493 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:16:41,493 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 06:16:41,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:16:41,494 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:16:41,494 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:16:41,494 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:16:41,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:16:41,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:16:41,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:16:41,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:16:41,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:16:41,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:16:41,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:16:41,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:16:41,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:16:41,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:16:41,497 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 -> 20a70402cc893fb2c7adec21ca8a267adc3c5cbb [2020-10-20 06:16:41,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:16:41,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:16:41,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:16:41,723 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:16:41,724 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:16:41,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_9.c [2020-10-20 06:16:41,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b47e7c89/17afc25ef6b9439281918c245254201b/FLAG3043cba92 [2020-10-20 06:16:42,219 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:16:42,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_9.c [2020-10-20 06:16:42,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b47e7c89/17afc25ef6b9439281918c245254201b/FLAG3043cba92 [2020-10-20 06:16:42,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b47e7c89/17afc25ef6b9439281918c245254201b [2020-10-20 06:16:42,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:16:42,586 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:16:42,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:16:42,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:16:42,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:16:42,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:16:42" (1/1) ... [2020-10-20 06:16:42,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c2896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:42, skipping insertion in model container [2020-10-20 06:16:42,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:16:42" (1/1) ... [2020-10-20 06:16:42,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:16:42,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:16:42,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:16:42,945 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:16:42,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:16:42,985 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:16:42,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:42 WrapperNode [2020-10-20 06:16:42,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:16:42,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:16:42,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:16:42,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:16:42,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:42" (1/1) ... [2020-10-20 06:16:42,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:42" (1/1) ... [2020-10-20 06:16:43,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:42" (1/1) ... [2020-10-20 06:16:43,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:42" (1/1) ... [2020-10-20 06:16:43,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:42" (1/1) ... [2020-10-20 06:16:43,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:42" (1/1) ... [2020-10-20 06:16:43,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:42" (1/1) ... [2020-10-20 06:16:43,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:16:43,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:16:43,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:16:43,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:16:43,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:42" (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 06:16:43,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 06:16:43,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:16:43,081 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-20 06:16:43,081 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 06:16:43,081 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 06:16:43,081 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-20 06:16:43,081 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-20 06:16:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:16:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 06:16:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 06:16:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 06:16:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:16:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:16:43,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 06:16:43,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 06:16:43,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:16:43,399 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:16:43,400 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-20 06:16:43,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:43 BoogieIcfgContainer [2020-10-20 06:16:43,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:16:43,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:16:43,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:16:43,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:16:43,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:16:42" (1/3) ... [2020-10-20 06:16:43,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495558dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:16:43, skipping insertion in model container [2020-10-20 06:16:43,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:42" (2/3) ... [2020-10-20 06:16:43,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495558dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:16:43, skipping insertion in model container [2020-10-20 06:16:43,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:43" (3/3) ... [2020-10-20 06:16:43,414 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-10-20 06:16:43,431 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:16:43,438 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 06:16:43,464 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 06:16:43,486 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:16:43,487 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 06:16:43,487 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:16:43,487 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:16:43,487 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:16:43,488 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:16:43,488 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:16:43,488 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:16:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-20 06:16:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 06:16:43,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:43,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:43,524 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:43,531 INFO L82 PathProgramCache]: Analyzing trace with hash -693527066, now seen corresponding path program 1 times [2020-10-20 06:16:43,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:43,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140692148] [2020-10-20 06:16:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:43,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:43,790 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 06:16:43,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140692148] [2020-10-20 06:16:43,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:43,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:16:43,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109593914] [2020-10-20 06:16:43,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:16:43,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:43,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:16:43,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:16:43,818 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-10-20 06:16:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:43,885 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2020-10-20 06:16:43,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:16:43,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-20 06:16:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:43,905 INFO L225 Difference]: With dead ends: 43 [2020-10-20 06:16:43,905 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 06:16:43,909 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 06:16:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 06:16:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-20 06:16:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-20 06:16:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2020-10-20 06:16:43,946 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 9 [2020-10-20 06:16:43,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:43,947 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2020-10-20 06:16:43,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:16:43,947 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2020-10-20 06:16:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:16:43,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:43,948 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] [2020-10-20 06:16:43,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:16:43,949 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:43,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:43,950 