./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 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/locks/test_locks_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 0.1.25-9a8b2e8 [2020-10-20 06:16:22,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:16:22,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:16:22,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:16:22,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:16:22,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:16:22,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:16:22,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:16:22,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:16:22,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:16:22,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:16:22,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:16:22,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:16:22,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:16:22,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:16:22,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:16:22,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:16:22,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:16:22,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:16:22,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:16:22,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:16:22,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:16:22,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:16:22,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:16:22,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:16:22,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:16:22,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:16:22,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:16:22,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:16:22,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:16:22,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:16:22,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:16:22,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:16:22,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:16:22,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:16:22,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:16:22,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:16:22,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:16:22,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:16:22,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:16:22,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:16:22,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 06:16:22,588 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:16:22,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:16:22,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:16:22,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:16:22,590 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:16:22,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:16:22,591 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:16:22,591 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:16:22,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:16:22,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:16:22,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:16:22,592 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:16:22,592 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:16:22,593 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 06:16:22,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:16:22,593 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:16:22,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:16:22,593 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:16:22,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:16:22,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:16:22,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:16:22,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:16:22,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:16:22,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:16:22,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:16:22,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:16:22,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:16:22,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:16:22,596 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 [2020-10-20 06:16:22,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:16:22,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:16:22,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:16:22,825 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:16:22,826 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:16:22,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_12.c [2020-10-20 06:16:22,920 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ea0e50b/0d853036baba494da0ad7936ead8256c/FLAGe593cade7 [2020-10-20 06:16:23,356 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:16:23,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_12.c [2020-10-20 06:16:23,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ea0e50b/0d853036baba494da0ad7936ead8256c/FLAGe593cade7 [2020-10-20 06:16:23,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ea0e50b/0d853036baba494da0ad7936ead8256c [2020-10-20 06:16:23,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:16:23,714 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:16:23,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:16:23,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:16:23,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:16:23,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:16:23" (1/1) ... [2020-10-20 06:16:23,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@613ffd05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:23, skipping insertion in model container [2020-10-20 06:16:23,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:16:23" (1/1) ... [2020-10-20 06:16:23,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:16:23,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:16:24,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:16:24,070 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:16:24,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:16:24,140 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:16:24,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:24 WrapperNode [2020-10-20 06:16:24,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:16:24,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:16:24,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:16:24,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:16:24,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:24" (1/1) ... [2020-10-20 06:16:24,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:24" (1/1) ... [2020-10-20 06:16:24,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:24" (1/1) ... [2020-10-20 06:16:24,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:24" (1/1) ... [2020-10-20 06:16:24,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:24" (1/1) ... [2020-10-20 06:16:24,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:24" (1/1) ... [2020-10-20 06:16:24,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:24" (1/1) ... [2020-10-20 06:16:24,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:16:24,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:16:24,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:16:24,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:16:24,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:16:24,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 06:16:24,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:16:24,253 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-20 06:16:24,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 06:16:24,253 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 06:16:24,254 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-20 06:16:24,254 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-20 06:16:24,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:16:24,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 06:16:24,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 06:16:24,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 06:16:24,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:16:24,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:16:24,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 06:16:24,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 06:16:24,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:16:24,630 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:16:24,631 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-20 06:16:24,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:24 BoogieIcfgContainer [2020-10-20 06:16:24,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:16:24,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:16:24,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:16:24,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:16:24,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:16:23" (1/3) ... [2020-10-20 06:16:24,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c275c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:16:24, skipping insertion in model container [2020-10-20 06:16:24,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:24" (2/3) ... [2020-10-20 06:16:24,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c275c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:16:24, skipping insertion in model container [2020-10-20 06:16:24,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:24" (3/3) ... [2020-10-20 06:16:24,644 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2020-10-20 06:16:24,659 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:16:24,667 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 06:16:24,704 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 06:16:24,753 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:16:24,753 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 06:16:24,753 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:16:24,754 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:16:24,754 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:16:24,754 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:16:24,754 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:16:24,754 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:16:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-20 06:16:24,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 06:16:24,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:24,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:24,787 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1172154548, now seen corresponding path program 1 times [2020-10-20 06:16:24,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:24,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831474820] [2020-10-20 06:16:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:25,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:25,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831474820] [2020-10-20 06:16:25,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:25,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:16:25,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593332285] [2020-10-20 06:16:25,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:16:25,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:25,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:16:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:16:25,110 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-10-20 06:16:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:25,166 INFO L93 Difference]: Finished difference Result 52 states and 87 transitions. [2020-10-20 06:16:25,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:16:25,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-20 06:16:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:25,180 INFO L225 Difference]: With dead ends: 52 [2020-10-20 06:16:25,181 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 06:16:25,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:16:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 06:16:25,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-20 06:16:25,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-20 06:16:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 82 transitions. [2020-10-20 06:16:25,227 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 82 transitions. Word has length 9 [2020-10-20 06:16:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:25,228 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 82 transitions. [2020-10-20 06:16:25,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:16:25,228 