./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/locks/test_locks_5.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 d28fd50bd3f7e49bee026aec860ad9015a4fdfba ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:23:44,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:23:44,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:23:45,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:23:45,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:23:45,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:23:45,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:23:45,054 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:23:45,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:23:45,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:23:45,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:23:45,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:23:45,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:23:45,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:23:45,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:23:45,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:23:45,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:23:45,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:23:45,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:23:45,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:23:45,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:23:45,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:23:45,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:23:45,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:23:45,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:23:45,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:23:45,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:23:45,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:23:45,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:23:45,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:23:45,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:23:45,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:23:45,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:23:45,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:23:45,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:23:45,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:23:45,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:23:45,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:23:45,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:23:45,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:23:45,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:23:45,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:23:45,163 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:23:45,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:23:45,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:23:45,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:23:45,166 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:23:45,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:23:45,167 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:23:45,167 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:23:45,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:23:45,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:23:45,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:23:45,169 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:23:45,169 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:23:45,170 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:23:45,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:23:45,171 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:23:45,171 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:23:45,171 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:23:45,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:23:45,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:23:45,172 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:23:45,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:23:45,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:23:45,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:23:45,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:23:45,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:23:45,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:23:45,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:23:45,173 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 -> d28fd50bd3f7e49bee026aec860ad9015a4fdfba [2020-10-19 18:23:45,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:23:45,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:23:45,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:23:45,535 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:23:45,536 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:23:45,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_5.c [2020-10-19 18:23:45,617 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/654caada1/79bf393f65de4345925ee0bf4e3db32e/FLAGbdd84d5a2 [2020-10-19 18:23:46,102 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:23:46,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_5.c [2020-10-19 18:23:46,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/654caada1/79bf393f65de4345925ee0bf4e3db32e/FLAGbdd84d5a2 [2020-10-19 18:23:46,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/654caada1/79bf393f65de4345925ee0bf4e3db32e [2020-10-19 18:23:46,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:23:46,484 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:23:46,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:46,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:23:46,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:23:46,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:46" (1/1) ... [2020-10-19 18:23:46,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d8506a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:46, skipping insertion in model container [2020-10-19 18:23:46,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:46" (1/1) ... [2020-10-19 18:23:46,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:23:46,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:23:46,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:46,724 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:23:46,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:46,763 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:23:46,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:46 WrapperNode [2020-10-19 18:23:46,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:46,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:23:46,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:23:46,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:23:46,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:46" (1/1) ... [2020-10-19 18:23:46,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:46" (1/1) ... [2020-10-19 18:23:46,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:46" (1/1) ... [2020-10-19 18:23:46,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:46" (1/1) ... [2020-10-19 18:23:46,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:46" (1/1) ... [2020-10-19 18:23:46,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:46" (1/1) ... [2020-10-19 18:23:46,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:46" (1/1) ... [2020-10-19 18:23:46,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:23:46,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:23:46,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:23:46,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:23:46,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:23:46,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:23:46,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:23:46,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:23:46,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:23:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:23:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:23:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:23:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:23:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:23:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:23:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:23:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:23:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:23:46,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:23:46,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:23:46,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:23:47,296 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:23:47,296 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-19 18:23:47,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:47 BoogieIcfgContainer [2020-10-19 18:23:47,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:23:47,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:23:47,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:23:47,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:23:47,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:23:46" (1/3) ... [2020-10-19 18:23:47,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d43b438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:47, skipping insertion in model container [2020-10-19 18:23:47,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:46" (2/3) ... [2020-10-19 18:23:47,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d43b438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:47, skipping insertion in model container [2020-10-19 18:23:47,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:47" (3/3) ... [2020-10-19 18:23:47,307 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-10-19 18:23:47,319 