./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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_12.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 fbb7e06bf350f46f725ea0ddc5d1215829061b3a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:23:32,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:23:32,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:23:32,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:23:32,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:23:32,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:23:32,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:23:32,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:23:32,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:23:32,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:23:32,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:23:32,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:23:32,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:23:32,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:23:32,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:23:32,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:23:32,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:23:32,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:23:32,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:23:32,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:23:32,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:23:32,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:23:32,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:23:32,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:23:32,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:23:32,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:23:32,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:23:32,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:23:32,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:23:32,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:23:32,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:23:32,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:23:32,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:23:32,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:23:32,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:23:32,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:23:32,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:23:32,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:23:32,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:23:32,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:23:32,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:23:32,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:23:32,469 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:23:32,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:23:32,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:23:32,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:23:32,471 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:23:32,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:23:32,472 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:23:32,472 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:23:32,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:23:32,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:23:32,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:23:32,474 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:23:32,474 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:23:32,475 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:23:32,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:23:32,475 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:23:32,476 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:23:32,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:23:32,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:23:32,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:23:32,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:23:32,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:23:32,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:23:32,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:23:32,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:23:32,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:23:32,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:23:32,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:23:32,480 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 -> fbb7e06bf350f46f725ea0ddc5d1215829061b3a [2020-10-19 18:23:32,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:23:32,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:23:32,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:23:32,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:23:32,824 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:23:32,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_12.c [2020-10-19 18:23:32,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/009a190d7/321b8a4306a2437d8a9f525759fa04a8/FLAG4e1195233 [2020-10-19 18:23:33,304 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:23:33,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_12.c [2020-10-19 18:23:33,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/009a190d7/321b8a4306a2437d8a9f525759fa04a8/FLAG4e1195233 [2020-10-19 18:23:33,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/009a190d7/321b8a4306a2437d8a9f525759fa04a8 [2020-10-19 18:23:33,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:23:33,646 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:23:33,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:33,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:23:33,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:23:33,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:33" (1/1) ... [2020-10-19 18:23:33,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d77d9ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:33, skipping insertion in model container [2020-10-19 18:23:33,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:33" (1/1) ... [2020-10-19 18:23:33,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:23:33,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:23:33,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:33,900 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:23:33,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:33,948 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:23:33,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:33 WrapperNode [2020-10-19 18:23:33,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:33,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:23:33,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:23:33,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:23:34,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:33" (1/1) ... [2020-10-19 18:23:34,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:33" (1/1) ... [2020-10-19 18:23:34,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:33" (1/1) ... [2020-10-19 18:23:34,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:33" (1/1) ... [2020-10-19 18:23:34,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:33" (1/1) ... [2020-10-19 18:23:34,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:33" (1/1) ... [2020-10-19 18:23:34,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:33" (1/1) ... [2020-10-19 18:23:34,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:23:34,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:23:34,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:23:34,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:23:34,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:33" (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 [2020-10-19 18:23:34,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:23:34,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:23:34,123 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:23:34,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:23:34,123 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:23:34,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:23:34,124 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:23:34,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:23:34,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:23:34,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:23:34,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:23:34,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:23:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:23:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:23:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:23:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:23:34,474 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:23:34,475 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-19 18:23:34,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:34 BoogieIcfgContainer [2020-10-19 18:23:34,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:23:34,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:23:34,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:23:34,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:23:34,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:23:33" (1/3) ... [2020-10-19 18:23:34,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324d1c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:34, skipping insertion in model container [2020-10-19 18:23:34,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:33" (2/3) ... [2020-10-19 18:23:34,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324d1c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:34, skipping insertion in model container [2020-10-19 18:23:34,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:34" (3/3) ... [2020-10-19 18:23:34,486 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2020-10-19 18:23:34,498 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:23:34,505 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-19 18:23:34,519 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-19 18:23:34,542 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:23:34,542 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:23:34,542 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:23:34,543 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:23:34,543 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:23:34,543 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:23:34,543 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:23:34,543 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:23:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-19 18:23:34,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:23:34,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:34,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:34,572 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:34,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:34,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1172154548, now seen corresponding path program 1 times [2020-10-19 18:23:34,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:34,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091470230] [2020-10-19 18:23:34,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:34,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:34,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091470230] [2020-10-19 18:23:34,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:34,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:23:34,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027532320] [2020-10-19 18:23:34,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:23:34,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:34,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:23:34,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:23:34,840 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-10-19 18:23:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:34,893 INFO L93 Difference]: Finished difference Result 52 states and 87 transitions. [2020-10-19 18:23:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:23:34,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-19 18:23:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:34,906 INFO L225 Difference]: With dead ends: 52 [2020-10-19 18:23:34,907 INFO L226 Difference]: Without dead ends: 47 [2020-10-19 18:23:34,909 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 [2020-10-19 18:23:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-19 18:23:34,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-19 18:23:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-19 18:23:34,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 82 transitions. [2020-10-19 18:23:34,950 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 82 transitions. Word has length 9 [2020-10-19 18:23:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:34,951 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 82 transitions. [2020-10-19 18:23:34,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:23:34,951 