./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 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/locks/test_locks_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 0.1.25-9a8b2e8 [2020-10-20 06:16:32,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:16:32,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:16:32,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:16:32,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:16:32,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:16:32,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:16:32,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:16:32,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:16:32,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:16:32,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:16:32,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:16:32,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:16:32,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:16:32,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:16:32,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:16:32,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:16:32,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:16:32,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:16:32,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:16:32,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:16:32,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:16:32,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:16:32,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:16:32,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:16:32,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:16:32,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:16:32,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:16:32,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:16:32,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:16:32,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:16:32,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:16:32,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:16:32,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:16:32,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:16:32,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:16:32,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:16:32,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:16:32,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:16:32,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:16:32,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:16:32,787 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 06:16:32,830 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:16:32,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:16:32,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:16:32,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:16:32,836 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:16:32,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:16:32,837 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:16:32,837 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:16:32,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:16:32,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:16:32,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:16:32,839 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:16:32,839 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:16:32,840 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 06:16:32,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:16:32,840 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:16:32,841 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:16:32,841 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:16:32,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:16:32,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:16:32,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:16:32,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:16:32,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:16:32,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:16:32,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:16:32,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:16:32,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:16:32,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:16:32,843 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 [2020-10-20 06:16:33,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:16:33,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:16:33,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:16:33,087 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:16:33,087 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:16:33,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_5.c [2020-10-20 06:16:33,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9585db94/544f819eaa4b448e940b7a6e9571529b/FLAGd109ad4a0 [2020-10-20 06:16:33,626 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:16:33,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_5.c [2020-10-20 06:16:33,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9585db94/544f819eaa4b448e940b7a6e9571529b/FLAGd109ad4a0 [2020-10-20 06:16:33,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9585db94/544f819eaa4b448e940b7a6e9571529b [2020-10-20 06:16:33,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:16:33,942 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:16:33,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:16:33,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:16:33,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:16:33,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:16:33" (1/1) ... [2020-10-20 06:16:33,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236ffff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:33, skipping insertion in model container [2020-10-20 06:16:33,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:16:33" (1/1) ... [2020-10-20 06:16:33,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:16:33,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:16:34,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:16:34,272 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:16:34,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:16:34,314 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:16:34,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34 WrapperNode [2020-10-20 06:16:34,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:16:34,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:16:34,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:16:34,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:16:34,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... [2020-10-20 06:16:34,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:16:34,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:16:34,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:16:34,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:16:34,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:16:34,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 06:16:34,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:16:34,429 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-20 06:16:34,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 06:16:34,429 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 06:16:34,430 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-20 06:16:34,430 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-20 06:16:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:16:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 06:16:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 06:16:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 06:16:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:16:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:16:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 06:16:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 