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:23:47,327 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-19 18:23:47,341 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-19 18:23:47,360 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:23:47,360 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:23:47,360 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:23:47,360 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:23:47,361 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:23:47,361 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:23:47,361 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:23:47,361 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:23:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-19 18:23:47,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:23:47,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:47,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:47,385 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:47,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:47,391 INFO L82 PathProgramCache]: Analyzing trace with hash -55357090, now seen corresponding path program 1 times [2020-10-19 18:23:47,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:47,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483211594] [2020-10-19 18:23:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:47,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:47,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483211594] [2020-10-19 18:23:47,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:47,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:23:47,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735752929] [2020-10-19 18:23:47,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:23:47,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:47,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:23:47,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:23:47,649 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-19 18:23:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:47,699 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2020-10-19 18:23:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:23:47,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-19 18:23:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:47,715 INFO L225 Difference]: With dead ends: 31 [2020-10-19 18:23:47,716 INFO L226 Difference]: Without dead ends: 26 [2020-10-19 18:23:47,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:23:47,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-19 18:23:47,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-19 18:23:47,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-19 18:23:47,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 40 transitions. [2020-10-19 18:23:47,755 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 40 transitions. Word has length 9 [2020-10-19 18:23:47,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:47,755 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 40 transitions. [2020-10-19 18:23:47,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:23:47,755 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 40 transitions. [2020-10-19 18:23:47,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 18:23:47,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:47,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:47,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:23:47,757 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:47,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:47,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2007343126, now seen corresponding path program 1 times [2020-10-19 18:23:47,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:47,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372042921] [2020-10-19 18:23:47,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:47,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:47,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372042921] [2020-10-19 18:23:47,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:47,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:47,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343730175] [2020-10-19 18:23:47,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:47,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:47,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:47,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:47,866 INFO L87 Difference]: Start difference. First operand 26 states and 40 transitions. Second operand 4 states. [2020-10-19 18:23:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:48,002 INFO L93 Difference]: Finished difference Result 43 states and 70 transitions. [2020-10-19 18:23:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:48,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-19 18:23:48,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:48,005 INFO L225 Difference]: With dead ends: 43 [2020-10-19 18:23:48,005 INFO L226 Difference]: Without dead ends: 43 [2020-10-19 18:23:48,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-19 18:23:48,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2020-10-19 18:23:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-19 18:23:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 51 transitions. [2020-10-19 18:23:48,013 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 51 transitions. Word has length 17 [2020-10-19 18:23:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:48,014 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 51 transitions. [2020-10-19 18:23:48,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:48,014 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 51 transitions. [2020-10-19 18:23:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 18:23:48,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:48,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:48,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:23:48,016 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:48,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:48,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1607565800, now seen corresponding path program 1 times [2020-10-19 18:23:48,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:48,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186179650] [2020-10-19 18:23:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:48,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:48,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186179650] [2020-10-19 18:23:48,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:48,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:48,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312384172] [2020-10-19 18:23:48,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:48,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:48,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:48,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:48,102 INFO L87 Difference]: Start difference. First operand 32 states and 51 transitions. Second operand 4 states. [2020-10-19 18:23:48,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:48,229 INFO L93 Difference]: Finished difference Result 43 states and 68 transitions. [2020-10-19 18:23:48,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:48,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-19 18:23:48,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:48,231 INFO L225 Difference]: With dead ends: 43 [2020-10-19 18:23:48,231 INFO L226 Difference]: Without dead ends: 43 [2020-10-19 18:23:48,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-19 18:23:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-19 18:23:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-19 18:23:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 67 transitions. [2020-10-19 18:23:48,239 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 67 transitions. Word has length 17 [2020-10-19 18:23:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:48,239 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 67 transitions. [2020-10-19 18:23:48,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 67 transitions. [2020-10-19 18:23:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 18:23:48,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:48,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:48,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:23:48,241 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:48,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:48,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2104752446, now seen corresponding path program 1 times [2020-10-19 18:23:48,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:48,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086263558] [2020-10-19 18:23:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:48,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:48,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086263558] [2020-10-19 18:23:48,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:48,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:48,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383145072] [2020-10-19 18:23:48,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:48,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:48,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:48,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:48,325 INFO L87 Difference]: Start difference. First operand 42 states and 67 transitions. Second operand 4 states. [2020-10-19 18:23:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:48,442 INFO L93 Difference]: Finished difference Result 46 states and 70 transitions. [2020-10-19 