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 82 transitions. [2020-10-19 18:23:34,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:34,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:34,953 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] [2020-10-19 18:23:34,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:23:34,954 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:34,955 INFO L82 PathProgramCache]: Analyzing trace with hash 120209725, now seen corresponding path program 1 times [2020-10-19 18:23:34,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:34,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987111275] [2020-10-19 18:23:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:35,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:35,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987111275] [2020-10-19 18:23:35,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:35,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:35,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422216380] [2020-10-19 18:23:35,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:35,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:35,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:35,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:35,092 INFO L87 Difference]: Start difference. First operand 47 states and 82 transitions. Second operand 4 states. [2020-10-19 18:23:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:35,379 INFO L93 Difference]: Finished difference Result 85 states and 154 transitions. [2020-10-19 18:23:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:35,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:35,383 INFO L225 Difference]: With dead ends: 85 [2020-10-19 18:23:35,383 INFO L226 Difference]: Without dead ends: 85 [2020-10-19 18:23:35,387 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 [2020-10-19 18:23:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-19 18:23:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2020-10-19 18:23:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-19 18:23:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 107 transitions. [2020-10-19 18:23:35,408 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 107 transitions. Word has length 24 [2020-10-19 18:23:35,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:35,410 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 107 transitions. [2020-10-19 18:23:35,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 107 transitions. [2020-10-19 18:23:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:35,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:35,414 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] [2020-10-19 18:23:35,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:23:35,415 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:35,416 INFO L82 PathProgramCache]: Analyzing trace with hash -900858629, now seen corresponding path program 1 times [2020-10-19 18:23:35,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:35,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315151994] [2020-10-19 18:23:35,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:35,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:35,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315151994] [2020-10-19 18:23:35,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:35,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:35,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597605369] [2020-10-19 18:23:35,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:35,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:35,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:35,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:35,547 INFO L87 Difference]: Start difference. First operand 60 states and 107 transitions. Second operand 4 states. [2020-10-19 18:23:35,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:35,735 INFO L93 Difference]: Finished difference Result 85 states and 152 transitions. [2020-10-19 18:23:35,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:35,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:35,738 INFO L225 Difference]: With dead ends: 85 [2020-10-19 18:23:35,738 INFO L226 Difference]: Without dead ends: 85 [2020-10-19 18:23:35,738 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 [2020-10-19 18:23:35,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-19 18:23:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-19 18:23:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-19 18:23:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 151 transitions. [2020-10-19 18:23:35,749 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 151 transitions. Word has length 24 [2020-10-19 18:23:35,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:35,750 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 151 transitions. [2020-10-19 18:23:35,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:35,750 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 151 transitions. [2020-10-19 18:23:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:35,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:35,752 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] [2020-10-19 18:23:35,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:23:35,752 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:35,753 INFO L82 PathProgramCache]: Analyzing trace with hash -561878445, now seen corresponding path program 1 times [2020-10-19 18:23:35,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:35,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255546975] [2020-10-19 18:23:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:35,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:35,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255546975] [2020-10-19 18:23:35,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:35,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:35,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814092821] [2020-10-19 18:23:35,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:35,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:35,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:35,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:35,854 INFO L87 Difference]: Start difference. First operand 84 states and 151 transitions. Second operand 4 states. [2020-10-19 18:23:36,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:36,055 INFO L93 Difference]: Finished difference Result 88 states and 154 transitions. [2020-10-19 18:23:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:36,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:36,058 INFO L225 Difference]: With dead ends: 88 [2020-10-19 18:23:36,058 INFO L226 Difference]: Without dead ends: 88 [2020-10-19 18:23:36,059 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 [2020-10-19 18:23:36,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-19 18:23:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-19 18:23:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-19 18:23:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 153 transitions. [2020-10-19 18:23:36,075 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 153 transitions. Word has length 25 [2020-10-19 18:23:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:36,076 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 153 transitions. [2020-10-19 18:23:36,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 153 transitions. [2020-10-19 18:23:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:36,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:36,079 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] [2020-10-19 18:23:36,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:23:36,080 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:36,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:36,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2144740949, now seen corresponding path program 1 times [2020-10-19 18:23:36,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:36,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634297239] [2020-10-19 18:23:36,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:36,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:36,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634297239] [2020-10-19 18:23:36,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:36,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:36,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304030498] [2020-10-19 18:23:36,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:36,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:36,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:36,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:36,199 INFO L87 Difference]: Start difference. First operand 87 states and 153 transitions. Second operand 4 states. [2020-10-19 18:23:36,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:36,364 INFO L93 Difference]: Finished difference Result 161 states and 287 transitions. [2020-10-19 18:23:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:36,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:36,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:36,367 INFO L225 Difference]: With dead ends: 161 [2020-10-19 18:23:36,367 INFO L226 Difference]: Without dead ends: 161 [2020-10-19 18:23:36,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:36,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-19 18:23:36,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-19 18:23:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-19 18:23:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 286 transitions. [2020-10-19 18:23:36,378 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 286 transitions. Word has length 25 [2020-10-19 18:23:36,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:36,379 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 286 transitions. [2020-10-19 18:23:36,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 286 transitions. [2020-10-19 18:23:36,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:36,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:36,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:36,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:23:36,382 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:36,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:36,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1129157993, now seen corresponding path program 1 times [2020-10-19 18:23:36,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:36,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111485764] [2020-10-19 18:23:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:36,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:36,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111485764] [2020-10-19 18:23:36,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:36,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:36,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764923233] [2020-10-19 18:23:36,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:36,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:36,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:36,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:36,448 INFO L87 Difference]: Start difference. First operand 160 states and 286 transitions. Second operand 4 states. [2020-10-19 18:23:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:36,609 INFO L93 Difference]: Finished difference Result 205 states and 369 transitions. [2020-10-19 18:23:36,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:36,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:36,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:36,612 INFO L225 Difference]: With dead ends: 205 [2020-10-19 18:23:36,612 INFO L226 Difference]: Without dead ends: 205 [2020-10-19 18:23:36,613 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 [2020-10-19 18:23:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-19 18:23:36,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2020-10-19 18:23:36,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-19 18:23:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 284 transitions. [2020-10-19 18:23:36,622 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 284 transitions. Word has length 25 [2020-10-19 18:23:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:36,623 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 284 transitions. [2020-10-19 18:23:36,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 284 transitions. [2020-10-19 18:23:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:23:36,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:36,625 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] [2020-10-19 18:23:36,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 18:23:36,626 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:36,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2069057926, now