06:16:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:16:34,729 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:16:34,729 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-20 06:16:34,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:34 BoogieIcfgContainer [2020-10-20 06:16:34,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:16:34,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:16:34,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:16:34,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:16:34,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:16:33" (1/3) ... [2020-10-20 06:16:34,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df55617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:16:34, skipping insertion in model container [2020-10-20 06:16:34,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:34" (2/3) ... [2020-10-20 06:16:34,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df55617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:16:34, skipping insertion in model container [2020-10-20 06:16:34,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:34" (3/3) ... [2020-10-20 06:16:34,743 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-10-20 06:16:34,762 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:16:34,771 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 06:16:34,791 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 06:16:34,831 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:16:34,831 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 06:16:34,832 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:16:34,832 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:16:34,832 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:16:34,832 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:16:34,833 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:16:34,833 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:16:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-20 06:16:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 06:16:34,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:34,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:34,870 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:34,877 INFO L82 PathProgramCache]: Analyzing trace with hash -55357090, now seen corresponding path program 1 times [2020-10-20 06:16:34,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:34,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82975365] [2020-10-20 06:16:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:35,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82975365] [2020-10-20 06:16:35,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:35,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:16:35,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691503810] [2020-10-20 06:16:35,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:16:35,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:35,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:16:35,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:16:35,179 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-20 06:16:35,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:35,227 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2020-10-20 06:16:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:16:35,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-20 06:16:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:35,240 INFO L225 Difference]: With dead ends: 31 [2020-10-20 06:16:35,240 INFO L226 Difference]: Without dead ends: 26 [2020-10-20 06:16:35,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:16:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-20 06:16:35,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-20 06:16:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 06:16:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 40 transitions. [2020-10-20 06:16:35,276 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 40 transitions. Word has length 9 [2020-10-20 06:16:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:35,276 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 40 transitions. [2020-10-20 06:16:35,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:16:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 40 transitions. [2020-10-20 06:16:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 06:16:35,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:35,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:35,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:16:35,278 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2007343126, now seen corresponding path program 1 times [2020-10-20 06:16:35,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:35,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449208909] [2020-10-20 06:16:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:35,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449208909] [2020-10-20 06:16:35,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:35,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:35,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237881706] [2020-10-20 06:16:35,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:35,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:35,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:35,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:35,399 INFO L87 Difference]: Start difference. First operand 26 states and 40 transitions. Second operand 4 states. [2020-10-20 06:16:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:35,560 INFO L93 Difference]: Finished difference Result 43 states and 70 transitions. [2020-10-20 06:16:35,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:35,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-20 06:16:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:35,563 INFO L225 Difference]: With dead ends: 43 [2020-10-20 06:16:35,564 INFO L226 Difference]: Without dead ends: 43 [2020-10-20 06:16:35,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-20 06:16:35,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2020-10-20 06:16:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 06:16:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 51 transitions. [2020-10-20 06:16:35,573 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 51 transitions. Word has length 17 [2020-10-20 06:16:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:35,574 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 51 transitions. [2020-10-20 06:16:35,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 51 transitions. [2020-10-20 06:16:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 06:16:35,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:35,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:35,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:16:35,577 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:35,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1607565800, now seen corresponding path program 1 times [2020-10-20 06:16:35,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:35,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470286726] [2020-10-20 06:16:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:35,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470286726] [2020-10-20 06:16:35,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:35,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:35,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314854881] [2020-10-20 06:16:35,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:35,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:35,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:35,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:35,690 INFO L87 Difference]: Start difference. First operand 32 states and 51 transitions. Second operand 4 states. [2020-10-20 06:16:35,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:35,820 INFO L93 Difference]: Finished difference Result 43 states and 68 