INFO L82 PathProgramCache]: Analyzing trace with hash 838313058, now seen corresponding path program 1 times [2020-10-20 06:16:43,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:43,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145338767] [2020-10-20 06:16:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:44,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145338767] [2020-10-20 06:16:44,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:44,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:44,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358559844] [2020-10-20 06:16:44,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:44,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:44,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:44,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:44,091 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand 4 states. [2020-10-20 06:16:44,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:44,320 INFO L93 Difference]: Finished difference Result 67 states and 118 transitions. [2020-10-20 06:16:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:44,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-20 06:16:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:44,323 INFO L225 Difference]: With dead ends: 67 [2020-10-20 06:16:44,323 INFO L226 Difference]: Without dead ends: 67 [2020-10-20 06:16:44,324 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 06:16:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-20 06:16:44,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2020-10-20 06:16:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-20 06:16:44,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 83 transitions. [2020-10-20 06:16:44,346 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 83 transitions. Word has length 21 [2020-10-20 06:16:44,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:44,346 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 83 transitions. [2020-10-20 06:16:44,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 83 transitions. [2020-10-20 06:16:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:16:44,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:44,349 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 06:16:44,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:16:44,351 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:44,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:44,352 INFO L82 PathProgramCache]: Analyzing trace with hash 251507044, now seen corresponding path program 1 times [2020-10-20 06:16:44,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:44,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479771853] [2020-10-20 06:16:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,454 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 06:16:44,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479771853] [2020-10-20 06:16:44,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:44,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:44,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180965587] [2020-10-20 06:16:44,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:44,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:44,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:44,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:44,457 INFO L87 Difference]: Start difference. First operand 48 states and 83 transitions. Second operand 4 states. [2020-10-20 06:16:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:44,626 INFO L93 Difference]: Finished difference Result 67 states and 116 transitions. [2020-10-20 06:16:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:44,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-20 06:16:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:44,628 INFO L225 Difference]: With dead ends: 67 [2020-10-20 06:16:44,628 INFO L226 Difference]: Without dead ends: 67 [2020-10-20 06:16:44,629 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 06:16:44,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-20 06:16:44,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-20 06:16:44,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-20 06:16:44,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 115 transitions. [2020-10-20 06:16:44,638 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 115 transitions. Word has length 21 [2020-10-20 06:16:44,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:44,639 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 115 transitions. [2020-10-20 06:16:44,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:44,639 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 115 transitions. [2020-10-20 06:16:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 06:16:44,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:44,647 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 06:16:44,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 06:16:44,648 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:44,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:44,648 INFO L82 PathProgramCache]: Analyzing trace with hash 224518530, now seen corresponding path program 1 times [2020-10-20 06:16:44,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:44,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756178090] [2020-10-20 06:16:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:44,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756178090] [2020-10-20 06:16:44,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:44,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:44,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015107045] [2020-10-20 06:16:44,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:44,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:44,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:44,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:44,778 INFO L87 Difference]: Start difference. First operand 66 states and 115 transitions. Second operand 4 states. [2020-10-20 06:16:44,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:44,938 INFO L93 Difference]: Finished difference Result 70 states and 118 transitions. [2020-10-20 06:16:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:44,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-20 06:16:44,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:44,940 INFO L225 Difference]: With dead ends: 70 [2020-10-20 06:16:44,940 INFO L226 Difference]: Without dead ends: 70 [2020-10-20 06:16:44,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:44,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-20 06:16:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-20 06:16:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-20 06:16:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 117 transitions. [2020-10-20 06:16:44,947 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 117 transitions. Word has length 22 [2020-10-20 06:16:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:44,948 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 117 transitions. [2020-10-20 06:16:44,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 117 transitions. [2020-10-20 06:16:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 06:16:44,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:44,949 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 06:16:44,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 06:16:44,950 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:44,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:44,950 INFO L82 PathProgramCache]: Analyzing trace with hash -786598720, now seen corresponding path program 1 times [2020-10-20 06:16:44,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:44,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969505062] [2020-10-20 06:16:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,049 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 06:16:45,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969505062] [2020-10-20 06:16:45,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:45,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:45,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185973025] [2020-10-20 06:16:45,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:45,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:45,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:45,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:45,053 INFO L87 Difference]: Start difference. First operand 69 states and 117 transitions. Second operand 4 states. [2020-10-20 06:16:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:45,221 INFO L93 Difference]: Finished difference Result 125 states and 215 transitions. [2020-10-20 06:16:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:45,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-20 06:16:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:45,224 INFO L225 Difference]: With dead ends: 125 [2020-10-20 06:16:45,224 INFO L226 Difference]: Without dead ends: 125 [2020-10-20 06:16:45,225 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 06:16:45,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-20 06:16:45,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-20 06:16:45,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-20 06:16:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 214 transitions. [2020-10-20 06:16:45,235 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 214 transitions. Word has length 22 [2020-10-20 06:16:45,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:45,235 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 214 transitions. [2020-10-20 06:16:45,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 214 transitions. [2020-10-20 06:16:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 06:16:45,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:45,237 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 06:16:45,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 