seen corresponding path program 1 times [2020-10-19 18:23:36,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:36,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41662289] [2020-10-19 18:23:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:36,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:36,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41662289] [2020-10-19 18:23:36,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:36,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:36,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204049294] [2020-10-19 18:23:36,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:36,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:36,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:36,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:36,698 INFO L87 Difference]: Start difference. First operand 160 states and 284 transitions. Second operand 4 states. [2020-10-19 18:23:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:36,842 INFO L93 Difference]: Finished difference Result 297 states and 535 transitions. [2020-10-19 18:23:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:36,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-19 18:23:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:36,845 INFO L225 Difference]: With dead ends: 297 [2020-10-19 18:23:36,845 INFO L226 Difference]: Without dead ends: 297 [2020-10-19 18:23:36,845 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 [2020-10-19 18:23:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-19 18:23:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 216. [2020-10-19 18:23:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-19 18:23:36,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 382 transitions. [2020-10-19 18:23:36,857 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 382 transitions. Word has length 26 [2020-10-19 18:23:36,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:36,857 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 382 transitions. [2020-10-19 18:23:36,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 382 transitions. [2020-10-19 18:23:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:23:36,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:36,860 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] [2020-10-19 18:23:36,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:23:36,861 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:36,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:36,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1047989572, now seen corresponding path program 1 times [2020-10-19 18:23:36,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:36,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446578545] [2020-10-19 18:23:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:36,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:36,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446578545] [2020-10-19 18:23:36,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:36,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:36,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970698048] [2020-10-19 18:23:36,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:36,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:36,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:36,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:36,915 INFO L87 Difference]: Start difference. First operand 216 states and 382 transitions. Second operand 4 states. [2020-10-19 18:23:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:37,090 INFO L93 Difference]: Finished difference Result 305 states and 537 transitions. [2020-10-19 18:23:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:37,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-19 18:23:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:37,093 INFO L225 Difference]: With dead ends: 305 [2020-10-19 18:23:37,093 INFO L226 Difference]: Without dead ends: 305 [2020-10-19 18:23:37,093 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 [2020-10-19 18:23:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-19 18:23:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2020-10-19 18:23:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-19 18:23:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 536 transitions. [2020-10-19 18:23:37,101 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 536 transitions. Word has length 26 [2020-10-19 18:23:37,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:37,102 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 536 transitions. [2020-10-19 18:23:37,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:37,102 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 536 transitions. [2020-10-19 18:23:37,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:23:37,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:37,110 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] [2020-10-19 18:23:37,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 18:23:37,110 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:37,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:37,111 INFO L82 PathProgramCache]: Analyzing trace with hash -277105216, now seen corresponding path program 1 times [2020-10-19 18:23:37,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:37,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054827927] [2020-10-19 18:23:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:37,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:37,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054827927] [2020-10-19 18:23:37,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:37,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:37,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747108184] [2020-10-19 18:23:37,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:37,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:37,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:37,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:37,186 INFO L87 Difference]: Start difference. First operand 304 states and 536 transitions. Second operand 4 states. [2020-10-19 18:23:37,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:37,335 INFO L93 Difference]: Finished difference Result 311 states and 541 transitions. [2020-10-19 18:23:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:37,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-19 18:23:37,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:37,338 INFO L225 Difference]: With dead ends: 311 [2020-10-19 18:23:37,339 INFO L226 Difference]: Without dead ends: 311 [2020-10-19 18:23:37,339 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 [2020-10-19 18:23:37,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-19 18:23:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2020-10-19 18:23:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-19 18:23:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 540 transitions. [2020-10-19 18:23:37,347 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 540 transitions. Word has length 27 [2020-10-19 18:23:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:37,348 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 540 transitions. [2020-10-19 18:23:37,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 540 transitions. [2020-10-19 18:23:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:23:37,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:37,350 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] [2020-10-19 18:23:37,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 18:23:37,350 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:37,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:37,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1865453118, now seen corresponding path program 1 times [2020-10-19 18:23:37,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:37,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011425335] [2020-10-19 18:23:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:37,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:37,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011425335] [2020-10-19 18:23:37,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:37,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:37,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135356816] [2020-10-19 18:23:37,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:37,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:37,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:37,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:37,399 INFO L87 Difference]: Start difference. First operand 310 states and 540 transitions. Second operand 4 states. [2020-10-19 18:23:37,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:37,563 INFO L93 Difference]: Finished difference Result 571 states and 1005 transitions. [2020-10-19 18:23:37,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:37,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-19 18:23:37,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:37,567 INFO L225 Difference]: With dead ends: 571 [2020-10-19 18:23:37,567 INFO L226 Difference]: Without dead ends: 571 [2020-10-19 18:23:37,568 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 [2020-10-19 18:23:37,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-10-19 18:23:37,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 426. [2020-10-19 18:23:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-19 18:23:37,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 732 transitions. [2020-10-19 18:23:37,579 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 732 transitions. Word has length 27 [2020-10-19 18:23:37,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:37,579 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 732 transitions. [2020-10-19 18:23:37,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 732 transitions. [2020-10-19 18:23:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:23:37,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:37,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:37,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 18:23:37,582 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:37,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1408445824, now seen corresponding path program 1 times [2020-10-19 18:23:37,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:37,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575494374] [2020-10-19 18:23:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:37,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:37,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575494374] [2020-10-19 18:23:37,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:37,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:37,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325774637] [2020-10-19 18:23:37,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:37,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:37,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:37,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:37,635 INFO L87 Difference]: Start difference. First operand 426 states and 732 transitions. Second operand 4 states. [2020-10-19 18:23:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:37,777 INFO L93 Difference]: Finished difference Result 595 states and 1017 transitions. [2020-10-19 18:23:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:37,778 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-19 18:23:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:37,782 INFO L225 Difference]: With dead ends: 595 [2020-10-19 18:23:37,782 INFO L226 Difference]: Without dead ends: 595 [2020-10-19 18:23:37,783 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 [2020-10-19 18:23:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-19 18:23:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 594. [2020-10-19 18:23:37,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 594 states. [2020-10-19 18:23:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1016 transitions. [2020-10-19 18:23:37,797 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1016 transitions. Word has length 27 [2020-10-19 18:23:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:37,797 INFO L481 AbstractCegarLoop]: Abstraction has 594 states and 1016 transitions. [2020-10-19 18:23:37,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:37,798 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1016 transitions. [2020-10-19 18:23:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 18:23:37,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:37,799 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] [2020-10-19 18:23:37,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 18:23:37,800 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:37,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:37,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1987852721, now