transitions. [2020-10-20 06:16:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:35,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-20 06:16:35,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:35,823 INFO L225 Difference]: With dead ends: 43 [2020-10-20 06:16:35,823 INFO L226 Difference]: Without dead ends: 43 [2020-10-20 06:16:35,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-20 06:16:35,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-20 06:16:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 06:16:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 67 transitions. [2020-10-20 06:16:35,831 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 67 transitions. Word has length 17 [2020-10-20 06:16:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:35,832 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 67 transitions. [2020-10-20 06:16:35,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:35,832 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 67 transitions. [2020-10-20 06:16:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 06:16:35,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:35,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:35,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 06:16:35,834 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:35,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2104752446, now seen corresponding path program 1 times [2020-10-20 06:16:35,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:35,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834941492] [2020-10-20 06:16:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:35,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834941492] [2020-10-20 06:16:35,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:35,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:35,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600422012] [2020-10-20 06:16:35,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:35,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:35,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:35,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:35,916 INFO L87 Difference]: Start difference. First operand 42 states and 67 transitions. Second operand 4 states. [2020-10-20 06:16:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:36,046 INFO L93 Difference]: Finished difference Result 46 states and 70 transitions. [2020-10-20 06:16:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:36,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-20 06:16:36,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:36,048 INFO L225 Difference]: With dead ends: 46 [2020-10-20 06:16:36,048 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 06:16:36,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 06:16:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-20 06:16:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 06:16:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2020-10-20 06:16:36,056 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 18 [2020-10-20 06:16:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:36,057 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2020-10-20 06:16:36,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2020-10-20 06:16:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 06:16:36,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:36,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:36,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 06:16:36,059 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:36,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1711725436, now seen corresponding path program 1 times [2020-10-20 06:16:36,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:36,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566846900] [2020-10-20 06:16:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:36,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566846900] [2020-10-20 06:16:36,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:36,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:36,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826879423] [2020-10-20 06:16:36,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:36,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:36,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:36,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:36,126 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand 4 states. [2020-10-20 06:16:36,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:36,236 INFO L93 Difference]: Finished difference Result 77 states and 119 transitions. [2020-10-20 06:16:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:36,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-20 06:16:36,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:36,239 INFO L225 Difference]: With dead ends: 77 [2020-10-20 06:16:36,239 INFO L226 Difference]: Without dead ends: 77 [2020-10-20 06:16:36,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-20 06:16:36,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-20 06:16:36,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-20 06:16:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 118 transitions. [2020-10-20 06:16:36,248 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 118 transitions. Word has length 18 [2020-10-20 06:16:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:36,249 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 118 transitions. [2020-10-20 06:16:36,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 118 transitions. [2020-10-20 06:16:36,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 06:16:36,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:36,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:36,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 06:16:36,251 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:36,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:36,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1031667066, now seen corresponding path program 1 times [2020-10-20 06:16:36,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:36,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034463028] [2020-10-20 06:16:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:36,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034463028] [2020-10-20 06:16:36,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:36,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:36,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488027569] [2020-10-20 06:16:36,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:36,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:36,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:36,312 INFO L87 Difference]: Start difference. First operand 76 states and 118 transitions. Second operand 4 states. [2020-10-20 06:16:36,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:36,419 INFO L93 Difference]: Finished difference Result 93 states and 145 transitions. [2020-10-20 06:16:36,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:36,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-20 06:16:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:36,422 INFO L225 Difference]: With dead ends: 93 [2020-10-20 06:16:36,422 INFO L226 Difference]: Without dead ends: 93 [2020-10-20 06:16:36,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-20 06:16:36,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-10-20 06:16:36,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-20 06:16:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 116 transitions. [2020-10-20 06:16:36,430 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 116 transitions. Word has length 18 [2020-10-20 06:16:36,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:36,430 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 116 transitions. [2020-10-20 06:16:36,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:36,431 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 