06:16:45,238 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:45,238 INFO L82 PathProgramCache]: Analyzing trace with hash -199792706, now seen corresponding path program 1 times [2020-10-20 06:16:45,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:45,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785717130] [2020-10-20 06:16:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,301 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 06:16:45,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785717130] [2020-10-20 06:16:45,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:45,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:45,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509676222] [2020-10-20 06:16:45,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:45,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:45,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:45,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:45,304 INFO L87 Difference]: Start difference. First operand 124 states and 214 transitions. Second operand 4 states. [2020-10-20 06:16:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:45,426 INFO L93 Difference]: Finished difference Result 157 states and 273 transitions. [2020-10-20 06:16:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:45,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-20 06:16:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:45,428 INFO L225 Difference]: With dead ends: 157 [2020-10-20 06:16:45,428 INFO L226 Difference]: Without dead ends: 157 [2020-10-20 06:16:45,429 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 06:16:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-20 06:16:45,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 124. [2020-10-20 06:16:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-20 06:16:45,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 212 transitions. [2020-10-20 06:16:45,437 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 212 transitions. Word has length 22 [2020-10-20 06:16:45,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:45,438 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 212 transitions. [2020-10-20 06:16:45,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:45,438 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 212 transitions. [2020-10-20 06:16:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 06:16:45,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:45,439 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 06:16:45,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 06:16:45,440 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:45,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:45,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1391871535, now seen corresponding path program 1 times [2020-10-20 06:16:45,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:45,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894491580] [2020-10-20 06:16:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,506 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 06:16:45,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894491580] [2020-10-20 06:16:45,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:45,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:45,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826837811] [2020-10-20 06:16:45,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:45,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:45,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:45,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:45,509 INFO L87 Difference]: Start difference. First operand 124 states and 212 transitions. Second operand 4 states. [2020-10-20 06:16:45,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:45,647 INFO L93 Difference]: Finished difference Result 225 states and 391 transitions. [2020-10-20 06:16:45,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:45,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-20 06:16:45,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:45,649 INFO L225 Difference]: With dead ends: 225 [2020-10-20 06:16:45,649 INFO L226 Difference]: Without dead ends: 225 [2020-10-20 06:16:45,650 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 06:16:45,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-20 06:16:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2020-10-20 06:16:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-20 06:16:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 286 transitions. [2020-10-20 06:16:45,659 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 286 transitions. Word has length 23 [2020-10-20 06:16:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:45,660 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 286 transitions. [2020-10-20 06:16:45,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:45,660 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 286 transitions. [2020-10-20 06:16:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 06:16:45,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:45,661 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 06:16:45,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 06:16:45,662 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:45,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:45,662 INFO L82 PathProgramCache]: Analyzing trace with hash 805065521, now seen corresponding path program 1 times [2020-10-20 06:16:45,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:45,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384189741] [2020-10-20 06:16:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,708 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 06:16:45,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384189741] [2020-10-20 06:16:45,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:45,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:45,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870274112] [2020-10-20 06:16:45,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:45,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:45,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:45,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:45,711 INFO L87 Difference]: Start difference. First operand 168 states and 286 transitions. Second operand 4 states. [2020-10-20 06:16:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:45,838 INFO L93 Difference]: Finished difference Result 233 states and 393 transitions. [2020-10-20 06:16:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:45,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-20 06:16:45,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:45,840 INFO L225 Difference]: With dead ends: 233 [2020-10-20 06:16:45,840 INFO L226 Difference]: Without dead ends: 233 [2020-10-20 06:16:45,840 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 06:16:45,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-20 06:16:45,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-20 06:16:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-20 06:16:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 392 transitions. [2020-10-20 06:16:45,850 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 392 transitions. Word has length 23 [2020-10-20 06:16:45,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:45,850 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 392 transitions. [2020-10-20 06:16:45,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 392 transitions. [2020-10-20 06:16:45,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 06:16:45,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:45,852 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 06:16:45,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 06:16:45,852 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:45,853 INFO L82 PathProgramCache]: Analyzing trace with hash 204983275, now seen corresponding path program 1 times [2020-10-20 06:16:45,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:45,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041920121] [2020-10-20 06:16:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:45,901 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 06:16:45,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041920121] [2020-10-20 06:16:45,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:45,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:45,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964827122] [2020-10-20 06:16:45,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:45,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:45,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:45,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:45,904 INFO L87 Difference]: Start difference. First operand 232 states and 392 transitions. Second operand 4 states. [2020-10-20 06:16:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:46,047 INFO L93 Difference]: Finished difference Result 239 states and 397 transitions. [2020-10-20 06:16:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:46,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-20 06:16:46,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:46,049 INFO L225 Difference]: With dead ends: 239 [2020-10-20 06:16:46,050 INFO L226 Difference]: Without dead ends: 239 [2020-10-20 06:16:46,050 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 06:16:46,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-20 06:16:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2020-10-20 06:16:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-20 06:16:46,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 396 transitions. [2020-10-20 06:16:46,057 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 396 transitions. Word has length 24 [2020-10-20 06:16:46,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:46,057 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 396 transitions. [2020-10-20 