seen corresponding path program 1 times [2020-10-19 18:23:37,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:37,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373570205] [2020-10-19 18:23:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:37,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:37,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373570205] [2020-10-19 18:23:37,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:37,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:37,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443137587] [2020-10-19 18:23:37,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:37,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:37,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:37,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:37,847 INFO L87 Difference]: Start difference. First operand 594 states and 1016 transitions. Second operand 4 states. [2020-10-19 18:23:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:37,982 INFO L93 Difference]: Finished difference Result 603 states and 1017 transitions. [2020-10-19 18:23:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:37,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-19 18:23:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:37,987 INFO L225 Difference]: With dead ends: 603 [2020-10-19 18:23:37,988 INFO L226 Difference]: Without dead ends: 603 [2020-10-19 18:23:37,988 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 [2020-10-19 18:23:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-19 18:23:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 602. [2020-10-19 18:23:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-10-19 18:23:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1016 transitions. [2020-10-19 18:23:38,001 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1016 transitions. Word has length 28 [2020-10-19 18:23:38,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:38,001 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 1016 transitions. [2020-10-19 18:23:38,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:38,001 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1016 transitions. [2020-10-19 18:23:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 18:23:38,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:38,002 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] [2020-10-19 18:23:38,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 18:23:38,003 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:38,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:38,003 INFO L82 PathProgramCache]: Analyzing trace with hash 718766673, now seen corresponding path program 1 times [2020-10-19 18:23:38,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:38,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686214142] [2020-10-19 18:23:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:38,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:38,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686214142] [2020-10-19 18:23:38,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:38,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:38,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117386966] [2020-10-19 18:23:38,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:38,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:38,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:38,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:38,051 INFO L87 Difference]: Start difference. First operand 602 states and 1016 transitions. Second operand 4 states. [2020-10-19 18:23:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:38,190 INFO L93 Difference]: Finished difference Result 1099 states and 1873 transitions. [2020-10-19 18:23:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:38,191 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-19 18:23:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:38,196 INFO L225 Difference]: With dead ends: 1099 [2020-10-19 18:23:38,197 INFO L226 Difference]: Without dead ends: 1099 [2020-10-19 18:23:38,197 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 [2020-10-19 18:23:38,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2020-10-19 18:23:38,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 842. [2020-10-19 18:23:38,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-10-19 18:23:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1392 transitions. [2020-10-19 18:23:38,215 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1392 transitions. Word has length 28 [2020-10-19 18:23:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:38,216 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1392 transitions. [2020-10-19 18:23:38,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1392 transitions. [2020-10-19 18:23:38,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 18:23:38,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:38,218 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] [2020-10-19 18:23:38,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 18:23:38,218 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:38,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:38,219 INFO L82 PathProgramCache]: Analyzing trace with hash -302301681, now seen corresponding path program 1 times [2020-10-19 18:23:38,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:38,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177713908] [2020-10-19 18:23:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:38,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:38,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177713908] [2020-10-19 18:23:38,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:38,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:38,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897564767] [2020-10-19 18:23:38,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:38,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:38,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:38,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:38,262 INFO L87 Difference]: Start difference. First operand 842 states and 1392 transitions. Second operand 4 states. [2020-10-19 18:23:38,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:38,425 INFO L93 Difference]: Finished difference Result 1163 states and 1913 transitions. [2020-10-19 18:23:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:38,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-19 18:23:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:38,433 INFO L225 Difference]: With dead ends: 1163 [2020-10-19 18:23:38,433 INFO L226 Difference]: Without dead ends: 1163 [2020-10-19 18:23:38,433 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 [2020-10-19 18:23:38,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2020-10-19 18:23:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1162. [2020-10-19 18:23:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-10-19 18:23:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1912 transitions. [2020-10-19 18:23:38,460 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1912 transitions. Word has length 28 [2020-10-19 18:23:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:38,460 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1912 transitions. [2020-10-19 18:23:38,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1912 transitions. [2020-10-19 18:23:38,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 18:23:38,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:38,463 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] [2020-10-19 18:23:38,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 18:23:38,463 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:38,464 INFO L82 PathProgramCache]: Analyzing trace with hash 813560043, now seen corresponding path program 1 times [2020-10-19 18:23:38,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:38,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661073849] [2020-10-19 18:23:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:38,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:38,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661073849] [2020-10-19 18:23:38,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:38,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:38,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801379408] [2020-10-19 18:23:38,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:38,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:38,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:38,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:38,518 INFO L87 Difference]: Start difference. First operand 1162 states and 1912 transitions. Second operand 4 states. [2020-10-19 18:23:38,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:38,670 INFO L93 Difference]: Finished difference Result 1179 states and 1913 transitions. [2020-10-19 18:23:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:38,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-19 18:23:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:38,676 INFO L225 Difference]: With dead ends: 1179 [2020-10-19 18:23:38,676 INFO L226 Difference]: Without dead ends: 1179 [2020-10-19 18:23:38,677 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 [2020-10-19 18:23:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2020-10-19 18:23:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1178. [2020-10-19 18:23:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1178 states. [2020-10-19 18:23:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1912 transitions. [2020-10-19 18:23:38,699 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1912 transitions. Word has length 29 [2020-10-19 18:23:38,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:38,699 INFO L481 AbstractCegarLoop]: Abstraction has 1178 states and 1912 transitions. [2020-10-19 18:23:38,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:38,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1912 transitions. [2020-10-19 18:23:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 18:23:38,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:38,701 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] [2020-10-19 18:23:38,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-19 18:23:38,702 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:38,702 INFO L82 PathProgramCache]: Analyzing trace with hash -774787859, now seen corresponding path program 1 times [2020-10-19 18:23:38,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:38,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27444998] [2020-10-19 18:23:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:38,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:38,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27444998] [2020-10-19 18:23:38,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:38,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:38,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268168949] [2020-10-19 18:23:38,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:38,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:38,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:38,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:38,743 INFO L87 Difference]: Start difference. First operand 1178 states and 1912 transitions. Second operand 4 states. [2020-10-19 18:23:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:38,907 INFO L93 Difference]: Finished difference Result 2123 states and 3481 transitions. [2020-10-19 18:23:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:38,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-19 18:23:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:38,918 INFO L225 Difference]: With dead ends: 2123 [2020-10-19 18:23:38,918 INFO L226 Difference]: Without dead ends: 2123 [2020-10-19 18:23:38,919 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 [2020-10-19 18:23:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2020-10-19 18:23:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1674. [2020-10-19 18:23:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2020-10-19 18:23:38,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2648 transitions. [2020-10-19 18:23:38,980 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2648 transitions. Word has length 29 [2020-10-19 18:23:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:38,981 INFO L481 AbstractCegarLoop]: Abstraction has 1674 states and 2648 transitions. [2020-10-19 18:23:38,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2648 transitions. [2020-10-19 18:23:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 18:23:38,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:38,984 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] [2020-10-19 18:23:38,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-19 18:23:38,985 