116 transitions. [2020-10-20 06:16:36,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 06:16:36,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:36,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:36,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 06:16:36,433 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:36,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1530549219, now seen corresponding path program 1 times [2020-10-20 06:16:36,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:36,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944576104] [2020-10-20 06:16:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:36,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944576104] [2020-10-20 06:16:36,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:36,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:36,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359983384] [2020-10-20 06:16:36,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:36,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:36,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:36,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:36,492 INFO L87 Difference]: Start difference. First operand 76 states and 116 transitions. Second operand 4 states. [2020-10-20 06:16:36,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:36,593 INFO L93 Difference]: Finished difference Result 129 states and 199 transitions. [2020-10-20 06:16:36,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:36,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-20 06:16:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:36,595 INFO L225 Difference]: With dead ends: 129 [2020-10-20 06:16:36,595 INFO L226 Difference]: Without dead ends: 129 [2020-10-20 06:16:36,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:36,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-20 06:16:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 104. [2020-10-20 06:16:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-20 06:16:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 158 transitions. [2020-10-20 06:16:36,604 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 158 transitions. Word has length 19 [2020-10-20 06:16:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:36,605 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 158 transitions. [2020-10-20 06:16:36,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 158 transitions. [2020-10-20 06:16:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 06:16:36,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:36,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:36,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 06:16:36,607 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:36,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:36,608 INFO L82 PathProgramCache]: Analyzing trace with hash -2084359707, now seen corresponding path program 1 times [2020-10-20 06:16:36,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:36,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574874715] [2020-10-20 06:16:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:36,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574874715] [2020-10-20 06:16:36,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:36,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:36,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536148226] [2020-10-20 06:16:36,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:36,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:36,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:36,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:36,663 INFO L87 Difference]: Start difference. First operand 104 states and 158 transitions. Second operand 4 states. [2020-10-20 06:16:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:36,770 INFO L93 Difference]: Finished difference Result 137 states and 201 transitions. [2020-10-20 06:16:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:36,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-20 06:16:36,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:36,773 INFO L225 Difference]: With dead ends: 137 [2020-10-20 06:16:36,773 INFO L226 Difference]: Without dead ends: 137 [2020-10-20 06:16:36,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:36,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-20 06:16:36,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-20 06:16:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-20 06:16:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 200 transitions. [2020-10-20 06:16:36,782 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 200 transitions. Word has length 19 [2020-10-20 06:16:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:36,782 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 200 transitions. [2020-10-20 06:16:36,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:36,783 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 200 transitions. [2020-10-20 06:16:36,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 06:16:36,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:36,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:36,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 06:16:36,785 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:36,786 INFO L82 PathProgramCache]: Analyzing trace with hash 209064359, now seen corresponding path program 1 times [2020-10-20 06:16:36,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:36,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848857278] [2020-10-20 06:16:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:36,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848857278] [2020-10-20 06:16:36,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:36,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:36,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107601001] [2020-10-20 06:16:36,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:36,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:36,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:36,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:36,858 INFO L87 Difference]: Start difference. First operand 136 states and 200 transitions. Second operand 4 states. [2020-10-20 06:16:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:36,960 INFO L93 Difference]: Finished difference Result 143 states and 205 transitions. [2020-10-20 06:16:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:36,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-20 06:16:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:36,962 INFO L225 Difference]: With dead ends: 143 [2020-10-20 06:16:36,964 INFO L226 Difference]: Without dead ends: 143 [2020-10-20 06:16:36,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-20 06:16:36,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-20 06:16:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-20 06:16:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 204 transitions. [2020-10-20 06:16:36,984 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 204 transitions. Word has length 20 [2020-10-20 06:16:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:36,984 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 204 transitions. [2020-10-20 06:16:36,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 204 transitions. [2020-10-20 06:16:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 06:16:36,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:36,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:36,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 06:16:36,991 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash -183962651, now seen corresponding path program 1 times [2020-10-20 06:16:36,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:36,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080194413] [2020-10-20 06:16:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:37,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080194413] [2020-10-20 