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 82 transitions. [2020-10-20 06:16:25,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 06:16:25,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:25,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:25,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:16:25,230 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:25,231 INFO L82 PathProgramCache]: Analyzing trace with hash 120209725, now seen corresponding path program 1 times [2020-10-20 06:16:25,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:25,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966394006] [2020-10-20 06:16:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:25,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:25,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966394006] [2020-10-20 06:16:25,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:25,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:25,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756325128] [2020-10-20 06:16:25,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:25,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:25,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:25,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:25,370 INFO L87 Difference]: Start difference. First operand 47 states and 82 transitions. Second operand 4 states. [2020-10-20 06:16:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:25,624 INFO L93 Difference]: Finished difference Result 85 states and 154 transitions. [2020-10-20 06:16:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:25,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-20 06:16:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:25,628 INFO L225 Difference]: With dead ends: 85 [2020-10-20 06:16:25,629 INFO L226 Difference]: Without dead ends: 85 [2020-10-20 06:16:25,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-20 06:16:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2020-10-20 06:16:25,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-20 06:16:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 107 transitions. [2020-10-20 06:16:25,653 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 107 transitions. Word has length 24 [2020-10-20 06:16:25,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:25,654 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 107 transitions. [2020-10-20 06:16:25,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:25,654 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 107 transitions. [2020-10-20 06:16:25,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 06:16:25,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:25,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:25,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:16:25,656 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:25,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:25,657 INFO L82 PathProgramCache]: Analyzing trace with hash -900858629, now seen corresponding path program 1 times [2020-10-20 06:16:25,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:25,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442741997] [2020-10-20 06:16:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:25,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:25,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442741997] [2020-10-20 06:16:25,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:25,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:25,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43924794] [2020-10-20 06:16:25,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:25,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:25,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:25,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:25,754 INFO L87 Difference]: Start difference. First operand 60 states and 107 transitions. Second operand 4 states. [2020-10-20 06:16:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:25,984 INFO L93 Difference]: Finished difference Result 85 states and 152 transitions. [2020-10-20 06:16:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:25,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-20 06:16:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:25,986 INFO L225 Difference]: With dead ends: 85 [2020-10-20 06:16:25,987 INFO L226 Difference]: Without dead ends: 85 [2020-10-20 06:16:25,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:25,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-20 06:16:26,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-20 06:16:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-20 06:16:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 151 transitions. [2020-10-20 06:16:26,008 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 151 transitions. Word has length 24 [2020-10-20 06:16:26,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:26,008 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 151 transitions. [2020-10-20 06:16:26,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 151 transitions. [2020-10-20 06:16:26,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 06:16:26,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:26,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:26,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 06:16:26,013 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:26,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:26,013 INFO L82 PathProgramCache]: Analyzing trace with hash -561878445, now seen corresponding path program 1 times [2020-10-20 06:16:26,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:26,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143654281] [2020-10-20 06:16:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:26,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:26,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143654281] [2020-10-20 06:16:26,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:26,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:26,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010229902] [2020-10-20 06:16:26,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:26,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:26,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:26,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:26,116 INFO L87 Difference]: Start difference. First operand 84 states and 151 transitions. Second operand 4 states. [2020-10-20 06:16:26,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:26,322 INFO L93 Difference]: Finished difference Result 88 states and 154 transitions. [2020-10-20 06:16:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:26,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-20 06:16:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:26,324 INFO L225 Difference]: With dead ends: 88 [2020-10-20 06:16:26,324 INFO L226 Difference]: Without dead ends: 88 [2020-10-20 06:16:26,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-20 06:16:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-20 06:16:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-20 06:16:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 153 transitions. [2020-10-20 06:16:26,334 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 153 transitions. Word has length 25 [2020-10-20 06:16:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:26,335 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 153 transitions. [2020-10-20 06:16:26,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 153 transitions. [2020-10-20 06:16:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 06:16:26,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:26,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:26,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 06:16:26,337 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:26,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:26,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2144740949, now seen corresponding path program 1 times [2020-10-20 06:16:26,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:26,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424095844] [2020-10-20 06:16:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:26,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:26,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424095844] [2020-10-20 06:16:26,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:26,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:26,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944828289] [2020-10-20 06:16:26,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:26,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:26,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:26,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:26,412 INFO L87 Difference]: Start difference. First operand 87 states and 153 transitions. Second operand 4 states. [2020-10-20 06:16:26,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:26,615 INFO L93 Difference]: Finished difference Result 161 states and 287 transitions. [2020-10-20 06:16:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:26,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-20 06:16:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:26,618 INFO L225 Difference]: With dead ends: 161 [2020-10-20 06:16:26,618 INFO L226 Difference]: Without dead ends: 161 [2020-10-20 06:16:26,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-20 06:16:26,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-20 06:16:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-20 06:16:26,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 286 transitions. [2020-10-20 06:16:26,630 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 286 transitions. Word has length 25 [2020-10-20 06:16:26,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:26,631 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 286 transitions. [2020-10-20 06:16:26,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:26,631 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 286 transitions. [2020-10-20 06:16:26,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 06:16:26,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:26,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:26,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 06:16:26,634 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:26,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:26,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1129157993, now seen corresponding path program 1 times [2020-10-20 06:16:26,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:26,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499621482] [2020-10-20 06:16:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:26,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:26,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499621482] [2020-10-20 06:16:26,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:26,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:26,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383081010] [2020-10-20 06:16:26,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:26,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:26,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:26,719 INFO L87 Difference]: Start difference. First operand 160 states and 286 transitions. Second operand 4 states. [2020-10-20 06:16:26,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:26,905 INFO L93 Difference]: Finished difference Result 205 states and 369 transitions. [2020-10-20 06:16:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:26,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-20 06:16:26,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:26,908 INFO L225 Difference]: With dead ends: 205 [2020-10-20 06:16:26,908 INFO L226 Difference]: Without dead ends: 205 [2020-10-20 06:16:26,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-20 06:16:26,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2020-10-20 06:16:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-20 06:16:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 284 transitions. [2020-10-20 06:16:26,918 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 284 transitions. Word has length 25 [2020-10-20 06:16:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:26,919 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 284 transitions. [2020-10-20 06:16:26,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 284 transitions. [2020-10-20 06:16:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 06:16:26,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:26,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:26,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 