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:38,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:38,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1795856213, now seen corresponding path program 1 times [2020-10-19 18:23:38,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:38,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302924499] [2020-10-19 18:23:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:39,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:39,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302924499] [2020-10-19 18:23:39,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:39,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:39,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637531769] [2020-10-19 18:23:39,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:39,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:39,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:39,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:39,044 INFO L87 Difference]: Start difference. First operand 1674 states and 2648 transitions. Second operand 4 states. [2020-10-19 18:23:39,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:39,202 INFO L93 Difference]: Finished difference Result 2283 states and 3593 transitions. [2020-10-19 18:23:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:39,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-19 18:23:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:39,214 INFO L225 Difference]: With dead ends: 2283 [2020-10-19 18:23:39,214 INFO L226 Difference]: Without dead ends: 2283 [2020-10-19 18:23:39,215 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 [2020-10-19 18:23:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2020-10-19 18:23:39,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2282. [2020-10-19 18:23:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2020-10-19 18:23:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3592 transitions. [2020-10-19 18:23:39,268 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3592 transitions. Word has length 29 [2020-10-19 18:23:39,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:39,268 INFO L481 AbstractCegarLoop]: Abstraction has 2282 states and 3592 transitions. [2020-10-19 18:23:39,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:39,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3592 transitions. [2020-10-19 18:23:39,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 18:23:39,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:39,271 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, 1] [2020-10-19 18:23:39,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-19 18:23:39,272 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:39,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1758020378, now seen corresponding path program 1 times [2020-10-19 18:23:39,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:39,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141456628] [2020-10-19 18:23:39,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:39,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:39,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141456628] [2020-10-19 18:23:39,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:39,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:39,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023061608] [2020-10-19 18:23:39,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:39,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:39,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:39,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:39,339 INFO L87 Difference]: Start difference. First operand 2282 states and 3592 transitions. Second operand 4 states. [2020-10-19 18:23:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:39,482 INFO L93 Difference]: Finished difference Result 2315 states and 3593 transitions. [2020-10-19 18:23:39,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:39,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-19 18:23:39,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:39,492 INFO L225 Difference]: With dead ends: 2315 [2020-10-19 18:23:39,492 INFO L226 Difference]: Without dead ends: 2315 [2020-10-19 18:23:39,493 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 [2020-10-19 18:23:39,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2020-10-19 18:23:39,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2314. [2020-10-19 18:23:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-10-19 18:23:39,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3592 transitions. [2020-10-19 18:23:39,537 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3592 transitions. Word has length 30 [2020-10-19 18:23:39,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:39,538 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 3592 transitions. [2020-10-19 18:23:39,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3592 transitions. [2020-10-19 18:23:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 18:23:39,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:39,541 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, 1] [2020-10-19 18:23:39,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-19 18:23:39,541 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:39,541 INFO L82 PathProgramCache]: Analyzing trace with hash 169672476, now seen corresponding path program 1 times [2020-10-19 18:23:39,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:39,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64152528] [2020-10-19 18:23:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:39,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:39,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64152528] [2020-10-19 18:23:39,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:39,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:39,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318348446] [2020-10-19 18:23:39,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:39,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:39,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:39,584 INFO L87 Difference]: Start difference. First operand 2314 states and 3592 transitions. Second operand 4 states. [2020-10-19 18:23:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:39,743 INFO L93 Difference]: Finished difference Result 4107 states and 6441 transitions. [2020-10-19 18:23:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:39,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-19 18:23:39,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:39,764 INFO L225 Difference]: With dead ends: 4107 [2020-10-19 18:23:39,764 INFO L226 Difference]: Without dead ends: 4107 [2020-10-19 18:23:39,765 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 [2020-10-19 18:23:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2020-10-19 18:23:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3338. [2020-10-19 18:23:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3338 states. [2020-10-19 18:23:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 5032 transitions. [2020-10-19 18:23:39,835 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 5032 transitions. Word has length 30 [2020-10-19 18:23:39,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:39,836 INFO L481 AbstractCegarLoop]: Abstraction has 3338 states and 5032 transitions. [2020-10-19 18:23:39,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 5032 transitions. [2020-10-19 18:23:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 18:23:39,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:39,842 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, 1] [2020-10-19 18:23:39,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-19 18:23:39,842 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:39,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:39,843 INFO L82 PathProgramCache]: Analyzing trace with hash -851395878, now seen corresponding path program 1 times [2020-10-19 18:23:39,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:39,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643154150] [2020-10-19 18:23:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:39,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:39,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643154150] [2020-10-19 18:23:39,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:39,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:39,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484747025] [2020-10-19 18:23:39,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:39,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:39,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:39,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:39,886 INFO L87 Difference]: Start difference. First operand 3338 states and 5032 transitions. Second operand 4 states. [2020-10-19 18:23:40,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:40,022 INFO L93 Difference]: Finished difference Result 4491 states and 6729 transitions. [2020-10-19 18:23:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:40,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-19 18:23:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:40,041 INFO L225 Difference]: With dead ends: 4491 [2020-10-19 18:23:40,042 INFO L226 Difference]: Without dead ends: 4491 [2020-10-19 18:23:40,042 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 [2020-10-19 18:23:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2020-10-19 18:23:40,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 4490. [2020-10-19 18:23:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4490 states. [2020-10-19 18:23:40,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 6728 transitions. [2020-10-19 18:23:40,121 INFO L78 Accepts]: Start accepts. Automaton has 4490 states and 6728 transitions. Word has length 30 [2020-10-19 18:23:40,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:40,121 INFO L481 AbstractCegarLoop]: Abstraction has 4490 states and 6728 transitions. [2020-10-19 18:23:40,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 4490 states and 6728 transitions. [2020-10-19 18:23:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 18:23:40,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:40,127 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, 1, 1] [2020-10-19 18:23:40,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-19 18:23:40,128 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:40,128 INFO L82 PathProgramCache]: Analyzing trace with hash 971530262, now seen corresponding path program 1 times [2020-10-19 18:23:40,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:40,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949199331] [2020-10-19 18:23:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:40,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:40,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949199331] [2020-10-19 18:23:40,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:40,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:40,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860151288] [2020-10-19 18:23:40,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:40,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:40,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:40,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:40,169 INFO L87 Difference]: Start difference. First operand 4490 states and 6728 transitions. Second operand 4 states. [2020-10-19 18:23:40,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:40,299 INFO L93 Difference]: Finished difference Result 4555 states and 6729 transitions. [2020-10-19 18:23:40,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:40,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-19 18:23:40,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:40,318 INFO L225 Difference]: With dead ends: 4555 [2020-10-19 18:23:40,318 INFO L226 Difference]: Without dead ends: 4555 [2020-10-19 18:23:40,318 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 [2020-10-19 18:23:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2020-10-19 18:23:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 4554. [2020-10-19 18:23:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4554 states. [2020-10-19 18:23:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 6728 transitions. [2020-10-19 18:23:40,386 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 6728 transitions. Word has length 31 [2020-10-19 18:23:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:40,386 INFO L481 AbstractCegarLoop]: Abstraction has 4554 states and 6728 transitions. [2020-10-19 18:23:40,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 6728 transitions. [2020-10-19 18:23:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 18:23:40,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:40,391 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, 1, 1] [2020-10-19 18:23:40,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-19 