06:16:37,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:37,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:37,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713783462] [2020-10-20 06:16:37,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:37,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:37,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:37,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:37,070 INFO L87 Difference]: Start difference. First operand 142 states and 204 transitions. Second operand 4 states. [2020-10-20 06:16:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:37,181 INFO L93 Difference]: Finished difference Result 235 states and 333 transitions. [2020-10-20 06:16:37,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:37,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-20 06:16:37,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:37,184 INFO L225 Difference]: With dead ends: 235 [2020-10-20 06:16:37,184 INFO L226 Difference]: Without dead ends: 235 [2020-10-20 06:16:37,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-20 06:16:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 202. [2020-10-20 06:16:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-20 06:16:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 284 transitions. [2020-10-20 06:16:37,192 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 284 transitions. Word has length 20 [2020-10-20 06:16:37,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:37,192 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 284 transitions. [2020-10-20 06:16:37,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:37,193 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 284 transitions. [2020-10-20 06:16:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 06:16:37,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:37,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:37,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 06:16:37,195 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:37,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:37,195 INFO L82 PathProgramCache]: Analyzing trace with hash 496095719, now seen corresponding path program 1 times [2020-10-20 06:16:37,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:37,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960697531] [2020-10-20 06:16:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:37,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960697531] [2020-10-20 06:16:37,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:37,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:37,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078029196] [2020-10-20 06:16:37,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:37,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:37,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:37,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:37,247 INFO L87 Difference]: Start difference. First operand 202 states and 284 transitions. Second operand 4 states. [2020-10-20 06:16:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:37,326 INFO L93 Difference]: Finished difference Result 259 states and 345 transitions. [2020-10-20 06:16:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:37,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-20 06:16:37,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:37,328 INFO L225 Difference]: With dead ends: 259 [2020-10-20 06:16:37,328 INFO L226 Difference]: Without dead ends: 259 [2020-10-20 06:16:37,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:37,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-20 06:16:37,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2020-10-20 06:16:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-20 06:16:37,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 344 transitions. [2020-10-20 06:16:37,336 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 344 transitions. Word has length 20 [2020-10-20 06:16:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:37,336 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 344 transitions. [2020-10-20 06:16:37,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 344 transitions. [2020-10-20 06:16:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:16:37,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:37,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:37,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-20 06:16:37,350 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:37,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1401185488, now seen corresponding path program 1 times [2020-10-20 06:16:37,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:37,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47603287] [2020-10-20 06:16:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:37,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47603287] [2020-10-20 06:16:37,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:37,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:37,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593703275] [2020-10-20 06:16:37,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:37,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:37,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:37,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:37,408 INFO L87 Difference]: Start difference. First operand 258 states and 344 transitions. Second operand 4 states. [2020-10-20 06:16:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:37,489 INFO L93 Difference]: Finished difference Result 267 states and 345 transitions. [2020-10-20 06:16:37,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:37,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-20 06:16:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:37,492 INFO L225 Difference]: With dead ends: 267 [2020-10-20 06:16:37,492 INFO L226 Difference]: Without dead ends: 267 [2020-10-20 06:16:37,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:37,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-20 06:16:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2020-10-20 06:16:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-20 06:16:37,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 344 transitions. [2020-10-20 06:16:37,498 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 344 transitions. Word has length 21 [2020-10-20 06:16:37,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:37,498 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 344 transitions. [2020-10-20 06:16:37,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:37,499 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 344 transitions. [2020-10-20 06:16:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:16:37,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:37,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:37,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-20 06:16:37,500 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:37,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1794212498, now seen corresponding path program 1 times [2020-10-20 06:16:37,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:37,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429219677] [2020-10-20 06:16:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:37,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429219677] [2020-10-20 06:16:37,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:37,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:37,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368514256] [2020-10-20 06:16:37,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:37,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:37,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:37,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:37,553 INFO L87 Difference]: Start difference. First operand 266 states and 344 transitions. Second