06:16:26,922 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:26,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:26,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2069057926, now seen corresponding path program 1 times [2020-10-20 06:16:26,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:26,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276503204] [2020-10-20 06:16:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:26,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:26,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276503204] [2020-10-20 06:16:26,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:26,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:26,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060561363] [2020-10-20 06:16:26,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:26,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:26,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:26,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:26,985 INFO L87 Difference]: Start difference. First operand 160 states and 284 transitions. Second operand 4 states. [2020-10-20 06:16:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:27,155 INFO L93 Difference]: Finished difference Result 297 states and 535 transitions. [2020-10-20 06:16:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:27,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-20 06:16:27,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:27,158 INFO L225 Difference]: With dead ends: 297 [2020-10-20 06:16:27,159 INFO L226 Difference]: Without dead ends: 297 [2020-10-20 06:16:27,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:27,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-20 06:16:27,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 216. [2020-10-20 06:16:27,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-20 06:16:27,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 382 transitions. [2020-10-20 06:16:27,171 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 382 transitions. Word has length 26 [2020-10-20 06:16:27,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:27,171 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 382 transitions. [2020-10-20 06:16:27,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 382 transitions. [2020-10-20 06:16:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 06:16:27,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:27,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:27,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 06:16:27,174 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:27,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:27,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1047989572, now seen corresponding path program 1 times [2020-10-20 06:16:27,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:27,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4635163] [2020-10-20 06:16:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:27,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:27,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4635163] [2020-10-20 06:16:27,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:27,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:27,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372457921] [2020-10-20 06:16:27,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:27,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:27,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:27,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:27,245 INFO L87 Difference]: Start difference. First operand 216 states and 382 transitions. Second operand 4 states. [2020-10-20 06:16:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:27,427 INFO L93 Difference]: Finished difference Result 305 states and 537 transitions. [2020-10-20 06:16:27,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:27,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-20 06:16:27,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:27,429 INFO L225 Difference]: With dead ends: 305 [2020-10-20 06:16:27,430 INFO L226 Difference]: Without dead ends: 305 [2020-10-20 06:16:27,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-20 06:16:27,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2020-10-20 06:16:27,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-20 06:16:27,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 536 transitions. [2020-10-20 06:16:27,441 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 536 transitions. Word has length 26 [2020-10-20 06:16:27,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:27,441 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 536 transitions. [2020-10-20 06:16:27,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:27,441 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 536 transitions. [2020-10-20 06:16:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 06:16:27,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:27,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:27,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 06:16:27,444 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:27,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:27,444 INFO L82 PathProgramCache]: Analyzing trace with hash -277105216, now seen corresponding path program 1 times [2020-10-20 06:16:27,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:27,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706436066] [2020-10-20 06:16:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:27,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:27,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706436066] [2020-10-20 06:16:27,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:27,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:27,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266471054] [2020-10-20 06:16:27,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:27,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:27,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:27,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:27,511 INFO L87 Difference]: Start difference. First operand 304 states and 536 transitions. Second operand 4 states. [2020-10-20 06:16:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:27,682 INFO L93 Difference]: Finished difference Result 311 states and 541 transitions. [2020-10-20 06:16:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:27,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-20 06:16:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:27,685 INFO L225 Difference]: With dead ends: 311 [2020-10-20 06:16:27,685 INFO L226 Difference]: Without dead ends: 311 [2020-10-20 06:16:27,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-20 06:16:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2020-10-20 06:16:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-20 06:16:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 540 transitions. [2020-10-20 06:16:27,704 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 540 transitions. Word has length 27 [2020-10-20 06:16:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:27,704 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 540 transitions. [2020-10-20 06:16:27,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 540 transitions. [2020-10-20 06:16:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 06:16:27,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:27,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:27,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 06:16:27,707 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:27,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:27,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1865453118, now seen corresponding path program 1 times [2020-10-20 06:16:27,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:27,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033708682] [2020-10-20 06:16:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:27,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:27,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033708682] [2020-10-20 06:16:27,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:27,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:27,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577702032] [2020-10-20 06:16:27,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:27,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:27,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:27,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:27,772 INFO L87 Difference]: Start difference. First operand 310 states and 540 transitions. Second operand 4 states. [2020-10-20 06:16:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:27,944 INFO L93 Difference]: Finished difference Result 571 states and 1005 transitions. [2020-10-20 06:16:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:27,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-20 06:16:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:27,948 INFO L225 Difference]: With dead ends: 571 [2020-10-20 06:16:27,948 INFO L226 Difference]: Without dead ends: 571 [2020-10-20 06:16:27,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-10-20 06:16:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 426. [2020-10-20 06:16:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-20 06:16:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 732 transitions. [2020-10-20 06:16:27,963 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 732 transitions. Word has length 27 [2020-10-20 06:16:27,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:27,964 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 732 transitions. [2020-10-20 06:16:27,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 732 transitions. [2020-10-20 06:16:27,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 06:16:27,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:27,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:27,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 06:16:27,967 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:27,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1408445824, now seen corresponding path program 1 times [2020-10-20 06:16:27,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:27,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301187990] [2020-10-20 06:16:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:28,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:28,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301187990] [2020-10-20 06:16:28,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:28,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:28,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703462254] [2020-10-20 06:16:28,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:28,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:28,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:28,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:28,030 INFO L87 Difference]: Start difference. First operand 426 states and 732 transitions. Second operand 4 states. [2020-10-20 06:16:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:28,229 INFO L93 Difference]: Finished difference Result 595 states and 1017 transitions. [2020-10-20 06:16:28,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:28,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-20 06:16:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:28,235 INFO L225 Difference]: With dead ends: 595 [2020-10-20 06:16:28,235 INFO L226 Difference]: Without dead ends: 595 [2020-10-20 06:16:28,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:28,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-20 06:16:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 594. [2020-10-20 06:16:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 594 states. [2020-10-20 06:16:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1016 transitions. [2020-10-20 06:16:28,255 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1016 transitions. Word has length 27 [2020-10-20 06:16:28,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:28,256 INFO L481 AbstractCegarLoop]: Abstraction has 594 states and 1016 transitions. [2020-10-20 06:16:28,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1016 transitions. [2020-10-20 06:16:28,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 06:16:28,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:28,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:28,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-20 06:16:28,259 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:28,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:28,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1987852721, now