18:23:48,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:48,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-19 18:23:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:48,444 INFO L225 Difference]: With dead ends: 46 [2020-10-19 18:23:48,444 INFO L226 Difference]: Without dead ends: 46 [2020-10-19 18:23:48,445 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 [2020-10-19 18:23:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-19 18:23:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-19 18:23:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 18:23:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2020-10-19 18:23:48,452 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 18 [2020-10-19 18:23:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:48,452 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2020-10-19 18:23:48,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2020-10-19 18:23:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 18:23:48,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:48,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:48,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:23:48,454 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:48,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:48,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1711725436, now seen corresponding path program 1 times [2020-10-19 18:23:48,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:48,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390149122] [2020-10-19 18:23:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:48,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:48,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390149122] [2020-10-19 18:23:48,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:48,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:48,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982563179] [2020-10-19 18:23:48,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:48,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:48,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:48,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:48,547 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand 4 states. [2020-10-19 18:23:48,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:48,677 INFO L93 Difference]: Finished difference Result 77 states and 119 transitions. [2020-10-19 18:23:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:48,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-19 18:23:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:48,680 INFO L225 Difference]: With dead ends: 77 [2020-10-19 18:23:48,680 INFO L226 Difference]: Without dead ends: 77 [2020-10-19 18:23:48,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:48,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-19 18:23:48,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-19 18:23:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-19 18:23:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 118 transitions. [2020-10-19 18:23:48,696 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 118 transitions. Word has length 18 [2020-10-19 18:23:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:48,696 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 118 transitions. [2020-10-19 18:23:48,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 118 transitions. [2020-10-19 18:23:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 18:23:48,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:48,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:48,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:23:48,700 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:48,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1031667066, now seen corresponding path program 1 times [2020-10-19 18:23:48,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:48,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219091522] [2020-10-19 18:23:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:48,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:48,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219091522] [2020-10-19 18:23:48,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:48,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:48,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371482547] [2020-10-19 18:23:48,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:48,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:48,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:48,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:48,797 INFO L87 Difference]: Start difference. First operand 76 states and 118 transitions. Second operand 4 states. [2020-10-19 18:23:48,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:48,935 INFO L93 Difference]: Finished difference Result 93 states and 145 transitions. [2020-10-19 18:23:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:48,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-19 18:23:48,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:48,937 INFO L225 Difference]: With dead ends: 93 [2020-10-19 18:23:48,937 INFO L226 Difference]: Without dead ends: 93 [2020-10-19 18:23:48,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:48,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-19 18:23:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-10-19 18:23:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-19 18:23:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 116 transitions. [2020-10-19 18:23:48,945 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 116 transitions. Word has length 18 [2020-10-19 18:23:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:48,946 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 116 transitions. [2020-10-19 18:23:48,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 116 transitions. [2020-10-19 18:23:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 18:23:48,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:48,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:48,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 18:23:48,949 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:48,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:48,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1530549219, now seen corresponding path program 1 times [2020-10-19 18:23:48,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:48,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582939038] [2020-10-19 18:23:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:49,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:49,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582939038] [2020-10-19 18:23:49,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:49,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:49,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677802518] [2020-10-19 18:23:49,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:49,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:49,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:49,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:49,013 INFO L87 Difference]: Start difference. First operand 76 states and 116 transitions. Second operand 4 states. [2020-10-19 18:23:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:49,113 INFO L93 Difference]: Finished difference Result 129 states and 199 transitions. [2020-10-19 18:23:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:49,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-19 18:23:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:49,115 INFO L225 Difference]: With dead ends: 129 [2020-10-19 18:23:49,115 INFO L226 Difference]: Without dead ends: 129 [2020-10-19 18:23:49,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-19 18:23:49,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 104. [2020-10-19 18:23:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-19 18:23:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 158 transitions. [2020-10-19 18:23:49,125 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 158 transitions. Word has length 19 [2020-10-19 18:23:49,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:49,126 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 158 transitions. [2020-10-19 18:23:49,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:49,126 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 158 transitions. [2020-10-19 18:23:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 18:23:49,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:49,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:49,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:23:49,129 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:49,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:49,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2084359707, now seen corresponding path program 1 times [2020-10-19 18:23:49,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:49,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125823029] [2020-10-19 18:23:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:49,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:49,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125823029] [2020-10-19 18:23:49,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:49,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:49,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394345599] [2020-10-19 18:23:49,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:49,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:49,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:49,203 INFO L87 Difference]: Start difference. First operand 104 states and 158 transitions. Second operand 4 states. [2020-10-19 