./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_7.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/locks/test_locks_7.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 d2a1f90505878c0035f7701a954d17ca4375eb05 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:23:52,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:23:52,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:23:52,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:23:52,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:23:52,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:23:52,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:23:52,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:23:52,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:23:52,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:23:52,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:23:52,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:23:52,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:23:52,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:23:52,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:23:52,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:23:52,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:23:52,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:23:52,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:23:52,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:23:52,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:23:52,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:23:52,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:23:52,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:23:52,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:23:52,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:23:52,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:23:52,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:23:52,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:23:52,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:23:52,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:23:52,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:23:52,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:23:52,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:23:52,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:23:52,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:23:52,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:23:52,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:23:52,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:23:52,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:23:52,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:23:52,737 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:23:52,780 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:23:52,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:23:52,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:23:52,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:23:52,784 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:23:52,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:23:52,784 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:23:52,785 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:23:52,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:23:52,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:23:52,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:23:52,787 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:23:52,787 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:23:52,787 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:23:52,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:23:52,788 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:23:52,789 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:23:52,789 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:23:52,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:23:52,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:23:52,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:23:52,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:23:52,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:23:52,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:23:52,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:23:52,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:23:52,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:23:52,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:23:52,792 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 -> d2a1f90505878c0035f7701a954d17ca4375eb05 [2020-10-19 18:23:53,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:23:53,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:23:53,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:23:53,155 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:23:53,156 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:23:53,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_7.c [2020-10-19 18:23:53,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aec529995/1797b5fe9aaa49fd9f8ce42de0837eed/FLAGda921c9c6 [2020-10-19 18:23:53,681 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:23:53,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_7.c [2020-10-19 18:23:53,690 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aec529995/1797b5fe9aaa49fd9f8ce42de0837eed/FLAGda921c9c6 [2020-10-19 18:23:54,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aec529995/1797b5fe9aaa49fd9f8ce42de0837eed [2020-10-19 18:23:54,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:23:54,117 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:23:54,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:54,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:23:54,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:23:54,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:54" (1/1) ... [2020-10-19 18:23:54,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c03c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:54, skipping insertion in model container [2020-10-19 18:23:54,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:54" (1/1) ... [2020-10-19 18:23:54,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:23:54,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:23:54,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:54,472 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:23:54,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:54,575 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:23:54,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:54 WrapperNode [2020-10-19 18:23:54,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:54,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:23:54,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:23:54,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:23:54,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:54" (1/1) ... [2020-10-19 18:23:54,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:54" (1/1) ... [2020-10-19 18:23:54,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:54" (1/1) ... [2020-10-19 18:23:54,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:54" (1/1) ... [2020-10-19 18:23:54,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:54" (1/1) ... [2020-10-19 18:23:54,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:54" (1/1) ... [2020-10-19 18:23:54,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:54" (1/1) ... [2020-10-19 18:23:54,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:23:54,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:23:54,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:23:54,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:23:54,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:23:54,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:23:54,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:23:54,692 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:23:54,693 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:23:54,694 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:23:54,695 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:23:54,695 