18:23:40,392 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:40,392 INFO L82 PathProgramCache]: Analyzing trace with hash -616817640, now seen corresponding path program 1 times [2020-10-19 18:23:40,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:40,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385063296] [2020-10-19 18:23:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:40,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:40,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385063296] [2020-10-19 18:23:40,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:40,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:40,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943682272] [2020-10-19 18:23:40,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:40,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:40,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:40,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:40,437 INFO L87 Difference]: Start difference. First operand 4554 states and 6728 transitions. Second operand 4 states. [2020-10-19 18:23:40,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:40,603 INFO L93 Difference]: Finished difference Result 7947 states and 11849 transitions. [2020-10-19 18:23:40,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:40,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-19 18:23:40,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:40,630 INFO L225 Difference]: With dead ends: 7947 [2020-10-19 18:23:40,631 INFO L226 Difference]: Without dead ends: 7947 [2020-10-19 18:23:40,632 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 [2020-10-19 18:23:40,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2020-10-19 18:23:40,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 6666. [2020-10-19 18:23:40,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6666 states. [2020-10-19 18:23:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 9544 transitions. [2020-10-19 18:23:40,725 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 9544 transitions. Word has length 31 [2020-10-19 18:23:40,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:40,725 INFO L481 AbstractCegarLoop]: Abstraction has 6666 states and 9544 transitions. [2020-10-19 18:23:40,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 9544 transitions. [2020-10-19 18:23:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 18:23:40,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:40,734 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, 1, 1] [2020-10-19 18:23:40,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-19 18:23:40,735 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:40,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1637885994, now seen corresponding path program 1 times [2020-10-19 18:23:40,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:40,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606893772] [2020-10-19 18:23:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:40,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:40,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606893772] [2020-10-19 18:23:40,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:40,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:40,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828669957] [2020-10-19 18:23:40,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:40,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:40,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:40,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:40,787 INFO L87 Difference]: Start difference. First operand 6666 states and 9544 transitions. Second operand 4 states. [2020-10-19 18:23:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:40,931 INFO L93 Difference]: Finished difference Result 8843 states and 12553 transitions. [2020-10-19 18:23:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:40,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-19 18:23:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:40,950 INFO L225 Difference]: With dead ends: 8843 [2020-10-19 18:23:40,951 INFO L226 Difference]: Without dead ends: 8843 [2020-10-19 18:23:40,951 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 [2020-10-19 18:23:40,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2020-10-19 18:23:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8842. [2020-10-19 18:23:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8842 states. [2020-10-19 18:23:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8842 states to 8842 states and 12552 transitions. [2020-10-19 18:23:41,149 INFO L78 Accepts]: Start accepts. Automaton has 8842 states and 12552 transitions. Word has length 31 [2020-10-19 18:23:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:41,149 INFO L481 AbstractCegarLoop]: Abstraction has 8842 states and 12552 transitions. [2020-10-19 18:23:41,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 8842 states and 12552 transitions. [2020-10-19 18:23:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 18:23:41,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:41,160 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, 1, 1, 1] [2020-10-19 18:23:41,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-19 18:23:41,160 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:41,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1934816283, now seen corresponding path program 1 times [2020-10-19 18:23:41,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:41,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009714435] [2020-10-19 18:23:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:41,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:41,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009714435] [2020-10-19 18:23:41,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:41,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:41,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771021290] [2020-10-19 18:23:41,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:41,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:41,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:41,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:41,244 INFO L87 Difference]: Start difference. First operand 8842 states and 12552 transitions. Second operand 4 states. [2020-10-19 18:23:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:41,402 INFO L93 Difference]: Finished difference Result 8971 states and 12553 transitions. [2020-10-19 18:23:41,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:41,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-19 18:23:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:41,421 INFO L225 Difference]: With dead ends: 8971 [2020-10-19 18:23:41,421 INFO L226 Difference]: Without dead ends: 8971 [2020-10-19 18:23:41,422 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 [2020-10-19 18:23:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2020-10-19 18:23:41,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 8970. [2020-10-19 18:23:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8970 states. [2020-10-19 18:23:41,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8970 states to 8970 states and 12552 transitions. [2020-10-19 18:23:41,545 INFO L78 Accepts]: Start accepts. Automaton has 8970 states and 12552 transitions. Word has length 32 [2020-10-19 18:23:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:41,546 INFO L481 AbstractCegarLoop]: Abstraction has 8970 states and 12552 transitions. [2020-10-19 18:23:41,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:41,546 INFO L276 IsEmpty]: Start isEmpty. Operand 8970 states and 12552 transitions. [2020-10-19 18:23:41,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 18:23:41,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:41,556 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, 1, 1, 1] [2020-10-19 18:23:41,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-19 18:23:41,557 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:41,557 INFO L82 PathProgramCache]: Analyzing trace with hash 771803111, now seen corresponding path program 1 times [2020-10-19 18:23:41,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:41,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099665727] [2020-10-19 18:23:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:41,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:41,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099665727] [2020-10-19 18:23:41,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:41,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:41,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299447233] [2020-10-19 18:23:41,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:41,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:41,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:41,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:41,601 INFO L87 Difference]: Start difference. First operand 8970 states and 12552 transitions. Second operand 4 states. [2020-10-19 18:23:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:41,758 INFO L93 Difference]: Finished difference Result 15371 states and 21641 transitions. [2020-10-19 18:23:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:41,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-19 18:23:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:41,778 INFO L225 Difference]: With dead ends: 15371 [2020-10-19 18:23:41,779 INFO L226 Difference]: Without dead ends: 15371 [2020-10-19 18:23:41,779 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 [2020-10-19 18:23:41,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2020-10-19 18:23:41,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 13322. [2020-10-19 18:23:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13322 states. [2020-10-19 18:23:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13322 states to 13322 states and 18056 transitions. [2020-10-19 18:23:41,967 INFO L78 Accepts]: Start accepts. Automaton has 13322 states and 18056 transitions. Word has length 32 [2020-10-19 18:23:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:41,968 INFO L481 AbstractCegarLoop]: Abstraction has 13322 states and 18056 transitions. [2020-10-19 18:23:41,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 13322 states and 18056 transitions. [2020-10-19 18:23:41,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 18:23:41,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:41,998 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, 1, 1, 1] [2020-10-19 18:23:41,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-19 18:23:41,998 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:41,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:41,999 INFO L82 PathProgramCache]: Analyzing trace with hash -249265243, now seen corresponding path program 1 times [2020-10-19 18:23:41,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:41,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463068621] [2020-10-19 18:23:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:42,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:42,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463068621] [2020-10-19 18:23:42,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:42,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:42,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458488168] [2020-10-19 18:23:42,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:42,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:42,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:42,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:42,040 INFO L87 Difference]: Start difference. First operand 13322 states and 18056 transitions. Second operand 4 states. [2020-10-19 18:23:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:42,200 INFO L93 Difference]: Finished difference Result 17419 states and 23305 transitions. [2020-10-19 18:23:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:42,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-19 18:23:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:42,219 INFO L225 Difference]: With dead ends: 17419 [2020-10-19 18:23:42,219 INFO L226 Difference]: Without dead ends: 17419 [2020-10-19 18:23:42,220 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 [2020-10-19 18:23:42,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17419 states. [2020-10-19 18:23:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17419 to 17418. [2020-10-19 18:23:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17418 states. [2020-10-19 18:23:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17418 states to 17418 states and 23304 transitions. [2020-10-19 18:23:42,531 INFO L78 Accepts]: Start accepts. Automaton has 17418 states and 23304 transitions. Word has length 32 [2020-10-19 18:23:42,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:42,532 INFO L481 AbstractCegarLoop]: Abstraction has 17418 states and 23304 transitions. [2020-10-19 