06:16:46,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 396 transitions. [2020-10-20 06:16:46,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 06:16:46,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:46,060 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 06:16:46,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 06:16:46,060 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:46,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:46,061 INFO L82 PathProgramCache]: Analyzing trace with hash -806133975, now seen corresponding path program 1 times [2020-10-20 06:16:46,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:46,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830104587] [2020-10-20 06:16:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,115 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 06:16:46,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830104587] [2020-10-20 06:16:46,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:46,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:46,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392419278] [2020-10-20 06:16:46,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:46,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:46,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:46,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:46,118 INFO L87 Difference]: Start difference. First operand 238 states and 396 transitions. Second operand 4 states. [2020-10-20 06:16:46,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:46,249 INFO L93 Difference]: Finished difference Result 427 states and 717 transitions. [2020-10-20 06:16:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:46,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-20 06:16:46,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:46,253 INFO L225 Difference]: With dead ends: 427 [2020-10-20 06:16:46,253 INFO L226 Difference]: Without dead ends: 427 [2020-10-20 06:16:46,253 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 06:16:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-20 06:16:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 330. [2020-10-20 06:16:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-20 06:16:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 540 transitions. [2020-10-20 06:16:46,262 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 540 transitions. Word has length 24 [2020-10-20 06:16:46,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:46,263 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 540 transitions. [2020-10-20 06:16:46,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:46,263 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 540 transitions. [2020-10-20 06:16:46,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 06:16:46,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:46,266 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 06:16:46,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 06:16:46,266 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:46,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:46,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1392939989, now seen corresponding path program 1 times [2020-10-20 06:16:46,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:46,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668574492] [2020-10-20 06:16:46,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,315 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 06:16:46,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668574492] [2020-10-20 06:16:46,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:46,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:46,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011331474] [2020-10-20 06:16:46,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:46,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:46,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:46,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:46,318 INFO L87 Difference]: Start difference. First operand 330 states and 540 transitions. Second operand 4 states. [2020-10-20 06:16:46,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:46,444 INFO L93 Difference]: Finished difference Result 451 states and 729 transitions. [2020-10-20 06:16:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:46,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-20 06:16:46,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:46,447 INFO L225 Difference]: With dead ends: 451 [2020-10-20 06:16:46,447 INFO L226 Difference]: Without dead ends: 451 [2020-10-20 06:16:46,447 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 06:16:46,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-20 06:16:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 450. [2020-10-20 06:16:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-20 06:16:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 728 transitions. [2020-10-20 06:16:46,456 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 728 transitions. Word has length 24 [2020-10-20 06:16:46,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:46,457 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 728 transitions. [2020-10-20 06:16:46,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:46,457 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 728 transitions. [2020-10-20 06:16:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 06:16:46,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:46,458 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 06:16:46,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-20 06:16:46,459 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:46,459 INFO L82 PathProgramCache]: Analyzing trace with hash 786299772, now seen corresponding path program 1 times [2020-10-20 06:16:46,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:46,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849576459] [2020-10-20 06:16:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,511 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 06:16:46,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849576459] [2020-10-20 06:16:46,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:46,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:46,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125665325] [2020-10-20 06:16:46,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:46,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:46,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:46,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:46,513 INFO L87 Difference]: Start difference. First operand 450 states and 728 transitions. Second operand 4 states. [2020-10-20 06:16:46,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:46,629 INFO L93 Difference]: Finished difference Result 459 states and 729 transitions. [2020-10-20 06:16:46,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:46,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-20 06:16:46,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:46,632 INFO L225 Difference]: With dead ends: 459 [2020-10-20 06:16:46,632 INFO L226 Difference]: Without dead ends: 459 [2020-10-20 06:16:46,633 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 06:16:46,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-20 06:16:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 458. [2020-10-20 06:16:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-20 06:16:46,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 728 transitions. [2020-10-20 06:16:46,650 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 728 transitions. Word has length 25 [2020-10-20 06:16:46,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:46,651 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 728 transitions. [2020-10-20 06:16:46,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:46,651 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 728 transitions. [2020-10-20 06:16:46,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 06:16:46,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:46,652 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 06:16:46,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-20 06:16:46,652 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:46,653 INFO L82 PathProgramCache]: Analyzing trace with hash -224817478, now seen corresponding path program 1 times [2020-10-20 06:16:46,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:46,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529486630] [2020-10-20 06:16:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,697 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 06:16:46,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529486630] [2020-10-20 06:16:46,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:46,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:46,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521809639] [2020-10-20 06:16:46,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:46,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:46,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:46,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:46,699 INFO L87 Difference]: Start difference. First operand 458 states and 728 transitions. Second operand 4 states. [2020-10-20 06:16:46,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:46,815 INFO L93 Difference]: Finished difference Result 811 states and 1297 transitions. [2020-10-20 06:16:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:46,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-20 06:16:46,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:46,820 INFO L225 Difference]: With dead ends: 811 [2020-10-20 06:16:46,820 INFO L226 Difference]: Without dead ends: 811 [2020-10-20 06:16:46,821 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 06:16:46,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-10-20 06:16:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 