seen corresponding path program 1 times [2020-10-20 06:16:28,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:28,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144447075] [2020-10-20 06:16:28,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:28,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:28,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144447075] [2020-10-20 06:16:28,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:28,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:28,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071681284] [2020-10-20 06:16:28,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:28,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:28,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:28,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:28,332 INFO L87 Difference]: Start difference. First operand 594 states and 1016 transitions. Second operand 4 states. [2020-10-20 06:16:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:28,524 INFO L93 Difference]: Finished difference Result 603 states and 1017 transitions. [2020-10-20 06:16:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:28,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-20 06:16:28,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:28,528 INFO L225 Difference]: With dead ends: 603 [2020-10-20 06:16:28,529 INFO L226 Difference]: Without dead ends: 603 [2020-10-20 06:16:28,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:28,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-20 06:16:28,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 602. [2020-10-20 06:16:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-10-20 06:16:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1016 transitions. [2020-10-20 06:16:28,543 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1016 transitions. Word has length 28 [2020-10-20 06:16:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:28,543 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 1016 transitions. [2020-10-20 06:16:28,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1016 transitions. [2020-10-20 06:16:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 06:16:28,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:28,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:28,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-20 06:16:28,546 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:28,546 INFO L82 PathProgramCache]: Analyzing trace with hash 718766673, now seen corresponding path program 1 times [2020-10-20 06:16:28,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:28,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528894705] [2020-10-20 06:16:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:28,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:28,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528894705] [2020-10-20 06:16:28,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:28,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:28,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939956187] [2020-10-20 06:16:28,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:28,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:28,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:28,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:28,605 INFO L87 Difference]: Start difference. First operand 602 states and 1016 transitions. Second operand 4 states. [2020-10-20 06:16:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:28,792 INFO L93 Difference]: Finished difference Result 1099 states and 1873 transitions. [2020-10-20 06:16:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:28,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-20 06:16:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:28,798 INFO L225 Difference]: With dead ends: 1099 [2020-10-20 06:16:28,798 INFO L226 Difference]: Without dead ends: 1099 [2020-10-20 06:16:28,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2020-10-20 06:16:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 842. [2020-10-20 06:16:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-10-20 06:16:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1392 transitions. [2020-10-20 06:16:28,829 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1392 transitions. Word has length 28 [2020-10-20 06:16:28,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:28,830 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1392 transitions. [2020-10-20 06:16:28,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1392 transitions. [2020-10-20 06:16:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 06:16:28,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:28,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:28,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-20 06:16:28,834 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:28,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:28,834 INFO L82 PathProgramCache]: Analyzing trace with hash -302301681, now seen corresponding path program 1 times [2020-10-20 06:16:28,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:28,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125653973] [2020-10-20 06:16:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:28,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:28,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125653973] [2020-10-20 06:16:28,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:28,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:28,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912664429] [2020-10-20 06:16:28,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:28,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:28,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:28,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:28,901 INFO L87 Difference]: Start difference. First operand 842 states and 1392 transitions. Second operand 4 states. [2020-10-20 06:16:29,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:29,147 INFO L93 Difference]: Finished difference Result 1163 states and 1913 transitions. [2020-10-20 06:16:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:29,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-20 06:16:29,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:29,155 INFO L225 Difference]: With dead ends: 1163 [2020-10-20 06:16:29,155 INFO L226 Difference]: Without dead ends: 1163 [2020-10-20 06:16:29,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:29,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2020-10-20 06:16:29,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1162. [2020-10-20 06:16:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-10-20 06:16:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1912 transitions. [2020-10-20 06:16:29,190 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1912 transitions. Word has length 28 [2020-10-20 06:16:29,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:29,191 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1912 transitions. [2020-10-20 06:16:29,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:29,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1912 transitions. [2020-10-20 06:16:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 06:16:29,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:29,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:29,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-20 06:16:29,196 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:29,196 INFO L82 PathProgramCache]: Analyzing trace with hash 813560043, now seen corresponding path program 1 times [2020-10-20 06:16:29,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:29,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967391783] [2020-10-20 06:16:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:29,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:29,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967391783] [2020-10-20 06:16:29,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:29,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:29,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433823263] [2020-10-20 06:16:29,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:29,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:29,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:29,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:29,253 INFO L87 Difference]: Start difference. First operand 1162 states and 1912 transitions. Second operand 4 states. [2020-10-20 06:16:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:29,428 INFO L93 Difference]: Finished difference Result 1179 states and 1913 transitions. [2020-10-20 06:16:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:29,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-20 06:16:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:29,434 INFO L225 Difference]: With dead ends: 1179 [2020-10-20 06:16:29,434 INFO L226 Difference]: Without dead ends: 1179 [2020-10-20 06:16:29,435 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 [2020-10-20 06:16:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2020-10-20 06:16:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1178. [2020-10-20 06:16:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1178 states. [2020-10-20 06:16:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1912 transitions. [2020-10-20 06:16:29,461 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1912 transitions. Word has length 29 [2020-10-20 06:16:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:29,461 INFO L481 AbstractCegarLoop]: Abstraction has 1178 states and 1912 transitions. [2020-10-20 06:16:29,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:29,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1912 transitions. [2020-10-20 06:16:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 06:16:29,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:29,463 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] [2020-10-20 06:16:29,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-20 06:16:29,464 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:29,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:29,464 INFO L82 PathProgramCache]: Analyzing trace with hash -774787859, now seen corresponding path program 1 times [2020-10-20 06:16:29,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:29,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646904823] [2020-10-20 06:16:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:29,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:29,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646904823] [2020-10-20 06:16:29,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:29,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:29,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535043392] [2020-10-20 06:16:29,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:29,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:29,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:29,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:29,515 INFO L87 Difference]: Start difference. First operand 1178 states and 1912 transitions. Second operand 4 states. [2020-10-20 06:16:29,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:29,692 INFO L93 Difference]: Finished difference Result 2123 states and 3481 transitions. [2020-10-20 06:16:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:29,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-20 06:16:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:29,703 INFO L225 Difference]: With dead ends: 2123 [2020-10-20 06:16:29,703 INFO L226 Difference]: Without dead ends: 2123 [2020-10-20 06:16:29,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2020-10-20 06:16:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1674. [2020-10-20 06:16:29,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2020-10-20 06:16:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2648 transitions. [2020-10-20 06:16:29,745 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2648 transitions. Word has length 29 [2020-10-20 06:16:29,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:29,746 INFO L481 AbstractCegarLoop]: Abstraction has 1674 states and 2648 transitions. [2020-10-20 06:16:29,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2648 transitions. [2020-10-20 06:16:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 06:16:29,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:29,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:29,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-20 06:16:29,750 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:29,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1795856213, now