operand 4 states. [2020-10-20 06:16:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:37,636 INFO L93 Difference]: Finished difference Result 426 states and 528 transitions. [2020-10-20 06:16:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:37,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-20 06:16:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:37,639 INFO L225 Difference]: With dead ends: 426 [2020-10-20 06:16:37,639 INFO L226 Difference]: Without dead ends: 426 [2020-10-20 06:16:37,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-20 06:16:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 394. [2020-10-20 06:16:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-20 06:16:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 496 transitions. [2020-10-20 06:16:37,649 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 496 transitions. Word has length 21 [2020-10-20 06:16:37,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:37,649 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 496 transitions. [2020-10-20 06:16:37,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:37,649 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 496 transitions. [2020-10-20 06:16:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:16:37,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:37,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:37,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-20 06:16:37,651 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:37,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:37,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1114154128, now seen corresponding path program 1 times [2020-10-20 06:16:37,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:37,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217858269] [2020-10-20 06:16:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:37,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217858269] [2020-10-20 06:16:37,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:37,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:37,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356234559] [2020-10-20 06:16:37,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:37,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:37,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:37,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:37,694 INFO L87 Difference]: Start difference. First operand 394 states and 496 transitions. Second operand 4 states. [2020-10-20 06:16:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:37,814 INFO L93 Difference]: Finished difference Result 487 states and 566 transitions. [2020-10-20 06:16:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:37,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-20 06:16:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:37,815 INFO L225 Difference]: With dead ends: 487 [2020-10-20 06:16:37,816 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 06:16:37,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:37,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 06:16:37,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 06:16:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 06:16:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 06:16:37,817 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-10-20 06:16:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:37,817 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:16:37,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:37,818 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:16:37,819 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 06:16:37,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-20 06:16:37,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:16:37 BoogieIcfgContainer [2020-10-20 06:16:37,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:16:37,828 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:16:37,829 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:16:37,829 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:16:37,830 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:34" (3/4) ... [2020-10-20 06:16:37,848 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 06:16:37,870 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-20 06:16:37,871 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-20 06:16:37,871 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-20 06:16:37,884 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-20 06:16:37,884 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 06:16:37,884 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 06:16:37,885 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 06:16:37,939 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:16:37,939 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:16:37,942 INFO L168 Benchmark]: Toolchain (without parser) took 4004.95 ms. Allocated memory was 34.1 MB in the beginning and 66.1 MB in the end (delta: 32.0 MB). Free memory was 11.3 MB in the beginning and 37.0 MB in the end (delta: -25.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:37,943 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 33.0 MB. Free memory was 17.8 MB in the beginning and 17.8 MB in the end (delta: 40.3 kB). Peak memory consumption was 40.3 kB. Max. memory is 14.3 GB. [2020-10-20 06:16:37,944 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.16 ms. Allocated memory was 34.1 MB in the beginning and 43.0 MB in the end (delta: 8.9 MB). Free memory was 10.4 MB in the beginning and 22.4 MB in the end (delta: -12.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:37,944 INFO L168 Benchmark]: Boogie Preprocessor took 40.57 ms. Allocated memory is still 43.0 MB. Free memory was 22.2 MB in the beginning and 20.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:37,945 INFO L168 Benchmark]: RCFGBuilder took 376.14 ms. Allocated memory was 43.0 MB in the beginning and 45.1 MB in the end (delta: 2.1 MB). Free memory was 20.3 MB in the beginning and 15.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:37,945 INFO L168 Benchmark]: TraceAbstraction took 3093.70 ms. Allocated memory was 45.1 MB in the beginning and 66.1 MB in the end (delta: 21.0 MB). Free memory was 14.6 MB in the beginning and 41.5 MB in the end (delta: -27.0 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 06:16:37,946 INFO L168 Benchmark]: Witness Printer took 111.07 ms. Allocated memory is still 66.1 MB. Free memory was 40.8 MB in the beginning and 37.0 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:37,949 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 33.0 MB. Free memory was 17.8 MB in the beginning and 17.8 MB in the end (delta: 40.3 kB). Peak memory consumption was 40.3 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 372.16 ms. Allocated memory was 34.1 MB in the beginning and 43.0 MB in the end (delta: 8.9 MB). Free memory was 10.4 MB in the beginning and 22.4 MB in the end (delta: -12.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 40.57 ms. Allocated memory is still 43.0 MB. Free memory was 22.2 MB in the beginning and 20.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * RCFGBuilder took 376.14 ms. Allocated memory was 43.0 MB in the beginning and 45.1 MB in the end (delta: 2.1 MB). Free memory was 20.3 MB in the beginning and 15.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 3093.70 ms. Allocated memory was 45.1 MB in the beginning and 66.1 MB in the end (delta: 21.0 MB). Free memory was 14.6 MB in the beginning and 41.5 MB in the end (delta: -27.0 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 111.07 ms. Allocated memory is still 66.1 MB. Free memory was 40.8 MB in the beginning and 37.0 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 35 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, 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, 0.8s 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, 0.7s 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...