18:23:42,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 17418 states and 23304 transitions. [2020-10-19 18:23:42,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-19 18:23:42,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:42,548 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, 1, 1, 1, 1] [2020-10-19 18:23:42,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-19 18:23:42,548 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:42,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:42,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1837235391, now seen corresponding path program 1 times [2020-10-19 18:23:42,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:42,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510440325] [2020-10-19 18:23:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:42,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:42,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510440325] [2020-10-19 18:23:42,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:42,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:42,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537934260] [2020-10-19 18:23:42,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:42,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:42,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:42,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:42,591 INFO L87 Difference]: Start difference. First operand 17418 states and 23304 transitions. Second operand 4 states. [2020-10-19 18:23:42,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:42,744 INFO L93 Difference]: Finished difference Result 17675 states and 23305 transitions. [2020-10-19 18:23:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:42,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-19 18:23:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:42,758 INFO L225 Difference]: With dead ends: 17675 [2020-10-19 18:23:42,758 INFO L226 Difference]: Without dead ends: 17675 [2020-10-19 18:23:42,759 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 [2020-10-19 18:23:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17675 states. [2020-10-19 18:23:42,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17675 to 17674. [2020-10-19 18:23:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17674 states. [2020-10-19 18:23:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17674 states to 17674 states and 23304 transitions. [2020-10-19 18:23:42,945 INFO L78 Accepts]: Start accepts. Automaton has 17674 states and 23304 transitions. Word has length 33 [2020-10-19 18:23:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:42,946 INFO L481 AbstractCegarLoop]: Abstraction has 17674 states and 23304 transitions. [2020-10-19 18:23:42,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 17674 states and 23304 transitions. [2020-10-19 18:23:42,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-19 18:23:42,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:42,961 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, 1, 1, 1, 1] [2020-10-19 18:23:42,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-19 18:23:42,962 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:42,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:42,962 INFO L82 PathProgramCache]: Analyzing trace with hash 869384003, now seen corresponding path program 1 times [2020-10-19 18:23:42,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:42,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423400851] [2020-10-19 18:23:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:43,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:43,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423400851] [2020-10-19 18:23:43,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:43,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:43,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801707547] [2020-10-19 18:23:43,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:43,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:43,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:43,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:43,007 INFO L87 Difference]: Start difference. First operand 17674 states and 23304 transitions. Second operand 4 states. [2020-10-19 18:23:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:43,195 INFO L93 Difference]: Finished difference Result 34315 states and 43529 transitions. [2020-10-19 18:23:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:43,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-19 18:23:43,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:43,224 INFO L225 Difference]: With dead ends: 34315 [2020-10-19 18:23:43,224 INFO L226 Difference]: Without dead ends: 34315 [2020-10-19 18:23:43,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34315 states. [2020-10-19 18:23:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34315 to 34314. [2020-10-19 18:23:43,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34314 states. [2020-10-19 18:23:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34314 states to 34314 states and 43528 transitions. [2020-10-19 18:23:43,519 INFO L78 Accepts]: Start accepts. Automaton has 34314 states and 43528 transitions. Word has length 33 [2020-10-19 18:23:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:43,520 INFO L481 AbstractCegarLoop]: Abstraction has 34314 states and 43528 transitions. [2020-10-19 18:23:43,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:43,520 INFO L276 IsEmpty]: Start isEmpty. Operand 34314 states and 43528 transitions. [2020-10-19 18:23:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-19 18:23:43,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:43,538 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, 1, 1, 1, 1] [2020-10-19 18:23:43,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-19 18:23:43,539 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:43,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:43,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1890452357, now seen corresponding path program 1 times [2020-10-19 18:23:43,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:43,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864775910] [2020-10-19 18:23:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:43,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:43,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864775910] [2020-10-19 18:23:43,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:43,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:43,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148648654] [2020-10-19 18:23:43,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:43,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:43,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:43,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:43,588 INFO L87 Difference]: Start difference. First operand 34314 states and 43528 transitions. Second operand 4 states. [2020-10-19 18:23:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:44,065 INFO L93 Difference]: Finished difference Result 37387 states and 48137 transitions. [2020-10-19 18:23:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:44,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-19 18:23:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:44,105 INFO L225 Difference]: With dead ends: 37387 [2020-10-19 18:23:44,105 INFO L226 Difference]: Without dead ends: 37387 [2020-10-19 18:23:44,106 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 [2020-10-19 18:23:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37387 states. [2020-10-19 18:23:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37387 to 34314. [2020-10-19 18:23:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34314 states. [2020-10-19 18:23:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34314 states to 34314 states and 43016 transitions. [2020-10-19 18:23:44,466 INFO L78 Accepts]: Start accepts. Automaton has 34314 states and 43016 transitions. Word has length 33 [2020-10-19 18:23:44,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:44,466 INFO L481 AbstractCegarLoop]: Abstraction has 34314 states and 43016 transitions. [2020-10-19 18:23:44,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 34314 states and 43016 transitions. [2020-10-19 18:23:44,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-19 18:23:44,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:44,484 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, 1, 1, 1, 1, 1] [2020-10-19 18:23:44,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-19 18:23:44,485 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:44,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:44,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1187782832, now seen corresponding path program 1 times [2020-10-19 18:23:44,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:44,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744117173] [2020-10-19 18:23:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:44,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:44,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744117173] [2020-10-19 18:23:44,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:44,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:44,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025542030] [2020-10-19 18:23:44,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:44,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:44,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:44,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:44,528 INFO L87 Difference]: Start difference. First operand 34314 states and 43016 transitions. Second operand 4 states. [2020-10-19 18:23:44,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:44,746 INFO L93 Difference]: Finished difference Result 56843 states and 70665 transitions. [2020-10-19 18:23:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:44,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-19 18:23:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:44,791 INFO L225 Difference]: With dead ends: 56843 [2020-10-19 18:23:44,791 INFO L226 Difference]: Without dead ends: 56843 [2020-10-19 18:23:44,791 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 [2020-10-19 18:23:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56843 states. [2020-10-19 18:23:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56843 to 52746. [2020-10-19 18:23:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52746 states. [2020-10-19 18:23:45,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52746 states to 52746 states and 64520 transitions. [2020-10-19 18:23:45,488 INFO L78 Accepts]: Start accepts. Automaton has 52746 states and 64520 transitions. Word has length 34 [2020-10-19 18:23:45,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:45,489 INFO L481 AbstractCegarLoop]: Abstraction has 52746 states and 64520 transitions. [2020-10-19 18:23:45,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:45,489 INFO L276 IsEmpty]: Start isEmpty. Operand 52746 states and 64520 transitions. [2020-10-19 18:23:45,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-19 18:23:45,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:45,516 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, 1, 1, 1, 1, 1] [2020-10-19 18:23:45,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-19 18:23:45,517 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:45,517 INFO L82 PathProgramCache]: Analyzing trace with hash 166714478, now seen corresponding path program 1 times [2020-10-19 18:23:45,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:45,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441605912] [2020-10-19 18:23:45,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:45,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:45,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441605912] [2020-10-19 18:23:45,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:45,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:45,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727086771] [2020-10-19 18:23:45,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:45,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:45,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:45,566 INFO L87 Difference]: Start difference. First operand 52746 states and 64520 transitions. Second operand 4 states. [2020-10-19 18:23:45,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:45,816 INFO L93 Difference]: Finished difference Result 67083 states and 79881 transitions. [2020-10-19 18:23:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:45,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-19 18:23:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:45,865 INFO L225 Difference]: With dead ends: 67083 [2020-10-19 18:23:45,865 INFO L226 Difference]: Without dead ends: 67083 [2020-10-19 18:23:45,865 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 [2020-10-19 18:23:45,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67083 states. [2020-10-19 18:23:46,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67083 to 67082. [2020-10-19 18:23:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67082 states. [2020-10-19 18:23:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67082 states to 67082 states and 79880 transitions. [2020-10-19 18:23:46,349 INFO L78 Accepts]: Start accepts. Automaton has 67082 states and 79880 transitions. Word has length 34 [2020-10-19 18:23:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:46,349 INFO L481 AbstractCegarLoop]: Abstraction has 67082 states and 79880 transitions. [2020-10-19 18:23:46,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 67082 states and 79880 transitions. [2020-10-19 18:23:46,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-19 18:23:46,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:46,393 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, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:46,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-19 18:23:46,394 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:46,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:46,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1826744786, now seen corresponding path program 1 times [2020-10-19 18:23:46,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:46,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822167274] [2020-10-19 18:23:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:46,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:46,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822167274] [2020-10-19 18:23:46,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:46,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:46,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178803986] [2020-10-19 18:23:46,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:46,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:46,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:46,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:46,448 INFO L87 Difference]: Start difference. First operand 67082 states and 79880 transitions. Second operand 4 states. [2020-10-19 18:23:46,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:46,721 INFO L93 Difference]: Finished difference Result 68619 states and 80905 transitions. [2020-10-19 18:23:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:46,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-19 18:23:46,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:46,775 INFO L225 Difference]: With dead ends: 68619 [2020-10-19 18:23:46,776 INFO L226 Difference]: Without dead ends: 68619 [2020-10-19 18:23:46,776 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 [2020-10-19 18:23:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2020-10-19 18:23:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 68618. [2020-10-19 18:23:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68618 states. [2020-10-19 18:23:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68618 states to 68618 states and 80904 transitions. [2020-10-19 18:23:47,770 INFO L78 Accepts]: Start accepts. Automaton has 68618 states and 80904 transitions. Word has length 35 [2020-10-19 18:23:47,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:47,771 INFO L481 AbstractCegarLoop]: Abstraction has 68618 states and 80904 transitions. [2020-10-19 18:23:47,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:47,771 INFO L276 IsEmpty]: Start isEmpty. Operand 68618 states and 80904 transitions. [2020-10-19 18:23:47,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-19 18:23:47,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:47,794 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, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:47,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-19 18:23:47,795 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:47,795 INFO L82 PathProgramCache]: Analyzing trace with hash 879874608, now seen corresponding path program 1 times [2020-10-19 18:23:47,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:47,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704012365] [2020-10-19 18:23:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:47,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:47,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704012365] [2020-10-19 18:23:47,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:47,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:47,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817823317] [2020-10-19 18:23:47,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:47,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:47,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:47,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:47,842 INFO L87 Difference]: Start difference. First operand 68618 states and 80904 transitions. Second operand 4 states. [2020-10-19 18:23:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:48,287 INFO L93 Difference]: Finished difference Result 110602 states and 126984 transitions. [2020-10-19 18:23:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:48,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-19 18:23:48,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:48,434 INFO L225 Difference]: With dead ends: 110602 [2020-10-19 18:23:48,435 INFO L226 Difference]: Without dead ends: 110602 [2020-10-19 18:23:48,435 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 [2020-10-19 18:23:48,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110602 states. [2020-10-19 18:23:50,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110602 to 106506. [2020-10-19 18:23:50,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106506 states. [2020-10-19 18:23:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106506 states to 106506 states and 122888 transitions. [2020-10-19 18:23:50,586 INFO L78 Accepts]: Start accepts. Automaton has 106506 states and 122888 transitions. Word has length 35 [2020-10-19 18:23:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:50,587 INFO L481 AbstractCegarLoop]: Abstraction has 106506 states and 122888 transitions. [2020-10-19 18:23:50,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 106506 states and 122888 transitions. [2020-10-19 18:23:50,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-19 18:23:50,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:50,634 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, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:50,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-19 18:23:50,634 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:50,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:50,634 INFO L82 PathProgramCache]: Analyzing trace with hash -141193746, now seen corresponding path program 1 times [2020-10-19 18:23:50,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:50,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114357102] [2020-10-19 18:23:50,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:50,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:50,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114357102] [2020-10-19 18:23:50,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:50,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:50,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888158991] [2020-10-19 18:23:50,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:50,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:50,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:50,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:50,686 INFO L87 Difference]: Start difference. First operand 106506 states and 122888 transitions. Second operand 4 states. [2020-10-19 18:23:51,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:51,237 INFO L93 Difference]: Finished difference Result 133127 states and 147462 transitions. [2020-10-19 18:23:51,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:51,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-19 18:23:51,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:51,238 INFO L225 Difference]: With dead ends: 133127 [2020-10-19 18:23:51,238 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:23:51,239 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 [2020-10-19 18:23:51,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:23:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:23:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:23:51,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:23:51,240 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-19 18:23:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:51,240 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:23:51,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:23:51,241 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:23:51,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-19 18:23:51,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:23:51 BoogieIcfgContainer [2020-10-19 18:23:51,251 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:23:51,252 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:23:51,252 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:23:51,252 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:23:51,253 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:34" (3/4) ... [2020-10-19 18:23:51,276 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:23:51,294 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-19 18:23:51,294 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 18:23:51,295 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 18:23:51,306 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-19 18:23:51,307 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-19 18:23:51,307 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-19 18:23:51,308 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 18:23:51,431 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:23:51,431 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:23:51,434 INFO L168 Benchmark]: Toolchain (without parser) took 17792.56 ms. Allocated memory was 1.0 GB in the beginning and 2.3 GB in the end (delta: 1.3 GB). Free memory was 955.9 MB in the beginning and 1.1 GB in the end (delta: -102.5 MB). Peak memory consumption was 1.2 GB. Max. memory is 11.5 GB. [2020-10-19 18:23:51,435 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:23:51,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.02 ms. Allocated memory is still 1.0 GB. Free memory was 955.9 MB in the beginning and 939.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:51,437 INFO L168 Benchmark]: Boogie Preprocessor took 109.86 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 91.8 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -140.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:51,437 INFO L168 Benchmark]: RCFGBuilder took 417.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:51,438 INFO L168 Benchmark]: TraceAbstraction took 16772.98 ms. Allocated memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: 1.2 GB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -4.7 MB). Peak memory consumption was 1.2 GB. Max. memory is 11.5 GB. [2020-10-19 18:23:51,439 INFO L168 Benchmark]: Witness Printer took 179.50 ms. Allocated memory is still 2.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:23:51,441 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 303.02 ms. Allocated memory is still 1.0 GB. Free memory was 955.9 MB in the beginning and 939.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 109.86 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 91.8 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -140.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 417.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 16772.98 ms. Allocated memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: 1.2 GB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -4.7 MB). Peak memory consumption was 1.2 GB. Max. memory is 11.5 GB. * Witness Printer took 179.50 ms. Allocated memory is still 2.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 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, 56 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.7s, OverallIterations: 34, TraceHistogramMax: 1, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3442 SDtfs, 5053 SDslu, 255 SDs, 0 SdLazy, 2412 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 235 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106506occurred in iteration=33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.6s AutomataMinimizationTime, 34 MinimizatonAttempts, 16387 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 987 NumberOfCodeBlocks, 987 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 953 ConstructedInterpolants, 0 QuantifiedInterpolants, 82577 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 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...