seen corresponding path program 1 times [2020-10-20 06:16:29,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:29,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888517832] [2020-10-20 06:16:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:29,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:29,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888517832] [2020-10-20 06:16:29,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:29,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:29,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52604774] [2020-10-20 06:16:29,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:29,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:29,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:29,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:29,800 INFO L87 Difference]: Start difference. First operand 1674 states and 2648 transitions. Second operand 4 states. [2020-10-20 06:16:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:29,971 INFO L93 Difference]: Finished difference Result 2283 states and 3593 transitions. [2020-10-20 06:16:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:29,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-20 06:16:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:29,982 INFO L225 Difference]: With dead ends: 2283 [2020-10-20 06:16:29,983 INFO L226 Difference]: Without dead ends: 2283 [2020-10-20 06:16:29,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2020-10-20 06:16:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2282. [2020-10-20 06:16:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2020-10-20 06:16:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3592 transitions. [2020-10-20 06:16:30,031 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3592 transitions. Word has length 29 [2020-10-20 06:16:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:30,032 INFO L481 AbstractCegarLoop]: Abstraction has 2282 states and 3592 transitions. [2020-10-20 06:16:30,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:30,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3592 transitions. [2020-10-20 06:16:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 06:16:30,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:30,036 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] [2020-10-20 06:16:30,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-20 06:16:30,036 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:30,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:30,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1758020378, now seen corresponding path program 1 times [2020-10-20 06:16:30,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:30,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095415996] [2020-10-20 06:16:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:30,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:30,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095415996] [2020-10-20 06:16:30,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:30,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:30,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139054080] [2020-10-20 06:16:30,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:30,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:30,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:30,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:30,083 INFO L87 Difference]: Start difference. First operand 2282 states and 3592 transitions. Second operand 4 states. [2020-10-20 06:16:30,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:30,242 INFO L93 Difference]: Finished difference Result 2315 states and 3593 transitions. [2020-10-20 06:16:30,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:30,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-20 06:16:30,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:30,253 INFO L225 Difference]: With dead ends: 2315 [2020-10-20 06:16:30,253 INFO L226 Difference]: Without dead ends: 2315 [2020-10-20 06:16:30,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2020-10-20 06:16:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2314. [2020-10-20 06:16:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-10-20 06:16:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3592 transitions. [2020-10-20 06:16:30,302 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3592 transitions. Word has length 30 [2020-10-20 06:16:30,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:30,303 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 3592 transitions. [2020-10-20 06:16:30,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:30,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3592 transitions. [2020-10-20 06:16:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 06:16:30,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:30,306 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] [2020-10-20 06:16:30,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-20 06:16:30,306 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:30,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:30,306 INFO L82 PathProgramCache]: Analyzing trace with hash 169672476, now seen corresponding path program 1 times [2020-10-20 06:16:30,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:30,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689001441] [2020-10-20 06:16:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:30,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:30,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689001441] [2020-10-20 06:16:30,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:30,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:30,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624900296] [2020-10-20 06:16:30,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:30,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:30,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:30,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:30,351 INFO L87 Difference]: Start difference. First operand 2314 states and 3592 transitions. Second operand 4 states. [2020-10-20 06:16:30,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:30,529 INFO L93 Difference]: Finished difference Result 4107 states and 6441 transitions. [2020-10-20 06:16:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:30,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-20 06:16:30,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:30,549 INFO L225 Difference]: With dead ends: 4107 [2020-10-20 06:16:30,549 INFO L226 Difference]: Without dead ends: 4107 [2020-10-20 06:16:30,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:30,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2020-10-20 06:16:30,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3338. [2020-10-20 06:16:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3338 states. [2020-10-20 06:16:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 5032 transitions. [2020-10-20 06:16:30,622 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 5032 transitions. Word has length 30 [2020-10-20 06:16:30,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:30,623 INFO L481 AbstractCegarLoop]: Abstraction has 3338 states and 5032 transitions. [2020-10-20 06:16:30,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:30,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 5032 transitions. [2020-10-20 06:16:30,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 06:16:30,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:30,628 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] [2020-10-20 06:16:30,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-20 06:16:30,628 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:30,628 INFO L82 PathProgramCache]: Analyzing trace with hash -851395878, now seen corresponding path program 1 times [2020-10-20 06:16:30,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:30,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491150974] [2020-10-20 06:16:30,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:30,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:30,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491150974] [2020-10-20 06:16:30,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:30,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:30,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712241512] [2020-10-20 06:16:30,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:30,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:30,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:30,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:30,711 INFO L87 Difference]: Start difference. First operand 3338 states and 5032 transitions. Second operand 4 states. [2020-10-20 06:16:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:30,875 INFO L93 Difference]: Finished difference Result 4491 states and 6729 transitions. [2020-10-20 06:16:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:30,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-20 06:16:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:30,897 INFO L225 Difference]: With dead ends: 4491 [2020-10-20 06:16:30,897 INFO L226 Difference]: Without dead ends: 4491 [2020-10-20 06:16:30,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:30,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2020-10-20 06:16:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 4490. [2020-10-20 06:16:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4490 states. [2020-10-20 06:16:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 6728 transitions. [2020-10-20 06:16:31,161 INFO L78 Accepts]: Start accepts. Automaton has 4490 states and 6728 transitions. Word has length 30 [2020-10-20 06:16:31,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:31,161 INFO L481 AbstractCegarLoop]: Abstraction has 4490 states and 6728 transitions. [2020-10-20 06:16:31,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:31,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4490 states and 6728 transitions. [2020-10-20 06:16:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-20 06:16:31,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:31,167 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] [2020-10-20 06:16:31,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-20 06:16:31,168 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:31,168 INFO L82 PathProgramCache]: Analyzing trace with hash 971530262, now seen corresponding path program 1 times [2020-10-20 06:16:31,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:31,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158797770] [2020-10-20 06:16:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:31,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:31,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158797770] [2020-10-20 06:16:31,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:31,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:31,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314141961] [2020-10-20 06:16:31,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:31,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:31,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:31,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:31,232 INFO L87 Difference]: Start difference. First operand 4490 states and 6728 transitions. Second operand 4 states. [2020-10-20 06:16:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:31,410 INFO L93 Difference]: Finished difference Result 4555 states and 6729 transitions. [2020-10-20 06:16:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:31,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-20 06:16:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:31,445 INFO L225 Difference]: With dead ends: 4555 [2020-10-20 06:16:31,445 INFO L226 Difference]: Without dead ends: 4555 [2020-10-20 06:16:31,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:31,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2020-10-20 06:16:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 4554. [2020-10-20 06:16:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4554 states. [2020-10-20 06:16:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 6728 transitions. [2020-10-20 06:16:31,523 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 6728 transitions. Word has length 31 [2020-10-20 06:16:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:31,523 INFO L481 AbstractCegarLoop]: Abstraction has 4554 states and 6728 transitions. [2020-10-20 06:16:31,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 6728 transitions. [2020-10-20 06:16:31,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-20 