18:23:49,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:49,313 INFO L93 Difference]: Finished difference Result 137 states and 201 transitions. [2020-10-19 18:23:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:49,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-19 18:23:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:49,316 INFO L225 Difference]: With dead ends: 137 [2020-10-19 18:23:49,316 INFO L226 Difference]: Without dead ends: 137 [2020-10-19 18:23:49,317 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 [2020-10-19 18:23:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-19 18:23:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-19 18:23:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-19 18:23:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 200 transitions. [2020-10-19 18:23:49,340 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 200 transitions. Word has length 19 [2020-10-19 18:23:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:49,341 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 200 transitions. [2020-10-19 18:23:49,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:49,341 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 200 transitions. [2020-10-19 18:23:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:23:49,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:49,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:49,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 18:23:49,346 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:49,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:49,347 INFO L82 PathProgramCache]: Analyzing trace with hash 209064359, now seen corresponding path program 1 times [2020-10-19 18:23:49,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:49,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291586030] [2020-10-19 18:23:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:49,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:49,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291586030] [2020-10-19 18:23:49,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:49,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:49,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804451274] [2020-10-19 18:23:49,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:49,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:49,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:49,436 INFO L87 Difference]: Start difference. First operand 136 states and 200 transitions. Second operand 4 states. [2020-10-19 18:23:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:49,527 INFO L93 Difference]: Finished difference Result 143 states and 205 transitions. [2020-10-19 18:23:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:49,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 18:23:49,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:49,529 INFO L225 Difference]: With dead ends: 143 [2020-10-19 18:23:49,529 INFO L226 Difference]: Without dead ends: 143 [2020-10-19 18:23:49,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-19 18:23:49,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-19 18:23:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-19 18:23:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 204 transitions. [2020-10-19 18:23:49,551 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 204 transitions. Word has length 20 [2020-10-19 18:23:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:49,552 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 204 transitions. [2020-10-19 18:23:49,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:49,552 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 204 transitions. [2020-10-19 18:23:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:23:49,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:49,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:49,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 18:23:49,557 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash -183962651, now seen corresponding path program 1 times [2020-10-19 18:23:49,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:49,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127608743] [2020-10-19 18:23:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:49,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:49,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127608743] [2020-10-19 18:23:49,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:49,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:49,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954140454] [2020-10-19 18:23:49,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:49,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:49,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:49,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:49,624 INFO L87 Difference]: Start difference. First operand 142 states and 204 transitions. Second operand 4 states. [2020-10-19 18:23:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:49,706 INFO L93 Difference]: Finished difference Result 235 states and 333 transitions. [2020-10-19 18:23:49,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:49,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 18:23:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:49,709 INFO L225 Difference]: With dead ends: 235 [2020-10-19 18:23:49,709 INFO L226 Difference]: Without dead ends: 235 [2020-10-19 18:23:49,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-19 18:23:49,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 202. [2020-10-19 18:23:49,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-19 18:23:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 284 transitions. [2020-10-19 18:23:49,718 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 284 transitions. Word has length 20 [2020-10-19 18:23:49,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:49,718 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 284 transitions. [2020-10-19 18:23:49,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:49,719 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 284 transitions. [2020-10-19 18:23:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:23:49,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:49,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:49,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 18:23:49,721 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:49,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:49,722 INFO L82 PathProgramCache]: Analyzing trace with hash 496095719, now seen corresponding path program 1 times [2020-10-19 18:23:49,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:49,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784927499] [2020-10-19 18:23:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:49,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:49,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784927499] [2020-10-19 18:23:49,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:49,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:49,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553107394] [2020-10-19 18:23:49,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:49,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:49,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:49,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:49,775 INFO L87 Difference]: Start difference. First operand 202 states and 284 transitions. Second operand 4 states. [2020-10-19 18:23:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:49,872 INFO L93 Difference]: Finished difference Result 259 states and 345 transitions. [2020-10-19 18:23:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:49,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 18:23:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:49,874 INFO L225 Difference]: With dead ends: 259 [2020-10-19 18:23:49,875 INFO L226 Difference]: Without dead ends: 259 [2020-10-19 18:23:49,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-19 18:23:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2020-10-19 18:23:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-19 18:23:49,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 344 transitions. [2020-10-19 18:23:49,883 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 344 transitions. Word has length 20 [2020-10-19 18:23:49,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:49,883 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 344 transitions. [2020-10-19 18:23:49,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:49,883 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 344 transitions. [2020-10-19 18:23:49,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:23:49,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:49,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:49,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 18:23:49,885 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:49,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:49,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1401185488, now seen corresponding path program 1 times [2020-10-19 18:23:49,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:49,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704770556] [2020-10-19 18:23:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:49,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:49,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704770556] [2020-10-19 18:23:49,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:49,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:49,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959230340] [2020-10-19 