650. [2020-10-20 06:16:46,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2020-10-20 06:16:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1008 transitions. [2020-10-20 06:16:46,836 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1008 transitions. Word has length 25 [2020-10-20 06:16:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:46,837 INFO L481 AbstractCegarLoop]: Abstraction has 650 states and 1008 transitions. [2020-10-20 06:16:46,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1008 transitions. [2020-10-20 06:16:46,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 06:16:46,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:46,838 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 06:16:46,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-20 06:16:46,839 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:46,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:46,839 INFO L82 PathProgramCache]: Analyzing trace with hash -811623492, now seen corresponding path program 1 times [2020-10-20 06:16:46,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:46,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807770485] [2020-10-20 06:16:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:46,892 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 06:16:46,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807770485] [2020-10-20 06:16:46,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:46,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:46,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660779472] [2020-10-20 06:16:46,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:46,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:46,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:46,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:46,894 INFO L87 Difference]: Start difference. First operand 650 states and 1008 transitions. Second operand 4 states. [2020-10-20 06:16:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:47,015 INFO L93 Difference]: Finished difference Result 875 states and 1337 transitions. [2020-10-20 06:16:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:47,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-20 06:16:47,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:47,020 INFO L225 Difference]: With dead ends: 875 [2020-10-20 06:16:47,021 INFO L226 Difference]: Without dead ends: 875 [2020-10-20 06:16:47,021 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 06:16:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2020-10-20 06:16:47,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 874. [2020-10-20 06:16:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-20 06:16:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1336 transitions. [2020-10-20 06:16:47,041 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1336 transitions. Word has length 25 [2020-10-20 06:16:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:47,041 INFO L481 AbstractCegarLoop]: Abstraction has 874 states and 1336 transitions. [2020-10-20 06:16:47,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1336 transitions. [2020-10-20 06:16:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 06:16:47,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:47,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:47,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-20 06:16:47,044 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:47,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1627252566, now seen corresponding path program 1 times [2020-10-20 06:16:47,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:47,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534051505] [2020-10-20 06:16:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:47,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:47,108 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 06:16:47,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534051505] [2020-10-20 06:16:47,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:47,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:47,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348982155] [2020-10-20 06:16:47,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:47,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:47,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:47,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:47,111 INFO L87 Difference]: Start difference. First operand 874 states and 1336 transitions. Second operand 4 states. [2020-10-20 06:16:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:47,252 INFO L93 Difference]: Finished difference Result 891 states and 1337 transitions. [2020-10-20 06:16:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:47,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-20 06:16:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:47,258 INFO L225 Difference]: With dead ends: 891 [2020-10-20 06:16:47,258 INFO L226 Difference]: Without dead ends: 891 [2020-10-20 06:16:47,258 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 06:16:47,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-10-20 06:16:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 890. [2020-10-20 06:16:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2020-10-20 06:16:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1336 transitions. [2020-10-20 06:16:47,281 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1336 transitions. Word has length 26 [2020-10-20 06:16:47,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:47,281 INFO L481 AbstractCegarLoop]: Abstraction has 890 states and 1336 transitions. [2020-10-20 06:16:47,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1336 transitions. [2020-10-20 06:16:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 06:16:47,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:47,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:47,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-20 06:16:47,283 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:47,284 INFO L82 PathProgramCache]: Analyzing trace with hash 616135316, now seen corresponding path program 1 times [2020-10-20 06:16:47,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:47,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368572602] [2020-10-20 06:16:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:47,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:47,329 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 06:16:47,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368572602] [2020-10-20 06:16:47,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:47,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:47,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193122302] [2020-10-20 06:16:47,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:47,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:47,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:47,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:47,331 INFO L87 Difference]: Start difference. First operand 890 states and 1336 transitions. Second operand 4 states. [2020-10-20 06:16:47,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:47,459 INFO L93 Difference]: Finished difference Result 1547 states and 2329 transitions. [2020-10-20 06:16:47,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:47,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-20 06:16:47,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:47,467 INFO L225 Difference]: With dead ends: 1547 [2020-10-20 06:16:47,468 INFO L226 Difference]: Without dead ends: 1547 [2020-10-20 06:16:47,468 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 06:16:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-10-20 06:16:47,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1290. [2020-10-20 06:16:47,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1290 states. [2020-10-20 06:16:47,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1880 transitions. [2020-10-20 06:16:47,500 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1880 transitions. Word has length 26 [2020-10-20 06:16:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:47,500 INFO L481 AbstractCegarLoop]: Abstraction has 1290 states and 1880 transitions. [2020-10-20 06:16:47,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1880 transitions. [2020-10-20 06:16:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 06:16:47,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:47,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:47,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-20 06:16:47,503 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:47,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:47,504 INFO L82 PathProgramCache]: Analyzing trace with hash 29329302, now seen corresponding path program 1 times [2020-10-20 06:16:47,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:47,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940253223] [2020-10-20 06:16:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:47,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:47,545 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 06:16:47,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940253223] [2020-10-20 06:16:47,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:47,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:47,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437491985] [2020-10-20 06:16:47,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:47,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:47,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:47,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:47,547 INFO L87 Difference]: Start difference. First operand 1290 states and 1880 transitions. Second operand 4 states. [2020-10-20 06:16:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:47,689 INFO L93 Difference]: Finished difference Result 1707 states and 2441 transitions. [2020-10-20 