06:16:31,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:31,528 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] [2020-10-20 06:16:31,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-20 06:16:31,529 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash -616817640, now seen corresponding path program 1 times [2020-10-20 06:16:31,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:31,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30318006] [2020-10-20 06:16:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:31,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:31,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30318006] [2020-10-20 06:16:31,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:31,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:31,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599492805] [2020-10-20 06:16:31,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:31,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:31,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:31,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:31,578 INFO L87 Difference]: Start difference. First operand 4554 states and 6728 transitions. Second operand 4 states. [2020-10-20 06:16:31,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:31,774 INFO L93 Difference]: Finished difference Result 7947 states and 11849 transitions. [2020-10-20 06:16:31,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:31,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-20 06:16:31,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:31,798 INFO L225 Difference]: With dead ends: 7947 [2020-10-20 06:16:31,798 INFO L226 Difference]: Without dead ends: 7947 [2020-10-20 06:16:31,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2020-10-20 06:16:32,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 6666. [2020-10-20 06:16:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6666 states. [2020-10-20 06:16:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 9544 transitions. [2020-10-20 06:16:32,072 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 9544 transitions. Word has length 31 [2020-10-20 06:16:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:32,072 INFO L481 AbstractCegarLoop]: Abstraction has 6666 states and 9544 transitions. [2020-10-20 06:16:32,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 9544 transitions. [2020-10-20 06:16:32,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-20 06:16:32,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:32,081 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] [2020-10-20 06:16:32,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-20 06:16:32,081 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:32,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1637885994, now seen corresponding path program 1 times [2020-10-20 06:16:32,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:32,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076186696] [2020-10-20 06:16:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:32,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:32,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076186696] [2020-10-20 06:16:32,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:32,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:32,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473132455] [2020-10-20 06:16:32,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:32,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:32,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:32,143 INFO L87 Difference]: Start difference. First operand 6666 states and 9544 transitions. Second operand 4 states. [2020-10-20 06:16:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:32,299 INFO L93 Difference]: Finished difference Result 8843 states and 12553 transitions. [2020-10-20 06:16:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:32,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-20 06:16:32,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:32,316 INFO L225 Difference]: With dead ends: 8843 [2020-10-20 06:16:32,317 INFO L226 Difference]: Without dead ends: 8843 [2020-10-20 06:16:32,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2020-10-20 06:16:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8842. [2020-10-20 06:16:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8842 states. [2020-10-20 06:16:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8842 states to 8842 states and 12552 transitions. [2020-10-20 06:16:32,479 INFO L78 Accepts]: Start accepts. Automaton has 8842 states and 12552 transitions. Word has length 31 [2020-10-20 06:16:32,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:32,480 INFO L481 AbstractCegarLoop]: Abstraction has 8842 states and 12552 transitions. [2020-10-20 06:16:32,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 8842 states and 12552 transitions. [2020-10-20 06:16:32,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-20 06:16:32,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:32,531 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] [2020-10-20 06:16:32,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-20 06:16:32,532 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:32,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1934816283, now seen corresponding path program 1 times [2020-10-20 06:16:32,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:32,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375016790] [2020-10-20 06:16:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:32,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:32,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375016790] [2020-10-20 06:16:32,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:32,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:32,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910703709] [2020-10-20 06:16:32,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:32,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:32,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:32,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:32,596 INFO L87 Difference]: Start difference. First operand 8842 states and 12552 transitions. Second operand 4 states. [2020-10-20 06:16:32,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:32,767 INFO L93 Difference]: Finished difference Result 8971 states and 12553 transitions. [2020-10-20 06:16:32,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:32,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-20 06:16:32,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:32,787 INFO L225 Difference]: With dead ends: 8971 [2020-10-20 06:16:32,787 INFO L226 Difference]: Without dead ends: 8971 [2020-10-20 06:16:32,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:32,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2020-10-20 06:16:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 8970. [2020-10-20 06:16:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8970 states. [2020-10-20 06:16:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8970 states to 8970 states and 12552 transitions. [2020-10-20 06:16:32,949 INFO L78 Accepts]: Start accepts. Automaton has 8970 states and 12552 transitions. Word has length 32 [2020-10-20 06:16:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:32,949 INFO L481 AbstractCegarLoop]: Abstraction has 8970 states and 12552 transitions. [2020-10-20 06:16:32,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 8970 states and 12552 transitions. [2020-10-20 06:16:32,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-20 06:16:32,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:32,959 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] [2020-10-20 06:16:32,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-20 06:16:32,960 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:32,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:32,960 INFO L82 PathProgramCache]: Analyzing trace with hash 771803111, now seen corresponding path program 1 times [2020-10-20 06:16:32,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:32,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863688355] [2020-10-20 06:16:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:32,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:33,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863688355] [2020-10-20 06:16:33,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:33,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:33,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030557921] [2020-10-20 06:16:33,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:33,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:33,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:33,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:33,006 INFO L87 Difference]: Start difference. First operand 8970 states and 12552 transitions. Second operand 4 states. [2020-10-20 06:16:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:33,220 INFO L93 Difference]: Finished difference Result 15371 states and 21641 transitions. [2020-10-20 06:16:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:33,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-20 06:16:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:33,252 INFO L225 Difference]: With dead ends: 15371 [2020-10-20 06:16:33,252 INFO L226 Difference]: Without dead ends: 15371 [2020-10-20 06:16:33,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2020-10-20 06:16:33,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 13322. [2020-10-20 06:16:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13322 states. [2020-10-20 06:16:33,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13322 states to 13322 states and 18056 transitions. [2020-10-20 06:16:33,556 INFO L78 Accepts]: Start accepts. Automaton has 13322 states and 18056 transitions. Word has length 32 [2020-10-20 06:16:33,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:33,557 INFO L481 AbstractCegarLoop]: Abstraction has 13322 states and 18056 transitions. [2020-10-20 06:16:33,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:33,557 INFO L276 IsEmpty]: Start isEmpty. Operand 13322 states and 18056 transitions. [2020-10-20 06:16:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-20 06:16:33,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:33,578 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] [2020-10-20 06:16:33,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-20 06:16:33,579 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:33,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:33,580 INFO L82 PathProgramCache]: Analyzing trace with hash -249265243, now seen corresponding path program 1 times [2020-10-20 06:16:33,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:33,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158197672] [2020-10-20 06:16:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:33,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:33,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158197672] [2020-10-20 06:16:33,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:33,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:33,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707849589] [2020-10-20 06:16:33,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:33,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:33,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:33,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:33,970 INFO L87 Difference]: Start difference. First operand 13322 states and 18056 transitions. Second operand 4 states. [2020-10-20 06:16:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:34,155 INFO L93 Difference]: Finished difference Result 17419 states and 23305 transitions. [2020-10-20 06:16:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:34,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-20 06:16:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:34,179 INFO L225 Difference]: With dead ends: 17419 [2020-10-20 06:16:34,180 INFO L226 Difference]: Without dead ends: 17419 [2020-10-20 06:16:34,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17419 states. [2020-10-20 06:16:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17419 to 17418. [2020-10-20 06:16:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17418 states. [2020-10-20 06:16:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17418 states to 17418 states and 23304 transitions. [2020-10-20 06:16:34,520 INFO L78 Accepts]: Start accepts. Automaton has 17418 states and 23304 transitions. Word has length 32 [2020-10-20 06:16:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:34,520 INFO L481 AbstractCegarLoop]: Abstraction has 17418 states and 23304 