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:23:54,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:23:54,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:23:54,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:23:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:23:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:23:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:23:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:23:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:23:54,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:23:54,992 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:23:54,992 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-19 18:23:54,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:54 BoogieIcfgContainer [2020-10-19 18:23:54,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:23:54,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:23:54,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:23:55,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:23:55,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:23:54" (1/3) ... [2020-10-19 18:23:55,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486c1893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:55, skipping insertion in model container [2020-10-19 18:23:55,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:54" (2/3) ... [2020-10-19 18:23:55,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486c1893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:55, skipping insertion in model container [2020-10-19 18:23:55,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:54" (3/3) ... [2020-10-19 18:23:55,004 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-10-19 18:23:55,017 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:23:55,028 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-19 18:23:55,049 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-19 18:23:55,087 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:23:55,087 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:23:55,087 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:23:55,088 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:23:55,088 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:23:55,088 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:23:55,088 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:23:55,088 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:23:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-19 18:23:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:23:55,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:55,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:55,129 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:55,136 INFO L82 PathProgramCache]: Analyzing trace with hash -374442078, now seen corresponding path program 1 times [2020-10-19 18:23:55,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:55,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208031174] [2020-10-19 18:23:55,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:55,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:55,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208031174] [2020-10-19 18:23:55,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:55,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:23:55,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269830685] [2020-10-19 18:23:55,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:23:55,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:55,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:23:55,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:23:55,406 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-10-19 18:23:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:55,455 INFO L93 Difference]: Finished difference Result 37 states and 57 transitions. [2020-10-19 18:23:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:23:55,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-19 18:23:55,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:55,468 INFO L225 Difference]: With dead ends: 37 [2020-10-19 18:23:55,468 INFO L226 Difference]: Without dead ends: 32 [2020-10-19 18:23:55,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:23:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-19 18:23:55,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-19 18:23:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-19 18:23:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 52 transitions. [2020-10-19 18:23:55,511 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 52 transitions. Word has length 9 [2020-10-19 18:23:55,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:55,511 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 52 transitions. [2020-10-19 18:23:55,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:23:55,512 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 52 transitions. [2020-10-19 18:23:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 18:23:55,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:55,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:55,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:23:55,514 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:55,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:55,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1509280444, now seen corresponding path program 1 times [2020-10-19 18:23:55,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:55,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581955829] [2020-10-19 18:23:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:55,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:55,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581955829] [2020-10-19 18:23:55,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:55,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:55,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355447834] [2020-10-19 18:23:55,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:55,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:55,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:55,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:55,656 INFO L87 Difference]: Start difference. First operand 32 states and 52 transitions. Second operand 4 states. [2020-10-19 18:23:55,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:55,820 INFO L93 Difference]: Finished difference Result 55 states and 94 transitions. [2020-10-19 18:23:55,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:55,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-19 18:23:55,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:55,823 INFO L225 Difference]: With dead ends: 55 [2020-10-19 18:23:55,823 INFO L226 Difference]: Without dead ends: 55 [2020-10-19 18:23:55,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-19 18:23:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-10-19 18:23:55,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-19 18:23:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 67 transitions. [2020-10-19 18:23:55,834 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 67 transitions. Word has length 19 [2020-10-19 18:23:55,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:55,835 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 67 transitions. [2020-10-19 18:23:55,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:55,835 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 67 transitions. [2020-10-19 18:23:55,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 18:23:55,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:55,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:55,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:23:55,837 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:55,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2084622274, now seen corresponding path program 1 times [2020-10-19 18:23:55,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:55,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138379299] [2020-10-19 