06:16:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:47,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-20 06:16:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:47,697 INFO L225 Difference]: With dead ends: 1707 [2020-10-20 06:16:47,697 INFO L226 Difference]: Without dead ends: 1707 [2020-10-20 06:16:47,698 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 06:16:47,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-10-20 06:16:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1706. [2020-10-20 06:16:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1706 states. [2020-10-20 06:16:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2440 transitions. [2020-10-20 06:16:47,747 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2440 transitions. Word has length 26 [2020-10-20 06:16:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:47,747 INFO L481 AbstractCegarLoop]: Abstraction has 1706 states and 2440 transitions. [2020-10-20 06:16:47,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:47,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2440 transitions. [2020-10-20 06:16:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 06:16:47,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:47,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:47,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-20 06:16:47,750 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:47,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:47,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1926995975, now seen corresponding path program 1 times [2020-10-20 06:16:47,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:47,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974112049] [2020-10-20 06:16:47,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:47,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:47,809 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 06:16:47,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974112049] [2020-10-20 06:16:47,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:47,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:47,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37003799] [2020-10-20 06:16:47,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:47,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:47,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:47,811 INFO L87 Difference]: Start difference. First operand 1706 states and 2440 transitions. Second operand 4 states. [2020-10-20 06:16:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:47,958 INFO L93 Difference]: Finished difference Result 1739 states and 2441 transitions. [2020-10-20 06:16:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:47,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-20 06:16:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:47,966 INFO L225 Difference]: With dead ends: 1739 [2020-10-20 06:16:47,966 INFO L226 Difference]: Without dead ends: 1739 [2020-10-20 06:16:47,967 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 06:16:47,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2020-10-20 06:16:47,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1738. [2020-10-20 06:16:47,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2020-10-20 06:16:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2440 transitions. [2020-10-20 06:16:48,004 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2440 transitions. Word has length 27 [2020-10-20 06:16:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:48,004 INFO L481 AbstractCegarLoop]: Abstraction has 1738 states and 2440 transitions. [2020-10-20 06:16:48,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2440 transitions. [2020-10-20 06:16:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 06:16:48,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:48,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:48,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-20 06:16:48,007 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:48,007 INFO L82 PathProgramCache]: Analyzing trace with hash 915878725, now seen corresponding path program 1 times [2020-10-20 06:16:48,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:48,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47192912] [2020-10-20 06:16:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:48,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:48,060 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 06:16:48,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47192912] [2020-10-20 06:16:48,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:48,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:48,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106531086] [2020-10-20 06:16:48,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:48,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:48,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:48,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:48,063 INFO L87 Difference]: Start difference. First operand 1738 states and 2440 transitions. Second operand 4 states. [2020-10-20 06:16:48,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:48,215 INFO L93 Difference]: Finished difference Result 2955 states and 4137 transitions. [2020-10-20 06:16:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:48,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-20 06:16:48,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:48,228 INFO L225 Difference]: With dead ends: 2955 [2020-10-20 06:16:48,228 INFO L226 Difference]: Without dead ends: 2955 [2020-10-20 06:16:48,228 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 06:16:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2020-10-20 06:16:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2570. [2020-10-20 06:16:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2570 states. [2020-10-20 06:16:48,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 3496 transitions. [2020-10-20 06:16:48,281 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 3496 transitions. Word has length 27 [2020-10-20 06:16:48,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:48,282 INFO L481 AbstractCegarLoop]: Abstraction has 2570 states and 3496 transitions. [2020-10-20 06:16:48,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:48,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 3496 transitions. [2020-10-20 06:16:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 06:16:48,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:48,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:48,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-20 06:16:48,287 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:48,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:48,287 INFO L82 PathProgramCache]: Analyzing trace with hash 329072711, now seen corresponding path program 1 times [2020-10-20 06:16:48,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:48,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088701628] [2020-10-20 06:16:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:48,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:48,324 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 06:16:48,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088701628] [2020-10-20 06:16:48,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:48,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:48,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882385490] [2020-10-20 06:16:48,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:48,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:48,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:48,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:48,326 INFO L87 Difference]: Start difference. First operand 2570 states and 3496 transitions. Second operand 4 states. [2020-10-20 06:16:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:48,474 INFO L93 Difference]: Finished difference Result 3339 states and 4425 transitions. [2020-10-20 06:16:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:48,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-20 06:16:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:48,490 INFO L225 Difference]: With dead ends: 3339 [2020-10-20 06:16:48,490 INFO L226 Difference]: Without dead ends: 3339 [2020-10-20 06:16:48,490 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 06:16:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2020-10-20 06:16:48,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3338. [2020-10-20 06:16:48,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3338 states. [2020-10-20 06:16:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4424 transitions. [2020-10-20 06:16:48,560 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4424 transitions. Word has length 27 [2020-10-20 06:16:48,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:48,561 INFO L481 AbstractCegarLoop]: Abstraction has 3338 states and 4424 transitions. [2020-10-20 06:16:48,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:48,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4424 transitions. [2020-10-20 06:16:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 06:16:48,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:48,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:48,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-20 06:16:48,566 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:48,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1665849663, now seen corresponding path program 1 times [2020-10-20 06:16:48,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:48,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220032042] [2020-10-20 06:16:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:48,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:48,618 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 06:16:48,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220032042] [2020-10-20 