transitions. [2020-10-20 06:16:34,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 17418 states and 23304 transitions. [2020-10-20 06:16:34,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-20 06:16:34,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:34,540 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] [2020-10-20 06:16:34,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-20 06:16:34,541 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:34,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1837235391, now seen corresponding path program 1 times [2020-10-20 06:16:34,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:34,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750358980] [2020-10-20 06:16:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:34,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:34,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750358980] [2020-10-20 06:16:34,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:34,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:34,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824246777] [2020-10-20 06:16:34,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:34,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:34,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:34,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:34,591 INFO L87 Difference]: Start difference. First operand 17418 states and 23304 transitions. Second operand 4 states. [2020-10-20 06:16:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:34,775 INFO L93 Difference]: Finished difference Result 17675 states and 23305 transitions. [2020-10-20 06:16:34,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:34,776 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-20 06:16:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:34,877 INFO L225 Difference]: With dead ends: 17675 [2020-10-20 06:16:34,877 INFO L226 Difference]: Without dead ends: 17675 [2020-10-20 06:16:34,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17675 states. [2020-10-20 06:16:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17675 to 17674. [2020-10-20 06:16:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17674 states. [2020-10-20 06:16:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17674 states to 17674 states and 23304 transitions. [2020-10-20 06:16:35,431 INFO L78 Accepts]: Start accepts. Automaton has 17674 states and 23304 transitions. Word has length 33 [2020-10-20 06:16:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:35,432 INFO L481 AbstractCegarLoop]: Abstraction has 17674 states and 23304 transitions. [2020-10-20 06:16:35,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 17674 states and 23304 transitions. [2020-10-20 06:16:35,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-20 06:16:35,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:35,460 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] [2020-10-20 06:16:35,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-20 06:16:35,461 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:35,461 INFO L82 PathProgramCache]: Analyzing trace with hash 869384003, now seen corresponding path program 1 times [2020-10-20 06:16:35,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:35,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006110619] [2020-10-20 06:16:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:35,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006110619] [2020-10-20 06:16:35,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:35,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:35,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972819422] [2020-10-20 06:16:35,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:35,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:35,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:35,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:35,544 INFO L87 Difference]: Start difference. First operand 17674 states and 23304 transitions. Second operand 4 states. [2020-10-20 06:16:35,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:35,854 INFO L93 Difference]: Finished difference Result 34315 states and 43529 transitions. [2020-10-20 06:16:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:35,854 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-20 06:16:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:35,895 INFO L225 Difference]: With dead ends: 34315 [2020-10-20 06:16:35,895 INFO L226 Difference]: Without dead ends: 34315 [2020-10-20 06:16:35,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34315 states. [2020-10-20 06:16:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34315 to 34314. [2020-10-20 06:16:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34314 states. [2020-10-20 06:16:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34314 states to 34314 states and 43528 transitions. [2020-10-20 06:16:36,723 INFO L78 Accepts]: Start accepts. Automaton has 34314 states and 43528 transitions. Word has length 33 [2020-10-20 06:16:36,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:36,723 INFO L481 AbstractCegarLoop]: Abstraction has 34314 states and 43528 transitions. [2020-10-20 06:16:36,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 34314 states and 43528 transitions. [2020-10-20 06:16:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-20 06:16:36,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:36,743 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] [2020-10-20 06:16:36,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-20 06:16:36,744 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:36,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1890452357, now seen corresponding path program 1 times [2020-10-20 06:16:36,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:36,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967733176] [2020-10-20 06:16:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:36,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967733176] [2020-10-20 06:16:36,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:36,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:36,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819432484] [2020-10-20 06:16:36,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:36,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:36,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:36,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:36,807 INFO L87 Difference]: Start difference. First operand 34314 states and 43528 transitions. Second operand 4 states. [2020-10-20 06:16:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:37,585 INFO L93 Difference]: Finished difference Result 37387 states and 48137 transitions. [2020-10-20 06:16:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:37,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-20 06:16:37,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:37,612 INFO L225 Difference]: With dead ends: 37387 [2020-10-20 06:16:37,612 INFO L226 Difference]: Without dead ends: 37387 [2020-10-20 06:16:37,613 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 [2020-10-20 06:16:37,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37387 states. [2020-10-20 06:16:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37387 to 34314. [2020-10-20 06:16:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34314 states. [2020-10-20 06:16:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34314 states to 34314 states and 43016 transitions. [2020-10-20 06:16:37,955 INFO L78 Accepts]: Start accepts. Automaton has 34314 states and 43016 transitions. Word has length 33 [2020-10-20 06:16:37,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:37,955 INFO L481 AbstractCegarLoop]: Abstraction has 34314 states and 43016 transitions. [2020-10-20 06:16:37,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:37,955 INFO L276 IsEmpty]: Start isEmpty. Operand 34314 states and 43016 transitions. [2020-10-20 06:16:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-20 06:16:38,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:38,056 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] [2020-10-20 06:16:38,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-20 06:16:38,057 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:38,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1187782832, now seen corresponding path program 1 times [2020-10-20 06:16:38,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:38,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361804573] [2020-10-20 06:16:38,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:38,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:38,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361804573] [2020-10-20 06:16:38,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:38,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:38,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587681892] [2020-10-20 06:16:38,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:38,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:38,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:38,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:38,119 INFO L87 Difference]: Start difference. First operand 34314 states and 43016 transitions. Second operand 4 states. [2020-10-20 06:16:38,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:38,357 INFO L93 Difference]: Finished difference Result 56843 states and 70665 transitions. [2020-10-20 06:16:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:38,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-20 06:16:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:38,399 INFO L225 Difference]: With dead ends: 56843 [2020-10-20 06:16:38,400 INFO L226 Difference]: Without dead ends: 56843 [2020-10-20 06:16:38,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56843 states. [2020-10-20 06:16:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56843 to 52746. [2020-10-20 06:16:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52746 states. [2020-10-20 06:16:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52746 states to 52746 states and 64520 transitions. [2020-10-20 06:16:39,608 INFO L78 Accepts]: Start accepts. Automaton has 52746 states and 64520 transitions. Word has length 34 [2020-10-20 06:16:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:39,608 INFO L481 AbstractCegarLoop]: Abstraction has 52746 states and 64520 transitions. [2020-10-20 06:16:39,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 52746 states and 64520 transitions. [2020-10-20 06:16:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-20 06:16:39,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:39,637 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] [2020-10-20 06:16:39,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-20 06:16:39,637 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash 166714478, now seen corresponding path program 1 times [2020-10-20 06:16:39,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:39,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133747801] [2020-10-20 06:16:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:39,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:39,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133747801] [2020-10-20 06:16:39,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:39,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:39,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12191199] [2020-10-20 06:16:39,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:39,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:39,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:39,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:39,681 INFO L87 Difference]: Start difference. First operand 52746 states and 64520 transitions. Second operand 4 states. [2020-10-20 06:16:40,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:40,118 INFO L93 Difference]: Finished difference Result 67083 states and 79881 transitions. [2020-10-20 06:16:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:40,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-20 06:16:40,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:40,171 INFO L225 Difference]: With dead ends: 67083 [2020-10-20 06:16:40,171 INFO L226 Difference]: Without dead ends: 67083 [2020-10-20 06:16:40,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67083 states. [2020-10-20 06:16:41,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67083 to 67082. [2020-10-20 06:16:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67082 states. [2020-10-20 06:16:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67082 states to 67082 states and 79880 transitions. [2020-10-20 06:16:41,637 INFO L78 Accepts]: Start