18:23:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:55,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:55,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138379299] [2020-10-19 18:23:55,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:55,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:55,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959864812] [2020-10-19 18:23:55,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:55,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:55,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:55,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:55,930 INFO L87 Difference]: Start difference. First operand 40 states and 67 transitions. Second operand 4 states. [2020-10-19 18:23:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:56,077 INFO L93 Difference]: Finished difference Result 55 states and 92 transitions. [2020-10-19 18:23:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:56,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-19 18:23:56,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:56,080 INFO L225 Difference]: With dead ends: 55 [2020-10-19 18:23:56,080 INFO L226 Difference]: Without dead ends: 55 [2020-10-19 18:23:56,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-19 18:23:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-19 18:23:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-19 18:23:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 91 transitions. [2020-10-19 18:23:56,089 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 91 transitions. Word has length 19 [2020-10-19 18:23:56,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:56,090 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 91 transitions. [2020-10-19 18:23:56,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 91 transitions. [2020-10-19 18:23:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:23:56,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:56,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:56,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:23:56,093 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:56,093 INFO L82 PathProgramCache]: Analyzing trace with hash -450308896, now seen corresponding path program 1 times [2020-10-19 18:23:56,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:56,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377207438] [2020-10-19 18:23:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:56,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377207438] [2020-10-19 18:23:56,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:56,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:56,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305967280] [2020-10-19 18:23:56,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:56,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:56,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:56,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:56,191 INFO L87 Difference]: Start difference. First operand 54 states and 91 transitions. Second operand 4 states. [2020-10-19 18:23:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:56,378 INFO L93 Difference]: Finished difference Result 58 states and 94 transitions. [2020-10-19 18:23:56,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:56,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 18:23:56,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:56,380 INFO L225 Difference]: With dead ends: 58 [2020-10-19 18:23:56,380 INFO L226 Difference]: Without dead ends: 58 [2020-10-19 18:23:56,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-19 18:23:56,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-19 18:23:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-19 18:23:56,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 93 transitions. [2020-10-19 18:23:56,391 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 93 transitions. Word has length 20 [2020-10-19 18:23:56,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:56,392 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 93 transitions. [2020-10-19 18:23:56,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:56,392 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 93 transitions. [2020-10-19 18:23:56,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:23:56,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:56,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:56,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:23:56,394 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:56,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:56,395 INFO L82 PathProgramCache]: Analyzing trace with hash -192143458, now seen corresponding path program 1 times [2020-10-19 18:23:56,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:56,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442813848] [2020-10-19 18:23:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:56,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442813848] [2020-10-19 18:23:56,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:56,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:56,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276079947] [2020-10-19 18:23:56,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:56,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:56,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:56,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:56,466 INFO L87 Difference]: Start difference. First operand 57 states and 93 transitions. Second operand 4 states. [2020-10-19 18:23:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:56,596 INFO L93 Difference]: Finished difference Result 101 states and 167 transitions. [2020-10-19 18:23:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:56,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 18:23:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:56,599 INFO L225 Difference]: With dead ends: 101 [2020-10-19 18:23:56,599 INFO L226 Difference]: Without dead ends: 101 [2020-10-19 18:23:56,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:56,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-19 18:23:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-19 18:23:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-19 18:23:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 166 transitions. [2020-10-19 18:23:56,611 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 166 transitions. Word has length 20 [2020-10-19 18:23:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:56,611 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 166 transitions. [2020-10-19 18:23:56,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 166 transitions. [2020-10-19 18:23:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:23:56,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:56,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:56,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:23:56,614 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:56,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:56,614 INFO L82 PathProgramCache]: Analyzing trace with hash -893208036, now seen corresponding path program 1 times [2020-10-19 18:23:56,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:56,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334868719] [2020-10-19 18:23:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:56,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334868719] [2020-10-19 18:23:56,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:56,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:56,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791718721] [2020-10-19 18:23:56,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:56,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:56,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:56,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:56,686 INFO L87 Difference]: Start difference. First operand 100 states and 166 transitions. Second operand 4 states. [2020-10-19 18:23:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:56,818 INFO L93 