06:16:48,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:48,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:48,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510705936] [2020-10-20 06:16:48,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:48,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:48,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:48,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:48,621 INFO L87 Difference]: Start difference. First operand 3338 states and 4424 transitions. Second operand 4 states. [2020-10-20 06:16:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:48,753 INFO L93 Difference]: Finished difference Result 3403 states and 4425 transitions. [2020-10-20 06:16:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:48,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-20 06:16:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:48,766 INFO L225 Difference]: With dead ends: 3403 [2020-10-20 06:16:48,767 INFO L226 Difference]: Without dead ends: 3403 [2020-10-20 06:16:48,768 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 06:16:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2020-10-20 06:16:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3402. [2020-10-20 06:16:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3402 states. [2020-10-20 06:16:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 4424 transitions. [2020-10-20 06:16:48,834 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 4424 transitions. Word has length 28 [2020-10-20 06:16:48,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:48,835 INFO L481 AbstractCegarLoop]: Abstraction has 3402 states and 4424 transitions. [2020-10-20 06:16:48,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 4424 transitions. [2020-10-20 06:16:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 06:16:48,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:48,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:48,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-20 06:16:48,841 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1618000383, now seen corresponding path program 1 times [2020-10-20 06:16:48,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:48,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892214817] [2020-10-20 06:16:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:48,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:48,887 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 06:16:48,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892214817] [2020-10-20 06:16:48,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:48,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:48,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102855241] [2020-10-20 06:16:48,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:48,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:48,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:48,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:48,889 INFO L87 Difference]: Start difference. First operand 3402 states and 4424 transitions. Second operand 4 states. [2020-10-20 06:16:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:49,045 INFO L93 Difference]: Finished difference Result 5643 states and 7241 transitions. [2020-10-20 06:16:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:49,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-20 06:16:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:49,066 INFO L225 Difference]: With dead ends: 5643 [2020-10-20 06:16:49,066 INFO L226 Difference]: Without dead ends: 5643 [2020-10-20 06:16:49,067 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 06:16:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2020-10-20 06:16:49,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5130. [2020-10-20 06:16:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5130 states. [2020-10-20 06:16:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 6472 transitions. [2020-10-20 06:16:49,144 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 6472 transitions. Word has length 28 [2020-10-20 06:16:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:49,144 INFO L481 AbstractCegarLoop]: Abstraction has 5130 states and 6472 transitions. [2020-10-20 06:16:49,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 6472 transitions. [2020-10-20 06:16:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 06:16:49,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:49,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:49,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-20 06:16:49,152 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:49,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:49,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1031194369, now seen corresponding path program 1 times [2020-10-20 06:16:49,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:49,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398761626] [2020-10-20 06:16:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:49,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:49,189 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 06:16:49,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398761626] [2020-10-20 06:16:49,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:49,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:49,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345778639] [2020-10-20 06:16:49,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:49,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:49,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:49,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:49,191 INFO L87 Difference]: Start difference. First operand 5130 states and 6472 transitions. Second operand 4 states. [2020-10-20 06:16:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:49,339 INFO L93 Difference]: Finished difference Result 6539 states and 7945 transitions. [2020-10-20 06:16:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:49,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-20 06:16:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:49,363 INFO L225 Difference]: With dead ends: 6539 [2020-10-20 06:16:49,364 INFO L226 Difference]: Without dead ends: 6539 [2020-10-20 06:16:49,364 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 06:16:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2020-10-20 06:16:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6538. [2020-10-20 06:16:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6538 states. [2020-10-20 06:16:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6538 states to 6538 states and 7944 transitions. [2020-10-20 06:16:49,691 INFO L78 Accepts]: Start accepts. Automaton has 6538 states and 7944 transitions. Word has length 28 [2020-10-20 06:16:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:49,691 INFO L481 AbstractCegarLoop]: Abstraction has 6538 states and 7944 transitions. [2020-10-20 06:16:49,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 6538 states and 7944 transitions. [2020-10-20 06:16:49,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 06:16:49,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:49,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:49,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-20 06:16:49,706 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:49,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:49,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1374904174, now seen corresponding path program 1 times [2020-10-20 06:16:49,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:49,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880626661] [2020-10-20 06:16:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:49,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:49,756 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 06:16:49,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880626661] [2020-10-20 06:16:49,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:49,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:49,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14157327] [2020-10-20 06:16:49,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:49,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:49,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:49,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:49,758 INFO L87 Difference]: Start difference. First operand 6538 states and 7944 transitions. Second operand 4 states. [2020-10-20 06:16:49,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:49,880 INFO L93 Difference]: Finished difference Result 6667 states and 7945 transitions. [2020-10-20 06:16:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:49,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-20 06:16:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:49,891 INFO L225 Difference]: With dead ends: 6667 [2020-10-20 06:16:49,891 INFO L226 Difference]: Without dead ends: 6667 [2020-10-20 06:16:49,892 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 06:16:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2020-10-20 06:16:50,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6666. [2020-10-20 06:16:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6666 states. [2020-10-20 06:16:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 7944 transitions. [2020-10-20 06:16:50,070 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 7944 transitions. Word has length 29 [2020-10-20 06:16:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:50,070 INFO L481 AbstractCegarLoop]: Abstraction has 6666 states and 7944 transitions. [2020-10-20 06:16:50,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:50,071 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 7944 transitions. [2020-10-20 06:16:50,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 06:16:50,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:50,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:50,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-20 06:16:50,083 