18:23:49,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:49,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:49,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:49,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:49,959 INFO L87 Difference]: Start difference. First operand 258 states and 344 transitions. Second operand 4 states. [2020-10-19 18:23:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:50,042 INFO L93 Difference]: Finished difference Result 267 states and 345 transitions. [2020-10-19 18:23:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:50,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-19 18:23:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:50,044 INFO L225 Difference]: With dead ends: 267 [2020-10-19 18:23:50,044 INFO L226 Difference]: Without dead ends: 267 [2020-10-19 18:23:50,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:50,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-19 18:23:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2020-10-19 18:23:50,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-19 18:23:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 344 transitions. [2020-10-19 18:23:50,052 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 344 transitions. Word has length 21 [2020-10-19 18:23:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:50,052 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 344 transitions. [2020-10-19 18:23:50,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 344 transitions. [2020-10-19 18:23:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:23:50,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:50,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:50,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 18:23:50,054 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:50,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:50,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1794212498, now seen corresponding path program 1 times [2020-10-19 18:23:50,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:50,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850001437] [2020-10-19 18:23:50,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:50,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:50,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850001437] [2020-10-19 18:23:50,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:50,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:50,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002700042] [2020-10-19 18:23:50,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:50,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:50,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:50,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:50,100 INFO L87 Difference]: Start difference. First operand 266 states and 344 transitions. Second operand 4 states. [2020-10-19 18:23:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:50,179 INFO L93 Difference]: Finished difference Result 426 states and 528 transitions. [2020-10-19 18:23:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:50,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-19 18:23:50,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:50,182 INFO L225 Difference]: With dead ends: 426 [2020-10-19 18:23:50,182 INFO L226 Difference]: Without dead ends: 426 [2020-10-19 18:23:50,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:50,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-19 18:23:50,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 394. [2020-10-19 18:23:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-19 18:23:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 496 transitions. [2020-10-19 18:23:50,191 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 496 transitions. Word has length 21 [2020-10-19 18:23:50,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:50,192 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 496 transitions. [2020-10-19 18:23:50,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 496 transitions. [2020-10-19 18:23:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:23:50,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:50,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:50,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 18:23:50,194 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:50,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:50,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1114154128, now seen corresponding path program 1 times [2020-10-19 18:23:50,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:50,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924882657] [2020-10-19 18:23:50,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:50,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:50,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924882657] [2020-10-19 18:23:50,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:50,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:50,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44845138] [2020-10-19 18:23:50,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:50,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:50,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:50,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:50,238 INFO L87 Difference]: Start difference. First operand 394 states and 496 transitions. Second operand 4 states. [2020-10-19 18:23:50,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:50,312 INFO L93 Difference]: Finished difference Result 487 states and 566 transitions. [2020-10-19 18:23:50,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:50,313 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-19 18:23:50,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:50,313 INFO L225 Difference]: With dead ends: 487 [2020-10-19 18:23:50,313 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:23:50,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:50,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:23:50,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:23:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:23:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:23:50,314 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-10-19 18:23:50,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:50,315 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:23:50,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:23:50,315 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:23:50,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 18:23:50,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:23:50 BoogieIcfgContainer [2020-10-19 18:23:50,321 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:23:50,321 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:23:50,321 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:23:50,322 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:23:50,322 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:47" (3/4) ... [2020-10-19 18:23:50,327 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:23:50,335 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-19 18:23:50,335 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 18:23:50,335 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 18:23:50,342 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-19 18:23:50,342 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-19 18:23:50,342 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-19 18:23:50,343 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 18:23:50,397 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:23:50,397 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:23:50,400 INFO L168 Benchmark]: Toolchain (without parser) took 3920.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 208.1 MB). Free memory was 953.3 MB in the beginning and 1.1 GB in the end (delta: -172.2 MB). Peak memory consumption was 36.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:50,400 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:23:50,401 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.18 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:50,402 INFO L168 Benchmark]: Boogie Preprocessor took 101.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -187.8 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:50,402 INFO L168 Benchmark]: RCFGBuilder took 426.65 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:50,403 INFO L168 Benchmark]: TraceAbstraction took 3021.44 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -14.4 MB). Peak memory consumption was 53.3 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:50,403 INFO L168 Benchmark]: Witness Printer took 76.31 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:23:50,406 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 278.18 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 101.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -187.8 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 426.65 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3021.44 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -14.4 MB). Peak memory consumption was 53.3 MB. Max. memory is 11.5 GB. * Witness Printer took 76.31 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 35 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.9s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 662 SDtfs, 848 SDslu, 101 SDs, 0 SdLazy, 451 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=394occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 125 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 258 NumberOfCodeBlocks, 258 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 244 ConstructedInterpolants, 0 QuantifiedInterpolants, 14514 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...