Difference]: Finished difference Result 125 states and 209 transitions. [2020-10-19 18:23:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:56,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 18:23:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:56,821 INFO L225 Difference]: With dead ends: 125 [2020-10-19 18:23:56,821 INFO L226 Difference]: Without dead ends: 125 [2020-10-19 18:23:56,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-19 18:23:56,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 100. [2020-10-19 18:23:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-19 18:23:56,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 164 transitions. [2020-10-19 18:23:56,831 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 164 transitions. Word has length 20 [2020-10-19 18:23:56,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:56,832 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 164 transitions. [2020-10-19 18:23:56,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 164 transitions. [2020-10-19 18:23:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:23:56,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:56,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:56,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 18:23:56,834 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:56,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:56,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1654831735, now seen corresponding path program 1 times [2020-10-19 18:23:56,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:56,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345867666] [2020-10-19 18:23:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:56,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345867666] [2020-10-19 18:23:56,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:56,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:56,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246118440] [2020-10-19 18:23:56,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:56,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:56,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:56,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:56,899 INFO L87 Difference]: Start difference. First operand 100 states and 164 transitions. Second operand 4 states. [2020-10-19 18:23:57,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,021 INFO L93 Difference]: Finished difference Result 177 states and 295 transitions. [2020-10-19 18:23:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-19 18:23:57,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,024 INFO L225 Difference]: With dead ends: 177 [2020-10-19 18:23:57,024 INFO L226 Difference]: Without dead ends: 177 [2020-10-19 18:23:57,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:57,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-19 18:23:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-19 18:23:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-19 18:23:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 222 transitions. [2020-10-19 18:23:57,035 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 222 transitions. Word has length 21 [2020-10-19 18:23:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,036 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 222 transitions. [2020-10-19 18:23:57,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 222 transitions. [2020-10-19 18:23:57,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:23:57,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:23:57,039 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,039 INFO L82 PathProgramCache]: Analyzing trace with hash -953767157, now seen corresponding path program 1 times [2020-10-19 18:23:57,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210236113] [2020-10-19 18:23:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:57,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210236113] [2020-10-19 18:23:57,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282723829] [2020-10-19 18:23:57,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,103 INFO L87 Difference]: Start difference. First operand 136 states and 222 transitions. Second operand 4 states. [2020-10-19 18:23:57,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,224 INFO L93 Difference]: Finished difference Result 185 states and 297 transitions. [2020-10-19 18:23:57,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-19 18:23:57,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,226 INFO L225 Difference]: With dead ends: 185 [2020-10-19 18:23:57,227 INFO L226 Difference]: Without dead ends: 185 [2020-10-19 18:23:57,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-19 18:23:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-10-19 18:23:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-19 18:23:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 296 transitions. [2020-10-19 18:23:57,237 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 296 transitions. Word has length 21 [2020-10-19 18:23:57,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,237 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 296 transitions. [2020-10-19 18:23:57,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,238 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 296 transitions. [2020-10-19 18:23:57,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:23:57,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 18:23:57,240 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,240 INFO L82 PathProgramCache]: Analyzing trace with hash 246482505, now seen corresponding path program 1 times [2020-10-19 18:23:57,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294309037] [2020-10-19 18:23:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:57,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294309037] [2020-10-19 18:23:57,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668425458] [2020-10-19 18:23:57,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,298 INFO L87 Difference]: Start difference. First operand 184 states and 296 transitions. Second operand 4 states. [2020-10-19 18:23:57,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,404 INFO L93 Difference]: Finished difference Result 191 states and 301 transitions. [2020-10-19 18:23:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-19 18:23:57,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,406 INFO L225 Difference]: With dead ends: 191 [2020-10-19 18:23:57,406 INFO L226 Difference]: Without dead ends: 191 [2020-10-19 18:23:57,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-19 18:23:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2020-10-19 18:23:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-19 18:23:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 300 transitions. [2020-10-19 18:23:57,416 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 300 transitions. Word has length 22 [2020-10-19 18:23:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,417 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 300 transitions. [2020-10-19 18:23:57,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 300 transitions. [2020-10-19 18:23:57,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:23:57,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 18:23:57,419 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,419 INFO L82 PathProgramCache]: Analyzing trace with hash 504647943, now seen corresponding path program 1 times [2020-10-19 18:23:57,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357938810] [2020-10-19 18:23:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:57,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357938810] [2020-10-19 18:23:57,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556686775] [2020-10-19 18:23:57,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,475 INFO L87 Difference]: Start difference. First operand 190 states and 300 transitions. Second operand 4 states. [2020-10-19 18:23:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,582 