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:50,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:50,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1908945872, now seen corresponding path program 1 times [2020-10-20 06:16:50,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:50,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361950442] [2020-10-20 06:16:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:50,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:50,134 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 06:16:50,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361950442] [2020-10-20 06:16:50,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:50,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:50,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634367914] [2020-10-20 06:16:50,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:50,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:50,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:50,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:50,138 INFO L87 Difference]: Start difference. First operand 6666 states and 7944 transitions. Second operand 4 states. [2020-10-20 06:16:50,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:50,292 INFO L93 Difference]: Finished difference Result 10762 states and 12424 transitions. [2020-10-20 06:16:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:50,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-20 06:16:50,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:50,313 INFO L225 Difference]: With dead ends: 10762 [2020-10-20 06:16:50,313 INFO L226 Difference]: Without dead ends: 10762 [2020-10-20 06:16:50,314 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 06:16:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2020-10-20 06:16:50,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 10250. [2020-10-20 06:16:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10250 states. [2020-10-20 06:16:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10250 states to 10250 states and 11912 transitions. [2020-10-20 06:16:50,714 INFO L78 Accepts]: Start accepts. Automaton has 10250 states and 11912 transitions. Word has length 29 [2020-10-20 06:16:50,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:50,714 INFO L481 AbstractCegarLoop]: Abstraction has 10250 states and 11912 transitions. [2020-10-20 06:16:50,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:50,714 INFO L276 IsEmpty]: Start isEmpty. Operand 10250 states and 11912 transitions. [2020-10-20 06:16:50,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 06:16:50,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:50,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:50,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-20 06:16:50,731 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:50,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:50,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1322139858, now seen corresponding path program 1 times [2020-10-20 06:16:50,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:50,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50105805] [2020-10-20 06:16:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:50,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:50,808 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 06:16:50,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50105805] [2020-10-20 06:16:50,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:50,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:50,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566513982] [2020-10-20 06:16:50,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:50,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:50,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:50,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:50,810 INFO L87 Difference]: Start difference. First operand 10250 states and 11912 transitions. Second operand 4 states. [2020-10-20 06:16:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:50,938 INFO L93 Difference]: Finished difference Result 12807 states and 14086 transitions. [2020-10-20 06:16:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:50,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-20 06:16:50,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:50,939 INFO L225 Difference]: With dead ends: 12807 [2020-10-20 06:16:50,939 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 06:16:50,939 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 06:16:50,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 06:16:50,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 06:16:50,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 06:16:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 06:16:50,941 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-20 06:16:50,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:50,941 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:16:50,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:50,941 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:16:50,941 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 06:16:50,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-20 06:16:50,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:16:50 BoogieIcfgContainer [2020-10-20 06:16:50,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:16:50,948 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:16:50,948 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:16:50,949 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:16:50,949 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:43" (3/4) ... [2020-10-20 06:16:50,954 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 06:16:50,962 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-20 06:16:50,963 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-20 06:16:50,963 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-20 06:16:50,970 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-20 06:16:50,970 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 06:16:50,971 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 06:16:50,971 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 06:16:51,030 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:16:51,030 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:16:51,033 INFO L168 Benchmark]: Toolchain (without parser) took 8452.09 ms. Allocated memory was 35.7 MB in the beginning and 156.8 MB in the end (delta: 121.1 MB). Free memory was 15.9 MB in the beginning and 62.1 MB in the end (delta: -46.2 MB). Peak memory consumption was 74.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:51,034 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 34.1 MB. Free memory was 9.8 MB in the beginning and 9.8 MB in the end (delta: 45.8 kB). Peak memory consumption was 45.8 kB. Max. memory is 14.3 GB. [2020-10-20 06:16:51,034 INFO L168 Benchmark]: CACSL2BoogieTranslator took 399.63 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 15.0 MB in the beginning and 25.2 MB in the end (delta: -10.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:51,035 INFO L168 Benchmark]: Boogie Preprocessor took 36.03 ms. Allocated memory is still 44.0 MB. Free memory was 25.2 MB in the beginning and 23.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:51,035 INFO L168 Benchmark]: RCFGBuilder took 379.67 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 23.1 MB in the beginning and 14.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:51,036 INFO L168 Benchmark]: TraceAbstraction took 7542.59 ms. Allocated memory was 45.6 MB in the beginning and 156.8 MB in the end (delta: 111.1 MB). Free memory was 13.8 MB in the beginning and 67.5 MB in the end (delta: -53.6 MB). Peak memory consumption was 57.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:51,036 INFO L168 Benchmark]: Witness Printer took 82.58 ms. Allocated memory is still 156.8 MB. Free memory was 67.5 MB in the beginning and 62.1 MB in the end (delta: 5.3 MB). Peak memory consumption was 5.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:51,039 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 34.1 MB. Free memory was 9.8 MB in the beginning and 9.8 MB in the end (delta: 45.8 kB). Peak memory consumption was 45.8 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 399.63 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 15.0 MB in the beginning and 25.2 MB in the end (delta: -10.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 36.03 ms. Allocated memory is still 44.0 MB. Free memory was 25.2 MB in the beginning and 23.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * RCFGBuilder took 379.67 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 23.1 MB in the beginning and 14.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 7542.59 ms. Allocated memory was 45.6 MB in the beginning and 156.8 MB in the end (delta: 111.1 MB). Free memory was 13.8 MB in the beginning and 67.5 MB in the end (delta: -53.6 MB). Peak memory consumption was 57.5 MB. Max. memory is 14.3 GB. * Witness Printer took 82.58 ms. Allocated memory is still 156.8 MB. Free memory was 67.5 MB in the beginning and 62.1 MB in the end (delta: 5.3 MB). Peak memory consumption was 5.3 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, 47 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.4s, OverallIterations: 26, TraceHistogramMax: 1, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2026 SDtfs, 2884 SDslu, 193 SDs, 0 SdLazy, 1413 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 179 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10250occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 26 MinimizatonAttempts, 2049 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 640 NumberOfCodeBlocks, 640 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 614 ConstructedInterpolants, 0 QuantifiedInterpolants, 46238 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 26 InterpolantComputations, 26 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...