accepts. Automaton has 67082 states and 79880 transitions. Word has length 34 [2020-10-20 06:16:41,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:41,637 INFO L481 AbstractCegarLoop]: Abstraction has 67082 states and 79880 transitions. [2020-10-20 06:16:41,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 67082 states and 79880 transitions. [2020-10-20 06:16:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-20 06:16:41,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:41,674 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] [2020-10-20 06:16:41,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-20 06:16:41,675 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:41,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:41,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1826744786, now seen corresponding path program 1 times [2020-10-20 06:16:41,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:41,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937794130] [2020-10-20 06:16:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:41,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:41,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937794130] [2020-10-20 06:16:41,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:41,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:41,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982147181] [2020-10-20 06:16:41,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:41,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:41,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:41,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:41,733 INFO L87 Difference]: Start difference. First operand 67082 states and 79880 transitions. Second operand 4 states. [2020-10-20 06:16:42,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:42,203 INFO L93 Difference]: Finished difference Result 68619 states and 80905 transitions. [2020-10-20 06:16:42,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:42,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-20 06:16:42,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:42,255 INFO L225 Difference]: With dead ends: 68619 [2020-10-20 06:16:42,255 INFO L226 Difference]: Without dead ends: 68619 [2020-10-20 06:16:42,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2020-10-20 06:16:43,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 68618. [2020-10-20 06:16:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68618 states. [2020-10-20 06:16:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68618 states to 68618 states and 80904 transitions. [2020-10-20 06:16:43,969 INFO L78 Accepts]: Start accepts. Automaton has 68618 states and 80904 transitions. Word has length 35 [2020-10-20 06:16:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:43,969 INFO L481 AbstractCegarLoop]: Abstraction has 68618 states and 80904 transitions. [2020-10-20 06:16:43,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 68618 states and 80904 transitions. [2020-10-20 06:16:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-20 06:16:43,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:43,995 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] [2020-10-20 06:16:43,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-20 06:16:43,996 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:43,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:43,996 INFO L82 PathProgramCache]: Analyzing trace with hash 879874608, now seen corresponding path program 1 times [2020-10-20 06:16:43,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:43,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079928122] [2020-10-20 06:16:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:44,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079928122] [2020-10-20 06:16:44,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:44,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:44,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285237860] [2020-10-20 06:16:44,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:44,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:44,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:44,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:44,054 INFO L87 Difference]: Start difference. First operand 68618 states and 80904 transitions. Second operand 4 states. [2020-10-20 06:16:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:44,973 INFO L93 Difference]: Finished difference Result 110602 states and 126984 transitions. [2020-10-20 06:16:44,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:44,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-20 06:16:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:45,128 INFO L225 Difference]: With dead ends: 110602 [2020-10-20 06:16:45,129 INFO L226 Difference]: Without dead ends: 110602 [2020-10-20 06:16:45,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110602 states. [2020-10-20 06:16:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110602 to 106506. [2020-10-20 06:16:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106506 states. [2020-10-20 06:16:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106506 states to 106506 states and 122888 transitions. [2020-10-20 06:16:48,087 INFO L78 Accepts]: Start accepts. Automaton has 106506 states and 122888 transitions. Word has length 35 [2020-10-20 06:16:48,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:48,087 INFO L481 AbstractCegarLoop]: Abstraction has 106506 states and 122888 transitions. [2020-10-20 06:16:48,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 106506 states and 122888 transitions. [2020-10-20 06:16:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-20 06:16:49,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:49,559 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] [2020-10-20 06:16:49,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-20 06:16:49,560 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:49,560 INFO L82 PathProgramCache]: Analyzing trace with hash -141193746, now seen corresponding path program 1 times [2020-10-20 06:16:49,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:49,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250701348] [2020-10-20 06:16:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:49,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:49,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250701348] [2020-10-20 06:16:49,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:49,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:49,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874077568] [2020-10-20 06:16:49,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:49,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:49,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:49,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:49,624 INFO L87 Difference]: Start difference. First operand 106506 states and 122888 transitions. Second operand 4 states. [2020-10-20 06:16:50,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:50,495 INFO L93 Difference]: Finished difference Result 133127 states and 147462 transitions. [2020-10-20 06:16:50,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:50,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-20 06:16:50,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:50,496 INFO L225 Difference]: With dead ends: 133127 [2020-10-20 06:16:50,496 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 06:16:50,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 06:16:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 06:16:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 06:16:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 06:16:50,498 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-20 06:16:50,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:50,499 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:16:50,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:16:50,499 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 06:16:50,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-20 06:16:50,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:16:50 BoogieIcfgContainer [2020-10-20 06:16:50,510 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:16:50,510 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:16:50,511 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:16:50,511 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:16:50,512 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:24" (3/4) ... [2020-10-20 06:16:50,537 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 06:16:50,558 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-20 06:16:50,558 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-20 06:16:50,559 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-20 06:16:50,571 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-20 06:16:50,572 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 06:16:50,573 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 06:16:50,574 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 06:16:50,696 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:16:50,696 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:16:50,700 INFO L168 Benchmark]: Toolchain (without parser) took 26989.78 ms. Allocated memory was 35.7 MB in the beginning and 790.6 MB in the end (delta: 755.0 MB). Free memory was 15.5 MB in the beginning and 402.2 MB in the end (delta: -386.7 MB). Peak memory consumption was 368.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:50,700 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 34.1 MB. Free memory was 9.8 MB in the beginning and 9.7 MB in the end (delta: 42.1 kB). Peak memory consumption was 42.1 kB. Max. memory is 14.3 GB. [2020-10-20 06:16:50,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 425.72 ms. Allocated memory was 35.7 MB in the beginning and 45.1 MB in the end (delta: 9.4 MB). Free memory was 14.6 MB in the beginning and 25.9 MB in the end (delta: -11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:50,702 INFO L168 Benchmark]: Boogie Preprocessor took 49.95 ms. Allocated memory is still 45.1 MB. Free memory was 25.9 MB in the beginning and 23.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:50,702 INFO L168 Benchmark]: RCFGBuilder took 442.07 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 23.6 MB in the beginning and 26.9 MB in the end (delta: -3.3 MB). Peak memory consumption was 11.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:50,703 INFO L168 Benchmark]: TraceAbstraction took 25875.09 ms. Allocated memory was 46.1 MB in the beginning and 790.6 MB in the end (delta: 744.5 MB). Free memory was 26.4 MB in the beginning and 410.4 MB in the end (delta: -384.0 MB). Peak memory consumption was 545.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:50,704 INFO L168 Benchmark]: Witness Printer took 186.13 ms. Allocated memory is still 790.6 MB. Free memory was 410.4 MB in the beginning and 402.2 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:50,707 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 34.1 MB. Free memory was 9.8 MB in the beginning and 9.7 MB in the end (delta: 42.1 kB). Peak memory consumption was 42.1 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 425.72 ms. Allocated memory was 35.7 MB in the beginning and 45.1 MB in the end (delta: 9.4 MB). Free memory was 14.6 MB in the beginning and 25.9 MB in the end (delta: -11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 49.95 ms. Allocated memory is still 45.1 MB. Free memory was 25.9 MB in the beginning and 23.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 442.07 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 23.6 MB in the beginning and 26.9 MB in the end (delta: -3.3 MB). Peak memory consumption was 11.7 MB. Max. memory is 14.3 GB. * TraceAbstraction took 25875.09 ms. Allocated memory was 46.1 MB in the beginning and 790.6 MB in the end (delta: 744.5 MB). Free memory was 26.4 MB in the beginning and 410.4 MB in the end (delta: -384.0 MB). Peak memory consumption was 545.1 MB. Max. memory is 14.3 GB. * Witness Printer took 186.13 ms. Allocated memory is still 790.6 MB. Free memory was 410.4 MB in the beginning and 402.2 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 56 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.7s, OverallIterations: 34, TraceHistogramMax: 1, AutomataDifference: 9.8s, 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, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 235 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s 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: 11.1s AutomataMinimizationTime, 34 MinimizatonAttempts, 16387 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.7s 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...