INFO L93 Difference]: Finished difference Result 331 states and 525 transitions. [2020-10-19 18:23:57,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-19 18:23:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,584 INFO L225 Difference]: With dead ends: 331 [2020-10-19 18:23:57,585 INFO L226 Difference]: Without dead ends: 331 [2020-10-19 18:23:57,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:57,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-19 18:23:57,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 266. [2020-10-19 18:23:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-19 18:23:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 412 transitions. [2020-10-19 18:23:57,611 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 412 transitions. Word has length 22 [2020-10-19 18:23:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,612 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 412 transitions. [2020-10-19 18:23:57,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 412 transitions. [2020-10-19 18:23:57,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:23:57,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 18:23:57,619 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1205712521, now seen corresponding path program 1 times [2020-10-19 18:23:57,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438289589] [2020-10-19 18:23:57,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:57,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438289589] [2020-10-19 18:23:57,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967775272] [2020-10-19 18:23:57,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,673 INFO L87 Difference]: Start difference. First operand 266 states and 412 transitions. Second operand 4 states. [2020-10-19 18:23:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,792 INFO L93 Difference]: Finished difference Result 355 states and 537 transitions. [2020-10-19 18:23:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-19 18:23:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,795 INFO L225 Difference]: With dead ends: 355 [2020-10-19 18:23:57,795 INFO L226 Difference]: Without dead ends: 355 [2020-10-19 18:23:57,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-19 18:23:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 354. [2020-10-19 18:23:57,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-19 18:23:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 536 transitions. [2020-10-19 18:23:57,807 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 536 transitions. Word has length 22 [2020-10-19 18:23:57,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,807 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 536 transitions. [2020-10-19 18:23:57,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,807 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 536 transitions. [2020-10-19 18:23:57,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:23:57,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 18:23:57,809 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1529113642, now seen corresponding path program 1 times [2020-10-19 18:23:57,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698791902] [2020-10-19 18:23:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:57,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698791902] [2020-10-19 18:23:57,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914643234] [2020-10-19 18:23:57,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,863 INFO L87 Difference]: Start difference. First operand 354 states and 536 transitions. Second operand 4 states. [2020-10-19 18:23:57,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,961 INFO L93 Difference]: Finished difference Result 363 states and 537 transitions. [2020-10-19 18:23:57,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:23:57,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,963 INFO L225 Difference]: With dead ends: 363 [2020-10-19 18:23:57,964 INFO L226 Difference]: Without dead ends: 363 [2020-10-19 18:23:57,964 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 [2020-10-19 18:23:57,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-19 18:23:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 362. [2020-10-19 18:23:57,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-19 18:23:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 536 transitions. [2020-10-19 18:23:57,973 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 536 transitions. Word has length 23 [2020-10-19 18:23:57,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,974 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 536 transitions. [2020-10-19 18:23:57,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,974 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 536 transitions. [2020-10-19 18:23:57,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:23:57,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 18:23:57,976 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1270948204, now seen corresponding path program 1 times [2020-10-19 18:23:57,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117258490] [2020-10-19 18:23:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117258490] [2020-10-19 18:23:58,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797008795] [2020-10-19 18:23:58,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,022 INFO L87 Difference]: Start difference. First operand 362 states and 536 transitions. Second operand 4 states. [2020-10-19 18:23:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,135 INFO L93 Difference]: Finished difference Result 619 states and 913 transitions. [2020-10-19 18:23:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:23:58,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,140 INFO L225 Difference]: With dead ends: 619 [2020-10-19 18:23:58,140 INFO L226 Difference]: Without dead ends: 619 [2020-10-19 18:23:58,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-10-19 18:23:58,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 522. [2020-10-19 18:23:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-10-19 18:23:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 752 transitions. [2020-10-19 18:23:58,155 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 752 transitions. Word has length 23 [2020-10-19 18:23:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,155 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 752 transitions. [2020-10-19 18:23:58,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 752 transitions. [2020-10-19 18:23:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:23:58,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 18:23:58,158 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,159 INFO L82 PathProgramCache]: Analyzing trace with hash -569883626, now seen corresponding path program 1 times [2020-10-19 18:23:58,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121112690] [2020-10-19 18:23:58,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121112690] [2020-10-19 18:23:58,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207202593] [2020-10-19 18:23:58,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,233 INFO L87 Difference]: Start difference. First operand 522 states and 752 transitions. Second operand 4 states. [2020-10-19 18:23:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,341 INFO L93 Difference]: Finished difference Result 683 states and 953 transitions. [2020-10-19 18:23:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,342 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:23:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,347 INFO L225 Difference]: With dead ends: 683 [2020-10-19 18:23:58,347 INFO L226 Difference]: Without dead ends: 683 [2020-10-19 18:23:58,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2020-10-19 18:23:58,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 682. [2020-10-19 18:23:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2020-10-19 18:23:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 952 transitions. [2020-10-19 18:23:58,368 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 952 transitions. Word has length 23 [2020-10-19 18:23:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,369 INFO L481 AbstractCegarLoop]: Abstraction has 682 states and 952 transitions. [2020-10-19 18:23:58,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 952 transitions. [2020-10-19 18:23:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:58,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 18:23:58,372 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,372 INFO L82 PathProgramCache]: Analyzing trace with hash -738008780, now seen corresponding path program 1 times [2020-10-19 18:23:58,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29348426] [2020-10-19 18:23:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29348426] [2020-10-19 18:23:58,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105854842] [2020-10-19 18:23:58,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,431 INFO L87 Difference]: Start difference. First operand 682 states and 952 transitions. Second operand 4 states. [2020-10-19 18:23:58,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,531 INFO L93 Difference]: Finished difference Result 699 states and 953 transitions. [2020-10-19 18:23:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:58,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,535 INFO L225 Difference]: With dead ends: 699 [2020-10-19 18:23:58,535 INFO L226 Difference]: Without dead ends: 699 [2020-10-19 18:23:58,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-10-19 18:23:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 698. [2020-10-19 18:23:58,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2020-10-19 18:23:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 952 transitions. [2020-10-19 18:23:58,551 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 952 transitions. Word has length 24 [2020-10-19 18:23:58,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,551 INFO L481 AbstractCegarLoop]: Abstraction has 698 states and 952 transitions. [2020-10-19 18:23:58,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 952 transitions. [2020-10-19 18:23:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:58,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-19 18:23:58,553 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,554 INFO L82 PathProgramCache]: Analyzing trace with hash -479843342, now seen corresponding path program 1 times [2020-10-19 18:23:58,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907833377] [2020-10-19 18:23:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907833377] [2020-10-19 18:23:58,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071625962] [2020-10-19 18:23:58,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,597 INFO L87 Difference]: Start difference. First operand 698 states and 952 transitions. Second operand 4 states. [2020-10-19 18:23:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,693 INFO L93 Difference]: Finished difference Result 1163 states and 1561 transitions. [2020-10-19 18:23:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:58,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,700 INFO L225 Difference]: With dead ends: 1163 [2020-10-19 18:23:58,700 INFO L226 Difference]: Without dead ends: 1163 [2020-10-19 18:23:58,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2020-10-19 18:23:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1034. [2020-10-19 18:23:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2020-10-19 18:23:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1368 transitions. [2020-10-19 18:23:58,732 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1368 transitions. Word has length 24 [2020-10-19 18:23:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,733 INFO L481 AbstractCegarLoop]: Abstraction has 1034 states and 1368 transitions. [2020-10-19 18:23:58,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1368 transitions. [2020-10-19 18:23:58,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:58,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-19 18:23:58,737 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,738 INFO L82 PathProgramCache]: Analyzing trace with hash 221221236, now seen corresponding path program 1 times [2020-10-19 18:23:58,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56551821] [2020-10-19 18:23:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56551821] [2020-10-19 18:23:58,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983653082] [2020-10-19 18:23:58,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,793 INFO L87 Difference]: Start difference. First operand 1034 states and 1368 transitions. Second operand 4 states. [2020-10-19 18:23:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,927 INFO L93 Difference]: Finished difference Result 1323 states and 1673 transitions. [2020-10-19 18:23:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,937 INFO L225 Difference]: With dead ends: 1323 [2020-10-19 18:23:58,937 INFO L226 Difference]: Without dead ends: 1323 [2020-10-19 18:23:58,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2020-10-19 18:23:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1322. [2020-10-19 18:23:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1322 states. [2020-10-19 18:23:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1672 transitions. [2020-10-19 18:23:58,972 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1672 transitions. Word has length 24 [2020-10-19 18:23:58,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,973 INFO L481 AbstractCegarLoop]: Abstraction has 1322 states and 1672 transitions. [2020-10-19 18:23:58,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1672 transitions. [2020-10-19 18:23:58,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:58,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-19 18:23:58,977 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1983551263, now seen corresponding path program 1 times [2020-10-19 18:23:58,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337188838] [2020-10-19 18:23:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:59,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337188838] [2020-10-19 18:23:59,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:59,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:59,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601146837] [2020-10-19 18:23:59,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:59,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:59,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:59,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:59,035 INFO L87 Difference]: Start difference. First operand 1322 states and 1672 transitions. Second operand 4 states. [2020-10-19 18:23:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,165 INFO L93 Difference]: Finished difference Result 1355 states and 1673 transitions. [2020-10-19 18:23:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,173 INFO L225 Difference]: With dead ends: 1355 [2020-10-19 18:23:59,173 INFO L226 Difference]: Without dead ends: 1355 [2020-10-19 18:23:59,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-10-19 18:23:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1354. [2020-10-19 18:23:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1354 states. [2020-10-19 18:23:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1672 transitions. [2020-10-19 18:23:59,205 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1672 transitions. Word has length 25 [2020-10-19 18:23:59,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,205 INFO L481 AbstractCegarLoop]: Abstraction has 1354 states and 1672 transitions. [2020-10-19 18:23:59,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1672 transitions. [2020-10-19 18:23:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:59,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:59,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:59,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-19 18:23:59,209 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:59,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1725385825, now seen corresponding path program 1 times [2020-10-19 18:23:59,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:59,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767337778] [2020-10-19 18:23:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:59,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767337778] [2020-10-19 18:23:59,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:59,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:59,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903853317] [2020-10-19 18:23:59,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:59,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:59,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:59,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:59,257 INFO L87 Difference]: Start difference. First operand 1354 states and 1672 transitions. Second operand 4 states. [2020-10-19 18:23:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,366 INFO L93 Difference]: Finished difference Result 2186 states and 2600 transitions. [2020-10-19 18:23:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,376 INFO L225 Difference]: With dead ends: 2186 [2020-10-19 18:23:59,377 INFO L226 Difference]: Without dead ends: 2186 [2020-10-19 18:23:59,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2020-10-19 18:23:59,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2058. [2020-10-19 18:23:59,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2058 states. [2020-10-19 18:23:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 2472 transitions. [2020-10-19 18:23:59,425 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 2472 transitions. Word has length 25 [2020-10-19 18:23:59,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,425 INFO L481 AbstractCegarLoop]: Abstraction has 2058 states and 2472 transitions. [2020-10-19 18:23:59,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 2472 transitions. [2020-10-19 18:23:59,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:59,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:59,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:59,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-19 18:23:59,430 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:59,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:59,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1024321247, now seen corresponding path program 1 times [2020-10-19 18:23:59,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:59,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34988284] [2020-10-19 18:23:59,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:59,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34988284] [2020-10-19 18:23:59,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:59,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:59,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540606264] [2020-10-19 18:23:59,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:59,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:59,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:59,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:59,480 INFO L87 Difference]: Start difference. First operand 2058 states and 2472 transitions. Second operand 4 states. [2020-10-19 18:23:59,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,587 INFO L93 Difference]: Finished difference Result 2567 states and 2886 transitions. [2020-10-19 18:23:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:59,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,588 INFO L225 Difference]: With dead ends: 2567 [2020-10-19 18:23:59,588 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:23:59,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:23:59,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:23:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:23:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:23:59,590 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-10-19 18:23:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,590 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:23:59,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:23:59,591 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:23:59,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-19 18:23:59,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:23:59 BoogieIcfgContainer [2020-10-19 18:23:59,598 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:23:59,598 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:23:59,599 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:23:59,599 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:23:59,600 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:54" (3/4) ... [2020-10-19 18:23:59,605 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:23:59,614 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-19 18:23:59,614 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 18:23:59,615 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 18:23:59,622 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-19 18:23:59,622 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-19 18:23:59,623 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-19 18:23:59,623 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 18:23:59,694 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:23:59,694 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:23:59,700 INFO L168 Benchmark]: Toolchain (without parser) took 5584.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 198.7 MB). Free memory was 958.6 MB in the beginning and 826.6 MB in the end (delta: 132.0 MB). Peak memory consumption was 330.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:59,700 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:23:59,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 457.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 958.6 MB in the beginning and 1.1 GB in the end (delta: -163.3 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:59,701 INFO L168 Benchmark]: Boogie Preprocessor took 35.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:59,701 INFO L168 Benchmark]: RCFGBuilder took 382.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:59,702 INFO L168 Benchmark]: TraceAbstraction took 4601.78 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 72.9 MB). Free memory was 1.1 GB in the beginning and 834.5 MB in the end (delta: 256.4 MB). Peak memory consumption was 329.3 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:59,703 INFO L168 Benchmark]: Witness Printer took 95.66 ms. Allocated memory is still 1.2 GB. Free memory was 834.5 MB in the beginning and 826.6 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:59,705 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 457.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 958.6 MB in the beginning and 1.1 GB in the end (delta: -163.3 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 382.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4601.78 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 72.9 MB). Free memory was 1.1 GB in the beginning and 834.5 MB in the end (delta: 256.4 MB). Peak memory consumption was 329.3 MB. Max. memory is 11.5 GB. * Witness Printer took 95.66 ms. Allocated memory is still 1.2 GB. Free memory was 834.5 MB in the beginning and 826.6 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 41 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.5s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1252 SDtfs, 1714 SDslu, 147 SDs, 0 SdLazy, 866 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2058occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 511 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 431 NumberOfCodeBlocks, 431 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 411 ConstructedInterpolants, 0 QuantifiedInterpolants, 27714 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 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...